Their 20 watt solar charger is quite small, at 14” x 16” and just 1/4” thick. Keep your battery charged – Clean, green, and free energy wherever you are – Reduce energy loss from electronics – Operate even on a cloudy day. Side Refine Panel. We recommend 20 watts or more for general use. Pros: Great option to maintain boat battery while in winter storage. Please wait... My Account ; Sign in or Create an account. Second, it’s incredibly lightweight at just 11.2 ounces – one of the lightest solar chargers, if not the lightest, on the market. This solar charger’s two USB A output ports are rated at different charging speeds. The most expensive item on this list, but also one of the most capable, Voltaic System’s Arc 20 is specifically designed to charge laptops and includes not only a solar panel, but a battery pack as well. Do solar battery chargers work on cloudy days? Get it as soon as Fri, Oct 2. Can a solar charger overcharge a battery? Feature-laden and loaded with fast-charging USB ports, the AMZGO Portable Solar Power Bank is the best solar battery charger you can get. 4.4 out of 5 stars 203 $34.99$34.99 Get it as soon as Wed, Aug 5 The solar panel also includes a small blue LED light right on the front which flashes when its charging your battery – a nice little touch that allows you quickly keep tabs on your battery’s current state of affairs. If you’re looking at solar chargers for cars or boats (or any other 12 volt application), you’ll probably see a lot of discussion around blocking diodes and charge controllers and whether this or that particular product needs one. Solar panels come in a wide array of sizes and power outputs, so rather than asking how many solar panels, we should be asking how much solar panel power is required to charge a 12V battery. … Dual 3.1a quick-charging USB ports and an in/out USB C port can all change devices at the same time as the Qi wireless charger, and they’ll all auto-detect your device’s current to pair for the optimal output. The charger itself is 14” x 8.5” and just under an inch thick. Wait time is short, there’s no long phone prompt menu, and the employees are knowledgeable. Whether you’re spending long days hustling between classes on a college campus, taking a well-deserved international vacation, or backpacking through the backcountry, solar battery chargers with power banks will help you stay connected to your devices for days on end. Get the best deal on Solar Panels & Chargers at Marine Deals. This is the ultimate personal solar battery charger. Sunforce 2W 12V Solar Powered Panel Battery Charger Maintainer Boat Car RV 58012 100% Weatherproof. Without a blocking diode, your battery can actually send electricity back to the solar panel at night, when the panel isn’t producing electricity. If you’re looking to keep your vehicles’ battery or smartphone topped up, solar chargers can get it done. BigBlue though has solved the issue by including a chip that automatically pauses charging when shaded, then restarts when sunlight is available again. Additionally, solar panel charging systems can be set up for 24 and 48 volt DC systems and can be used to supply your cabin with electricity. The only real downside to the kit is the high price, but considering you get a multi-use solar panel, AAs, and powerbank, it’s really not a terrible deal for something so flexible. Fist, POWOXI also manufactures a monocrystalline version of this same solar charger for a bit less. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Free postage. A solar battery charger will include a solar panel, as well as wires to connect the solar panel to your battery or device. Marine solar panel kits: This solar battery charger’s versatility is what makes it an excellent choice for RV enthusiasts. The flexible panels of the SUAOKI Solar Charger provide plenty of energy for battery tending. This trickle charge will keep your batteries topped off and it comes with suction cups so that you can easily attach it to the inside of a windshield. This device is rainproof, dustproof, and shock-proof. Solar chargers for 12 volt applications like cars, RVs, and boats are designed to only maintain your battery’s charge when not in use. Its ingenious design is completely weatherproof and easily installs onto a watercraft’s exterior. DuraVolt also notes that their 12v chargers don’t need a charge controller, as they use self-regulating panels with a lower operating voltage than other 12v solar panels. Set and forget the ECO-WORTHY Portable Power Solar Panel. The beauty of a solar battery charger is the simplicity and ease of use just about anywhere with sun. These questions are easily answered by reading the description and customer reviews, or even asking a question to the extremely-helpful Amazon community. An important note: The charger doesn’t come with a blocking diode or charge controller. Peace Corps trips in West Africa and extended trips in the backcountry are just a couple of the situations people use this charger for. This units employs the latest in PWM micropocessor-based charging techniques for … Its high cost relegates it to special use cases, so there aren’t as many reviews as for other cheaper items, but customers certainly put this thing through the ringer, claiming it’s for serious off-grid use and that it’s up to the task. A carabiner and multifunctional LED light add to the rugged aesthetic, and Qi wireless charging on the back panel is enabled for compatible devices. The solar panel is encased within UV-resistant ABS plastic and includes mounting holes in each corner, along with suction cups to mount the panel. If you’re worried, 10 to 15 watts should be enough to keep any vehicle ready for use. Get it as soon as Mon, Nov 16. $29.99 to $40.99. All Rights Reserved. Price: $125.00 Buy Now. First off, it’s just 0.08” thick and 10” x 6” in diameter, so it’s easy to fold flat in your pack or clip to the outside of your backpack while hiking. Second, Battery Tender also includes an integrated blocking diode in their solar chargers. Battery & Solar; Batteries, Chargers & Monitors; Categories. The GRDE Solar Power Bank is a compact power bank with an efficient 1.5W solar charger that can charge two devices simultaneously through dual USB ports. DuraVolt uses neodymium magnets, the strongest magnet on the market, for these chargers. Trickle chargers usually have no issue maintaining their weak electrical current on cloudy days. TP-solar Portable Battery Charger Kit Key Features: The DuraVolt Marine Solar Battery Charger has a flexible aluminum backing and is covered in an unbreakable plastic film, making it a bendable solar panel that will mount well onto flat or curved surfaces. POWISER 3.5W Solar Battery Charger 12V Solar Powered Battery maintainer & Charger,Suitable for Automotive, Motorcycle, Boat, Marine, RV, Trailer, Powersports, Snowmobile, etc. You can hang this power bank on your backpack with the included lanyard so that the solar panel will soak up the sun while you walk. Built for outdoor enthusiasts, the rugged Benfiss Portable Solar Charger is padded with shock-absorbing silicone to protect it against sudden falls. Solar power battery chargers with power banks store this electricity for later use, often through USB ports and DC outlets. Currency Displayed in . Energy is supplied to the 26800mAh power bank via a 1.5W solar panel and fast-charging USB C input where it can then be stored and released through the same USB C port and an additional two USB A ports for a total output of 18W. You’re also able to charge the batteries via an outlet or USB at home, so you don’t have to have a sunny picnic every time you need some fresh AAs. Typically, a 100W or greater solar panel system will adequately charge a 12V battery. Two 3.1A USB ports, a USB C port, and a Qi wireless charging pad dish out the 26800mAh quick when you need it. Each 12V battery is also different and may require a specific amount of volts and amp-hours to charge. An LED indicator light showcases the battery’s condition, and an interior Maximum Power Point Tracking chip manages charging levels while ensuring full overcharging and reverse discharge protection. Large and sun-charged, the ENKEEO 50W Foldable Solar Panel pumps out watts like it’s no big deal. The Sun force 50022 5-Watt Solar Battery Trickle Charger is made up of an aluminum frame with the solar cells of amorphous which is durable and a have the good long life. Here are the top picks. Considering factors such as photovoltaic efficiency, versatility, and reliability we have chosen our top picks and listed the best of the rest to give you a detailed rundown of the finest solar battery chargers around. PowerEZ 24Volt 10 Watts Solar Battery Charger for Trolling Motor,Boat, RV & Marine, 0.28 Amp Trickle Solar Charger, Self Regulating-No Experience Plug & Play Design, Dimension:16.14 X 9.13x0.31inch 4.1 out of 5 stars 7 $98.88$98.88 Get it as soon as Tue, Sep 8 Equipped with its very own magnetic compass and LED flashlight, the LEO WAY Solar Charger is both a survival tool and a power bank in one. The Arc 20 though includes three different power output options: The battery pack has a capacity of 24,000 milliamp-hours, enough for 1 laptop charge, 7 smartphone charges, or 3 tablet charges. They’re cheap, reliable, and extremely light weight. DuraVolt Marine Solar Panel Battery Charger, 8.3 Watt Solar Panel . The DuraVolt 20W Marine Solar Battery Charger tops our list for the best solar battery charger for boats. It’s extremely portable, low cost, and well-made. Quick Look: A compact, low-cost solar charger with great customer reviews. Inside, the crystalline cells within the solar panel have the industry’s highest conversion efficiency. Take a second to read the description and reviews to see exactly what features come with the charger. The LED flashlight isn’t the strongest among its peers, but its design makes it easier to use as a traditional flashlight. This unit also features a substantial 15000mAh battery capacity and is both waterproof and shockproof. Get it as soon as Thu, Sep 17. DuraVolt also manufacturers a magnetic solar charger based around the same extremely rugged solar panel as their marine products. Bottom Line: DuraVolt’s Magnetic Battery Maintainer might be more expensive than other similarly-sized battery chargers, but it’s easy to install, extremely rugged, and backed up by excellent customer service. Equipped with dual 3A USB A output ports, a 12V cigarette lighter adapter, and alligator clips, this unit is ready to power any device you can throw its way. Shop with confidence - get free shipping to home or stores + price match guarantee! It’s one of the safest, easiest chargers to use. A slim piece of hardware at an affordable price, the AMZGO Foldable Solar Power Bank is like the little brother to our top overall pick. When folded, the entire unit is thin like a modern tablet and its length and width dimensions are less than that of a sheet of paper. 2020 Waterproof Solar Power Bank 900000mAh Portable External Battery Charger … We’ve chosen the AMZGO Portable Solar Power Bank as our overall top pick. 10W PORTABLE SOLAR TRICKLE BATTERY CHARGER-CAR RV MARINE ATV ALL 12V SYSTEM. Was this information helpful? It’s that easy. Quick Look: Best design award! Keep the device within arms reach at night so that you can utilize the brilliant 60 LED backlight as a flashlight, camp light, and mosquito repellent. Compact power banks utilize solar charging for hassle-free energy gains that can be used to recharge the batteries in smartphones and tablets, while solar trickle chargers are the perfect solution for maintaining 12V batteries in cars, boats, and, RVs. FREE Shipping by Amazon. Portable solar battery chargers are perfect for maintaining and extending the life of 12V power systems for cars, trucks, tractors, motorcycles, boats, ATVs, RVs, campers, and mowers. A USB C input port is the primary power supplier of this device, but the 1.5W solar panel is capable of fully charging the 10000mAh power bank after basking in the sunlight for 60 hours. The information you’ll need to compare each one is included with the listing. The 11.8″ x 10″ panel converts the sun’s rays into 8.3W of electricity that is then sent through a regulator to trickle charge an attached 12V battery. Skip to main content. Well-received by users for its quality construction, reliable i26 wireless charger, and high-capacity 26800mAh battery, the ORYTO Qi Wireless Solar Power Bank is a truly great buy. Now that’s a great design! Quick Look: A serious off-grid solar+battery kit that provides 5 to 24 volts and can charge laptops, phones, tablets, and other gadgets. Take a look at the products above and find the best solar battery charger that’s right for you! AU $59.95. ... 50W 12V Dual USB Solar Panel Battery Charger Car Boat W/ Cable + Controller T0S6. Trickle chargers are used for larger 12V batteries such as those in boats, cars, and RVs to tend or maintain the battery’s charge levels when not in use. Whether you need a solar battery charger for boat, solar trickle charger for car battery, or a solar ac charger, we have the right chargers for any application. They’re just solar panels with some cords attached. But what the heck are they? The power bank can alternatively be charged directly through the USB C port. see all. Charge controllers keep your solar panel from overcharging and damaging your battery. Before we move on, here’s an important distinction. Most solar chargers for vehicle batteries come in around 5 to 15 watts. Modern solar power banks make for excellent travel companions as they can keep your favorite devices charged for extended periods of time. Watchdog Reviews® is a free source for techies, providing expert reviews on top tech gadgets and products. This 12V solar panel charger is perfect for use on the … Read on to learn more about each of the best solar charger companies on our list to find the perfect one for your battery or devices. RVs, cars, boats, lawnmowers, and more will benefit from the ample 1A trickle charge of this device. 99. Quick Look: A physically large, waterproof solar charger that comes in three sizes, from 5 to 15 watts, built-in controller and diode. He spends his days dreaming about the advancement of technology and has published several science fiction novels set in cyberpunk worlds rife with futuristic gadgets. Others however recommend purchasing and using a charge controller for any solar panel larger than 5 watts. Certainly the brightest of the budget solar battery chargers, the Etxian Waterproof Power Bank utilized 15 LEDs for high-intensity lighting. With the four AA batteries collectively totaling 9,200 mAh of capacity, you can charge your smartphone a couple times before you need to pull out the solar panel. Bottom Line: The Energizer PowerKeep is probably the most innovative product on our list. It won’t produce as much electricity in low light conditions, but if you’re just going to connec the charger and leave it for a full season, it’ll work just fine and save you a few bucks. Bottom Line: POWOXI’s solar battery charger is low-cost, compact, and easy to set up, perfect for winter when your motorcycle is covered. If you’re looking to power an RV, boat or camping set up (instead of topping up batteries), I would suggest looking at solar power kits instead. DuraVolt customers typically have two things to say about the company. Add to Compare. Compare. 4.7 out of 5 stars 62. $125.00 $ 125. In most cases, yes, though the solar panels won’t be as efficient as they would be in full sunshine. Exactly how many watts you need depends on the specific devices you want to charge, as well as how many devices. We searched and searched for the best solar chargers available this year and focused in on eight products in eight different categories, laid out below. It’s designed and built for those times when the utility grid is simply not an option. These small solar chargers aren’t big enough to fully charge dead batteries, so instead they just trickle charge the battery, ensuring they’re always ready for your next adventure. The charger includes some tech that detects your connected devices to charge each in the fastest method. POWOXI-9W-Solar-Battery-Trickle-Charger-Maintainer -12V Portable Waterproof Solar Panel Trickle Charging Kit for Car, Motorcycle, Boat, Marine, RV, Trailer, Powersports, Snowmobile, etc. Users note it can charge smartphones and laptops in a few hours, but it needs full sunlight to really charge efficiently. And are they even important? It even has a carabiner clip and built-in magnetic compass to aid in your outdoor adventures. Pro Sport 20 Plus Marine Battery Charger $589.55 $545.33. Small battery chargers though usually don’t include a solar charger and many manufactures note that small 12 volt solar panels really don’t need a controller, as they don’t provide enough juice to overcharge the battery. It actually uses Sunpower solar panels, some of the most efficient solar panels currently available! This solar charger is available in various sizes, each with a built-in blocking diode which prevents your battery from draining. We looked at 20 other solar battery chargers. The charger uses amorphous silicon solar cells, which perform well in low-light conditions. First, Battery Tender’s Solar Charger includes a built-in charge controller to protect your battery from over-charging and possibly suffering from premature death. This small size and the low weight of just 2.2 pounds makes this charger extremely portable and easy to set up. 4.3 out of 5 stars 338. Some kits can also include a few additional tech items like charge controllers and blocking diodes (more on those later). DuraVolt Marine Solar Panel Battery Charger, 8.3 Watt. Most customers praise its charging abilities, simplicity, and light weight. 12 Volt, 5 Watt Solar Battery Trickle Charger. Solar chargers for smartphones and tablets, however, produce the 5 volts your iPhone actually needs to recharge after a complete discharge. The AMZGO Portable Solar Power Bank is an absolute powerhouse of a solar battery charger. With these products, users have to unplug their devices to jolt the device into working again. DuraVolt Marine Solar Battery Charger Key Features: Solar battery chargers with power banks are ideal for on-the-go people who frequently find themselves with low batteries in their cellphones, tablets, and e-readers. However, it’s got some great features that set it apart from almost every other solar charge controller out there. 6-10 V. 11-15 V. 16-20 V. 21-25 V. … Shop Solar Chargers from popular brands such as WAAREE, Solar Inertia, Belifal and more for best prices at Amazon.in. If you’re looking for a solar charger for your 12 volt battery (in other words, for your car, boat, or RV), you’ll want your charger to include, at least, a blocking diode (see above), and the correct cords for your application (alligator clips for short term use, battery terminal rings for long-term storage, cigarette adaptors if you want to charge in the car, etc.). The device even includes a built-in ammeter, so you know how much electricity your solar panels are producing. Quick Look: A thin, ultralight – and ultra simple – solar battery charger perfect for those extended backpacking trips. It is ideally used when your boat is sitting for long periods of time in storage, or in such recreational situations as when you’re camping for several days and need to ensure the battery remains at full charge. Of course, this solar charger isn’t just for motorcycles. Realizing recreational boaters and other industries could benefit from these small, durable solar panels, they branded them as DuraVolt and now you can find them on Amazon. Order Tracking; My Account; My Cart / Checkout; Gear up and go. The F.DORLA Solar Charger is as small as your smartphone and unfolds into a stream of four solar panels. Reviews celebrate this solar charger’s ability to maintain year-round battery health. (3.5W Poly) 4.3 out of 5 stars 122. As the solar panel is semi flexible, it can flex to the curve of your vehicle’s hood or any other metal, ‘gently curved’ surface. Having the ability to run household appliances on the road or on the high seas is a great convenience. Can it be glued down or not? Surprisingly lightweight and packable, the Aeisuny Foldable Solar Panel is a high-powered portable solar charger that can charge up to three devices at once. Overall, we think the flexibility, functionality, and ease of use of solar-powered battery chargers easily make up for their higher purchase price. Great Range - Solar Panels, Solar Chargers, Solar Battery Chargers, Solar Mobile Phone Chargers and more. Image source: Amazon. For large solar installations, they’re a required piece of equipment. Save 5% with coupon. Loaded with three output ports, two input ports, LED charge indicator lights, an LED flashlight, and a solar charge indicator light, the full-featured Aonidi Solar Charger is among the best solar power banks on the market. This is one of the more popular solar chargers for iPhones and other smartphones, and for good reason. Does it have holes in each corner? FREE Shipping by Amazon. Does it come with carabiners or suction cups to clip or stick to different surfaces? All of our reviews and recommendations are based on unbiased research by our editorial team. It includes a 10’ cord ending in an SAE output, with alligator clips and a cigarette lighter adapter (if you want to charge a vehicle). Most solar chargers for small devices sit around 15 to 30 watts, with the average around 22 to 28 watts. Copyright © 2020 - EarthTechling. Shop, read reviews, or ask questions about Solar Chargers at the official West Marine online store. FREE Shipping by Amazon. These units have been designed to be water proof and corrosion resistant ensuring long life in the harshest of marine environments. Boat and RV batteries are susceptible to running low on juice because they often sit unused for long periods of time. If you don’t have a blocking diode in your solar charger, you have to disconnect your battery from your solar charger every night. Finding the right solar charger for your needs is essential to your battery’s health. DuraVolt claims their solar battery chargers do not need a blocking diode or charge controller, thanks to their unique design and quality components. When unleashed, the three solar panels work to charge a 20000mAh lithium-polymer battery that can charge up to three devices simultaneously. The solar battery charger is equipped with a fused SAE output plug, and it comes packaged with a lighter plug adapter, battery terminal adapter, and alligator battery clips. Built of rugged silicone, this power bank can take a beating. Some buyers choose to add one or the other, or both, after buying the kit, but most seem to just install what’s included without any additions and report the charger still works great. Solar battery chargers are a low-maintenance solution to our modern on-the-go electricity needs. Dual LED flashlights combine to create a bright emergency light, and they’re programmed to function in three different operating modes: bright, flash, and SOS. You’ll certainly pay more for them, but you’ll also know your RV’s battery will always be ready to go. A handful of buyers still use a charge controller, but the manufacturer notes it’s not necessary thanks to this low voltage. Whether you need to charge a cellphone or power a 12V vehicle battery, the TP-solar Portable Battery Charger Kit has you covered. The two USB A ports and the Qi wireless charging pad can charge devices at a speedy 2.1A rate. Users routinely say the charger is durable, fast-charging, and well-priced. Battery Tender’s been around for ages and you can find their products online and in person at stores like Walmart and local auto parts store. As compact as your favorite tablet, the Enther Portable Solar Power Bank is an efficient solar charger that converts up to 23.5% of solar energy it receives into stored power. Quick Look: DuraVolt’s sturdy solar chargers are specifically designed for heavy-duty marine use. 4.7 out of 5 stars 78. Your Currency. ... Decdeal 18V 5.5W Semi Flexible Solar Panel with Cables Outdoor Sun Engergy Power for Battery Charger for Car Boats Rv 31.5 X 16.5 X 0.15Cm. The Slos Portable Solar Charger utilizes two USB 3A high-speed ports, an in/out USB C port, and has a Qi wireless charging pad. $46.99$46.99. You can easily slide it into your purse or laptop bag and take it out to soak in the sun at a moment’s notice. 4.3 out of 5 stars 343. We reviewed a plethora of different solar battery chargers and have identified the best available today. Since solar panels put out pure DC power, they are excellent chargers as long as they have a regulator in the circuit when they require it (see below). If you’re stuck in cloudy or rainy weather, 10 watts just isn’t enough to charge. Second, DuraVolt’s customer service is excellent. Using a solar battery charger is an easy way to keep your vehicle’s battery, your phone, or even laptop juiced up and ready to go. Larger vehicles typically require larger batteries, but it really depends on your vehicle’s phantom loads (ie power pulled from the battery even when the key isn’t in the ignition) and driving frequency. If you want a battery that can light up the night, the Sethruki Solar Power Bank is for you. The two most coarse causes for Rv battery failure are undercharging and overcharging. 10 V or Less. This is the only charger on our list that has this very helpful feature! Marine Solar Battery Chargers/Maintainers & Kits. Of course, some are more expensive than others, but if they are, we’ve laid out exactly why you’d want to spend that extra cash. In most cases just put the solar panel in the sun and connect your battery. Users report that the included 6 watt solar panel can charge four AAs in about six hours in full sun. The higher end models can come in at $100+ and tacking on a battery pack can add even more. Its purpose is to charge a battery at its… Solar battery chargers with power banks are ideal for on-the-go people who frequently find themselves with low batteries in their cellphones, tablets, and e-readers. AU $13.50 postage. This Week's Deals Expire In: 00 Hours 00 Minutes 00 Seconds. Power banks with small solar panels may not perform so well on cloudy days, but most are equipped with USB charging ports so that you can alternatively charge the power bank via a computer, 12V outlet, or wall outlet. POWOXI 7.5W-Solar-Battery-Trickle-Charger-Maintainer -12V Portable Waterproof Solar Panel Trickle Charging Kit for Car, Automotive, Motorcycle, Boat, Marine, RV, Trailer, Powersports, Snowmobile, etc. However, we include them all here, as most of us collectively refer to all of it as solar battery chargers. Customers confirm the charger’s great performance stats and noted that, even though the chargers are quite large, they’re lightweight and easy to maneuver. A built-in blocking diode prevents reverse discharge. And many report it works great in low light, cold weather, and extreme heat – exactly what you want to hear for an all-weather, outdoors solar charger. A USB C input port enables high-speed computer or wall charging to supply the power bank with electricity when the solar panels are unnecessary or inefficient due to bad weather. Maintaining a battery’s charge requires much less power and can be done by as small as a 5W solar panel. This product would be a great addition to a vehicle or camping emergency kit. Boats, RVs, lawnmowers, and other infrequently used equipment with large 12V batteries need tenders with a trickle charge to maintain optimal battery health. Even though it’s larger than others on our list, with these nice additions you don’t have to worry about your car’s battery. The charger includes a 10 foot cord that ends with an SAE output as well as alligator clips and battery terminal adapters. High Efficiency and Portable: The solar panel is 10W … More Buying Choices $119.00 (3 new offers) TP-solar Solar Panel Kit 10W 12V Monocrystalline Trickle Battery Charger Maintainer + 10A Charge Controller + Cable with Alligator Clip O-Ring Terminal for Car RV Vehicle Marine Boat Off Grid System. 4.5 out of 5 stars (11) 11 product ratings - 10W PORTABLE SOLAR TRICKLE BATTERY CHARGER-CAR RV MARINE ATV ALL 12V SYSTEM. It’s heavy-duty, waterproof, and comes with everything you need to keep your battery topped up with free, clean energy. Customers report using this little battery charger for jet skis, RVs, trucks, and cars. This unit also features a substantial 15000mAh battery capacity and is both waterproof shockproof! Make it the ideal solar battery trickle chargers usually have no issue maintaining their weak electrical current on cloudy.... ; Categories you know how much electricity your solar panel, then use the batteries to a... A specific amount of solar chargers for smartphones a great way to avoid any potential.. Simple terms, the three solar panels won ’ t enough to charge the power Bank take. What is a great addition to a battery charger and how does come! Banks make for excellent travel companions as they can keep your favorite devices charged for extended periods of.... 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Substantial 15000mAh battery capacity and is both waterproof and dustproof, and backed up with,. Topped up with free, clean energy charger based around the same rugged...