Solar Powered Battery Charger Charges 4 D, C, AA and AAA Batteries
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- Charges 4 batteries at a time. Either AA, AAA, C or D cell rechargable batteries.
- Comes with USB charging port to charge most cell phones, cameras and other USB devices. .
- Also has various other charging plugs for charging a variety of electronics. .
- Weather resistant housing alows for out door use.
- This model has a blocking diode to prevent reverse power flow at night.
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This unit will charge four equivalent D C AA AAA sized batteries at any one time. It includes an adjustable stand to assist in positioning for the best angle toward the sun. Can also be used indoors when placed in direct sunlight through a south-facing window. Bright sunlight is not necessary for this unit to work properly, but it obviously works faster when available. Overcast days are fine but it increases the time necessary to recharge the batteries completely.
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To charge 10.4 mAh (4 x 2600 mAh) ten percent in ten hours leaves a rate of charge slightly over mAh per day. That is the equivalent of charging one of my AAA batteries which are rated at 1mAh daily. If this rate of charge works for your needs, then this charger is for you. If not, then I would look into larger solar chargers. Goal Zero makes a higher performing solar charger Goal Zero 19006 Guide 10 Adventure Kit with 4 Goal Zero AA Batteries for about $90 which is considerably higher performing than this solar charging box.
For $35 this solar battery charger get's the job done, but very slowly. If you require faster charging times, I would pass on this charger, spend more money, and get the one that better fits your needs.
I found a good use for this solar battery charger. I now use it to store batteries and keep them ttrickled charged. To fully charge my D cell batteries, I use the Ansmann Energy 8 Plus chargerAnsmann Energy 5207442/US 8 Plus Battery Charger and Maintenance Device. To keep things solar, I plug my charger into a Marine Portable Generator Allstart Tools 556 Marine Battery Jump Starter with AC Inverter which I charge with a 15 Watt Solar Panel from Goal Zero Goal Zero 32101 Boulder 15M Solar Panel
My AA and AAA cels are charged with a Instapark 10 Watt Solar Panel Instapark 10 Watt Solar Panel Portable Solar Charger with Dual USB Ports for iPhone, iPad & all other USB Compatible Devices hooked into a Goal Zero battery charger: Goal Zero 11406 Guide 10 Plus Silver Battery Pack
By rotating my batteries through The Solar Powered Battery Charger, I keep them top off. This is the best use I've found for this particular charger.
Battery capacity ratings are meaningless when used to compare different types of batteries or to compare the capacity of batteries powering different types of devices. You cannot predict (except by usage and you timing the life in your device) how long your electronic device will last. AA alkaline batteries typically have a capacity rating of over 2,500 mAh vs AA NiMH batteries have rated capacities of only 1,200 to 1,900 mAh, but the NiMH batteries will generally run the same device for 75 or 80 percent longer. There's where you have to weight price vs utility.
When you are comparing the capacity ratings of similar types of batteries, it is dicey. Different manufactories measure capacity in different ways, such as `average' or `peak'. How faster the battery charges will also affect the `life' of the battery, but unless you keep them a long time and charge them (like a hand-held work radio) everyday, you probably will not notice. One thing to note is NIMH or NiCds batteries have a life about 25% longer than standard alkaline.