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IM CHARGING A AA RECHARGEABLE BATTERY USING A SOLAR PANEL, AFTER CHARGING THE BATTERY DRAINS VERY QUICKLY WHY?
Question by Aman C:
Im charging a AA rechargeable battery using a solar panel, After charging the battery drains very swiftly why?
Im charging a Rechargeable AA battery using a 2.4W Solar panel. The batteries are connected through a USB port. They are exposed to 6 hours of sunlight, They seem charged after, However the batteries do not retain the charge and get very swiftly drained. my question is why is the battery getting drained after showing 87% of charge.
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Answer by Sean
rechargeable AA baterys do not realy last that long and if u dont fully discharge b4 fully charging u can shorten the amount of life the battery has even more
Answer by J S
87% of the charge is not very much. A good 12V battery will actually read 14V when charged, and stay at that level for a long time. By the time it shows 10V or so, it’s probably nearly 80% drained.
Answer by roderick_young
Two thoughts, which might or might not be right.
The panel might not be putting out as much power as you think. Most likely, the panel is just out there in one orientation, not following the sun. If it’s just basically the panel wired directly to the battery, then I suspect the charging current is actually quite small. You could verify this by connecting an ammeter in place of the battery.
My second thought is that whatever is indicating the say of charge on the battery is not at all accurate.
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about 4 weeks ago
The battery is clearly not getting fully charged. You need a charge controller with your solar panel to properly control the flow of electricity. And the solar panel must put out more voltage than the fully charged battery does or else it will never fully charge the battery even with the charge controller. So you need to know more than just how many watts the solar panel can make, you need to know it’s voltage. And keep in mind that the 2.4W rating is no doubt the maximum you can get under ideal conditions. If you don’t keep moving the panel to point exactly at the Sun all the time you will loose some power. This requires turning the panel slowly all day to follow the Sun. Just setting out in the sun and walking away for 6 hours will result is less than 2.4W most of the time.
about 4 weeks ago
I have never had a rechargeable battery last long- no matter HOW it was recharged.