Quote:
Originally Posted by Quoth
It is for LiPoly.
There is a minimum voltage at which it's safe to charge. Electronics is supposed to disconnect at about 3.7V
Charger is supposed to disconnect at about 4.2V, so you could measure 2.5V on a cell and it will never try to charge.
Many cells have a PCB with a controller built in. If the original had that, then the replacement needs one. If there was no built in controller then a cell should be identical.
They are the most tricky rechargeable technology.
Unless it's strange, the only absolute requirement of a charger is the voltage. 5V now and 5.2V on really old things. Even a 20A charger will still only charge at 500mA maximum if that's what the gadget takes. Only newer things take more than 500mA (1/2A). Also charge will be less at the start and end in most cases.
There is no ongoing trickle charge with LiPoly, that would set them on fire.
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Hi, just reading through this thread again for more clues.
Here is the type of battery I got.
Here is the datasheet. Perhaps you could indicate as to its suitability.
I was wondering maybe it is an overvoltage issue and your above post seems to indicate it may be? Does the battery require less than 5v to charge then would you say from what the datasheet says?
I know a little about the technical stuff but not too much.
I notice on the barrell connection on the sony reader it says 5.2v so I presume it is also the same for the usb connection I am using.
Could that be the issue? Any workaround if so? I have done some trickery with voltage step downs on my van's electrics in order to charge my laptop (which wants constant 12 whereas my lifepo4 leisure battery is 13+/-) and also connected phone charger right to the blade fuse holder with another step down to 1v or so.
Wondering if some similar trick could be done here? Perhaps if no solution could be found with the battery I could just take it out completely and try another step down and solder a connection right to the reader
. I have wondered if that would work to do away with the battery part on other battery dependent devices.