01-01-2021, 12:31 PM
Well, it's helpful if you have a DVM (digital volt meter),, & they can be bought <$20
This is likely LiCoO2, the commonest form of lithium battery (there are 6 or so)
Lithium batteries are a bit "fragile" , hence the charge controller (also dangerous (fire) when abused)
When < 2.5V,, DO NOT CHARGE, dead,, iffy if <2.8V
When frozen DO NOT CHARGE, thaw completely
DO NOT charge >4.2V
If 2.8-3.6V charge slowly,,C/100 (=100ma in this case)
Once it reaches 3.6V or > normal charge rate should be OK
A small, older cell phone charger with dropping resistor or couple diodes can substitute for PS
This is likely LiCoO2, the commonest form of lithium battery (there are 6 or so)
Lithium batteries are a bit "fragile" , hence the charge controller (also dangerous (fire) when abused)
When < 2.5V,, DO NOT CHARGE, dead,, iffy if <2.8V
When frozen DO NOT CHARGE, thaw completely
DO NOT charge >4.2V
If 2.8-3.6V charge slowly,,C/100 (=100ma in this case)
Once it reaches 3.6V or > normal charge rate should be OK
A small, older cell phone charger with dropping resistor or couple diodes can substitute for PS