Have a fully discharged Nokia BL-5J 1430 mAh 3.7 Battery that would like to safely test for charge retention.
Did some forum searching and found some general info.
Did not find anything concerning:
- how to test if the battery fuse and protection circuit is intact. Just g uessing that if infinite Ohms something is blown but have no idea what the normal Ohms should be.
- Use another battery to try to charge the Nokia to get it above the charg er cutoff point?
Hope someone has solved this problem and would like to share any tips.
Googled and found "Li-ion should never be discharged too low, and there are several safeguards to prevent this from happening. The equipment cuts off when the battery discharges to about 3.0V/cell, stopping the current flow. If the discharge continues to about 2.70V/cell or lower, the battery's prot ection circuit puts the battery into a sleep mode. This renders the pack un serviceable and a recharge with most chargers is not possible. To prevent a battery from falling asleep, apply a partial charge before a long storage period."
Also found by another Ken who does not want to share his method "On Februar y 4, 2011 at 2:21pm Ken wrote: The article mentions how dangerous it is to attempt charging cells that hav e been @