Editing Talk:Battery firmware lockout (section)

=== Reconditioning ===
The voltages written in this section are '''open circuit voltages''' i.e the measured voltage when neither charging nor discharging. This is only a general guideline, the actual voltage may be higher or lower depends on the battery chemistry.

==== Disclaimer ====
Troubleshooting Li-ion batteries can be dangerous, this section is for informational purposes only. You are responsible for your own safety. Always wear appropriate protection and consult the specification of the equipment carefully.

==== 2.5V or above ====
charge normally.

==== 2.0V<voltage<2.5V ====
Charge slowly (<0.1C), resume normal charging speed above 3.0V, then do a charge/discharge cycle normally and measure the capacity, if normal continue to use, if lower replace it with a matched sell or put this cell to another pack with worn cells to match them.

==== 1.0V<voltage<2.0V ====
Charge very slowly (<0.05C). Observe the voltage and temperature carefully. If voltage fails to rise or temperature rises rapidly, chemical decomposition has occurred, do not use. When the voltage reaches nominal (around 3.7V), stop charging and wait for several hours, if the voltage is gone do not use, if not, proceed to normal charging. Do a charge/discharge cycle normally and measure the capacity. If capacity is way lower or internal resistance is way higher than before, do not use.

==== <1.0V ====
Replace the cells. It may be possible to revive it, but massive performance loss and additional safety risk is almost guaranteed. Don't even bother.

==== Unbalanced ====
Charge the lower(est) cell(s) to the voltage of other cells and perform a cycle. Observe the voltage of each cell, replace the ones with much higher/lower during charging/discharging.