Undervoltage Activation Charger

Warning: This is not a charger!
Principle:
If the battery is undervoltage or has been over-discharged, it may fail to accept a charge; when the original charger is plugged in, the indicator light turns green. An activation charger is required to reactivate the battery.
How to use the activation charger:
First, charge the battery using the activation charger for 20–30 minutes. Then, try using the original charger; if its indicator light turns red, normal charging can proceed.