Microprocessor automatically switches to trickle charge after batteries are finished charging, so they maintain their charge.
Compatible with 7.2V, 8.4V, and 9.6V Rechargeable 9V Batteries.
Individual LED for each charging channels indicates when batteries are ready to go. No guessing about batteries. Green means ready and Red means charging.
Capable of even reviving older 9V batteries which may no longer be accepting a charge.