EBL 9V 6F22 Lithium Rechargeable Battery - 600mAh.
Improved low self discharge makes it still maintain 80% of capacity after 3 year of non-use.
Batteries are comes with precharged, no memory effect, could be used at any time.
Recommended for smoke alarms, professional audio and medical devices.
Could be used for any brand 9V Li-ion Enable chargers.