Specifications:
Battery Type: Nickel Metal Hydride Battery (NiMH Battery)
Voltage: 9.6V/8.4V
Extend your NiMH battery pack life with the following practices:
Fully recharge your new battery pack when you first receive it.
Do not over-discharge the battery, stop using it when you notice a drop in performance.
Do not over-charge the battery, remove the battery from the charger when you are done recharging.
Heat lowers battery life, do not charge or discharge the battery when it's hot. Always let the batteries cool down to room temp before using it/charging it.
Do not store the battery with low voltage, recharge after each use to avoid over-discharge.
Always store the battery in a dry and cool place, never expose it to heat or direct sunlight.
Recharge the battery once every 6-month, if they will be unused or stored long term.