Fully-sealed rechargeable battery. Supplied complete with 240v charger, and 12v charger, which connect into an external plug on the handle unit. The NiMH battery is resistant to memory, and over-charging, and should last 500 cycles. A red light indicates charging and a green light indicates charging is complete. A full charge from flat will take 8-10 hours. Weight 600gm. *nil Shaft NB: For optimum battery life, run fully flat occasionally, and try not to continually over-charge.