Features: Ready to use: low self-discharge D/R20 rechargeable Ni-MH battery. No Memory Effects - Ni-MH cells does not require draining before a charge. Very long life time and can be charged up to 1000 times. Higher Current Capabilities - ideal for high drain applications. High quality D size 11000mAh high capacity nickel-metal hydride(Ni-MH) rechargeable batteries. Longer and more consistent runtime. Compatible with all chargers that support Ni-MH rechargeable batteries. Can be rapidly charged with smart chargers and universal chargers.