• Increased power for high-drain devices;• Rechargeable up to 2,100x;• Precharged & ready to use;• Retains 65%-70% capacity after 5 years;• No memory effect;• Can be charged when partially drained;• Functions down to -4deg F;• AAA;• Up to 800mAh;• 4 pk; HEIGHT X LENGTH X WIDTH: 0.53 X 4.25 X 3.4 WARRANTY: ONE YEAR RETURNABLE: Yes