Olympus PS-BLM1 BLM-1 Battery 1500mAh by Pexell High Quality Rechargeable Li-Ion replacement (non-OEM) battery made with premium Li-Ion cells These Li-Ion batteries have NO memory effect, so they can be recharged and discharged without the loss of battery's capacity Integrated micro-chip prevents overcharging 100% BRAND NEW 1 Year Warranty