BestDealUSA LI-70B Li-ion Battery for Olympus FE-4020 FE-4040 X-940 100% FIT SIZE and 100% BRAND NEW Rechargeable with no memory effect Integrated microchip prevents overcharging & lengthens battery life. Voltage :3.6V,Capacity : 650mAh Weight: 0.75oz, Dimension: 5.5*1.4*10.3cm