The extremely compact and ultra-slim design of the Li-40B rechargeable battery makes storage and transportation convenient. With a capacity of 660mAh, the new Li-Ion battery for the Optio W30, Coolpix S210, S510, S520, S600 and Stylus 850SW allows hundreds of images to be shot before the battery needs to be recharged. This high-capacity rechargeable lithium ion battery has more power than the original manufacturers included battery. It features Lithium technology, which ensures maximum battery life and maximum power. It also features No Memory Effect that lets you recharge partially drained batteries without reducing performance.