Olympus Li-30B Lithium Ion Battery Pack OLI30B The extremely compact and ultra-slim design of the Olympus Li-30B rechargeable battery makes storage and transportation very convenient. With a capacity of 645mAh, the new Li-Ion battery for the µ-mini DIGITAL allows hundreds of images to be shot before the battery needs to be recharged. OLYMPUS Li30B IS COMPATIBLE WITH: Olympus mju MINI series