The Mirka® Intelligent Li-ion battery offers precise capacity measurement through its coulomb counter technology. Equipped with Bluetooth connectivity and the myMirka® Dashboard, effortlessly track battery health and available capacity. Monitor individual cell voltage for enhanced battery lifespan and prolonged usage time. Additionally, firmware upgrades are conveniently accessible via Bluetooth connection with the sander/polisher. Featuring 11.1V and 2.5Ah capacity with 3 cells, charging time is approximately 45 minutes.