Bosch BAT620 18-Volt Lithium-Ion 4.0Ah Battery with Digital Fuel Gauge
Unique CoolPack design feautures special heat conductive housing and ribbing that pulls heat away from the battery, keeping it cooler; giving you up 2x the battery life and 65-percent more run time compared to existing 3.0Ah batteries. State-of-the-art 4.0Ah Lithium-Ion battery technology plus the Bosch exclusive Electronic Cell Protection (ECP) system guarantees optimal tool and battery performance even in tough work conditions.