The high-endurance 18 volt XL battery with 6.0 Ah and COOLPACK technologyA further 20% increase in run-time (compared to 5.0 Ah battery) at the same sizeCOOLPACK technology for up to 100% longer lifetime (cf. battery without COOLPACK)Bosch flexible power system ? battery suitable for all tools in one voltage classWhy this tool?Extremely robust: fully functional even after a 3-m drop onto concreteBattery with practical charge level indicatorFeaturesNo self-discharge, no memory effect and a higher energy density thanks to Li-Ion battery technologyOptimal protection of the cells against excessive heat due to special, heat conductive housingVoltage 18 VoltUser-friendly thanks to cable winding functionBattery charge level indicator shows the level of remaining battery chargeBattery 100% compatible with all tools within its voltage class. Choose the XL battery for longest runtime or the compact battery for best handlingFaster charging thanks to active air cooling