Charger for all Li-Ion batteries from 10.8 - 12 Volt Features Bosch flexible Power System - Battery suitable for all devices 10.8v - 12v Very compact ECP (Electronic Cell Protection): Tool electronics talk to battery electronics No deep discharge. No overheating. No overload. Up to 400% lifetime Bosch Lithium-ion batteries have greater life spans than their Ni-MH or Ni-Cad counterparts giving 400% greater run time