Bosch 2607336816 18V 4.0Ah Li-ion "Coolpack"Battery

Efficient Bosch cooling technology in and around the battery prevents heat damage and gives up to 65% longer run-time and up to 100% longer lifetime compared to other battery packs
4.0Ah CoolPack cells have finer 'windings' than 3.0Ah allowing more power density ('fuel (Ah)) in the same pack size and less electrical resistance (so more fuel efficient)
Less frequent battery charges
4.0Ah batteries are fully charged in just 45 minutes when using the AL1860CV charger
Electronic coding for tools and chargers
High power contacts with silver coating
Capacity indicator with 3 LEDs
Red CoolPack housing made of heat conductive material
In-built temperature sensor
Large and ergonomic release button
Robust slide-in interface
Robust housing
High quality Li-Ion cells with highest capacity