This Bosch 18 volt lithium-ion battery pack is compatible with the entire Bosch 18 volt ‘Power4All’ range. The 18 volt ‘Power4All’ is the cordless system with lithium-ion technology for an entire family of Bosch tools in the house and garden. A single 18 volt battery fits all the compact tools in the system. The powerful 18 volt battery is powered by lithium-ion and protected by Bosch Electronic Cell Protection, to ensure that users are never slowed by a weak battery. The lithium-ion technology means the tool is always ready to use. They suffer from no self-discharge and no memory effect. The Bosch Electronic Cell Protection helps ensure extra-long life of the battery. It protects the battery from overheating, overload and self-discharge.