METABO LiPOWER battery pack 18 V - 4.0 Ah

Intelligent battery management for durable battery packs with a 3-year warranty
Patented ‘AIR COOLED’ charging technology
Permanent electronic monitoring of individual cells (ESCP) during charging for a very long service life
Processor-controlled charging and discharging management.
Capacity indicator for checking the charge status
Can be stored for long periods with virtually no self-discharge
Many brands, one battery system: this battery pack is interchangeable with all 18 V machines and chargers from the CAS brands: www.cordless-alliance-system.com