The Oregon outdoor power equipment battery delivers enough power to complete most jobs. Featuring 40 volt lithium-ion cell technology, this battery runs a long time and can be recharged up to 1,000 times with Oregon's standard or rapid chargers. Even after several months in storage, the battery still has a charge. This 4.0 Ah battery has over 1.5 times the capacity of the 2.6 Ah battery pack. This powers all of Oregon 40V Max tools, a line of powerful, emissions-free outdoor power equipment for all of your yard care needs.