Bosfa Industrial battery Alkaline battery series is equipped with a regulated valve to keep its pressure in a suitable limit, it also prevents the electrolyte from absorbing the CO2 in the air. This ensures the battery not need to replace the electrolyte during the operation. The battery is characterized with long life, strong construction, low self-discharge, wide operating temperatures , high reliabilities and resistance to over change and discharge. The batterys maintenance interval may be 1-4 years at the various float charge voltages.