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.