Microtex stationary vrla opzv cells are maintenance free gel lead - acid type with long life. In applications with high requirements of operational safety and bridging times of 1 h to more than 10 h. 20 years in standby float operation at 27 °c. Maintenance free. No topping-up water during the operational life. Microtex opzv cells are maintenance free gel lead-acid type with long life. In applications with high requirements of operational safety and bridging times of 1 h to more than 10 h the microtex opzv is the right choice. Microtex stationary opzv cells are used in telecommunication sectors, for emergency lighting, for microwave radio and solar photovoltaic systems and also in power generating plants. Charging: Iu-characteristic- Imax without limitation U=2.25v/cell +/-1%, between 10 °c and 45 °c U/t= -0.003 v/k Float current: 20-30 ma/100 ah Discharge characteristics: Reference temperature: 25 °c Initial capacity: 100% Depth of discharge (dod): normally up to 80% Deep discharges: more than 80% dod or discharges beyond final discharge voltages (based on discharge rate) have to be avoided