Sealed Lead Acid battery

Author	Message
Boppa Guru Joined: 08/11/2016 Location: Australia Posts: 814	Posted: 11:53pm 14 Aug 2018         Quote   To charge an SLA battery, a DC voltage higher than the open circuit of 2.15 volts per cell is applied to the terminals of the battery. Any of the conventional charging techniques may be used, but to obtain maximum service life and capacity, along with acceptable recharge time, constant voltage-current limited charging is recommended. During constant voltage or taper charging, the battery's current acceptance decrease as voltage and state of charge increase. The battery is fully charged once the current stabilizes at a low level for a few hours. Cycle Applications: Limit initial current to 0.20C (C is the nominal A.H. capacity of the battery). Charge until battery voltage (under charge) reaches 2.45 per cell at 68 degrees F (20 deg.C). Hold at 2.45 volts per cell until current drops to approximately 0.01C ampere. Battery is fully charged under these conditions, and charge to "float" voltage. "Float" of Stand-By Service: Hold battery across constant voltage source of 2.25 to 2.30 volts per cell continuously. When held at this voltage, the battery will seek its own current level and maintain itself in a fully charged condition. (pinched it from BatteryWholesale.com) A standard car battery charger (unless 'intelligent') is unlikely to be the best charger for a SLA battery- I found several circuits from S.C, some may be suitable, others definitely not, if larny could confirm which is the one being looked at? An unsuitable car battery charger could cause overcharging on an SLA, which at best would cause permanent capacity loss through venting at worst this