Yuasa NP2.3-12
Sealed Rechargeable Lead-Acid Battery

		Nominal Voltage 12V Nominal Capacity 20 hour rate of 115mA to 10.5V 10 hour rate of 210mA to 10.5V 5 hour rate of 380mA to 10.2V 1 hour rate of 1.3A to 9.60V 2.3Ah 2.1Ah 1.9Ah 1.38Ah Shelf Life ( 20°C ) 1 month 3 months 6 months 97% 91% 85% Life Expectancy Standby Use Discharge by 100% Discharge by 50% Discharge by 30% 3 to 5 years 250 cycles 550 cycles 1200 cycles Charging ( Cyclic Use ) Charging Voltage Maximum Charging Current 14.4V to 15.0V 580mA Charging ( Standby Use ) Float Charging Voltage 13.5V to 13.8V Construction Sealed construction; can be operated, charged or stored in any position without leakage. Further Information www.yuasainc.com Sealed Lead-Acid Batteries Most information available about lead-acid batteries refers to car and bike batteries and is not directly applicable to the sort of batteries which are used in burglar alarms, emergency lighting systems or uninterruptable powers supplies ( UPS's ). The most important difference is when it comes to recharging the batteries. Car and bike batteries are pretty sturdy beasts and can quite easily handle being charged at 4 Amperes and perhaps more, these smaller batteries need to be charged at a much lower current and connecting them to a car or bike battery charger will damage the battery, possibly causing it to catch fire or even explode ... Warning Do not connect sealed lead-acid batteries to a car or bike battery charger They may catch fire, explode and can kill To charge a sealed lead-acid battery you need to use a constant voltage charger which has current limiting. As a rule of thumb a 12V battery should be charged at around 14.5V when in cyclic use, around 13.5V when in standby use and the current should be limited to less than 10% of its Current Capacity; for example, a 12V 1.0Ah battery used cyclicly might be charged at 14.5V at 100mA. Note that these are rules of thumb only ... Manufacturer's data must always be obtained before charging any particular battery and charging must be done in accordance with the limits specified.
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First published sometime before Monday the 10th of April, 2000 Last upload was on Saturday the 28th of August, 2004 at 02:31:06