Ex-Factory Price / AGM Lead Acid Battery 24V3.5ah Battery for UPS, Emergency Lighting

Sealed/Maintenance-Free
The valve regulated spill proof construction allows trouble-free safe operation in any position. There is no need to add electrolyte, as gases generated during the charge phase are recombined in a unique "oxygen cycle".

Long Shelf Life
A low self-discharge rate, up to approximately 3% per month, may allow storage of fully charged batteries for up to 6 months, depending on storage temperatures, before charging becomes critical.

Low Pressure Valve Regulators
All batteries feature a series of low pressure one-way relief valves. These valves safely release any excessive accumulation of gas inside the battery and then reseal.

High Discharge Rate
Low internal resistance allows discharge currents of up to 20 times the rated capacity of the battery. Relatively small batteries may thus be specified in applications requiring high peak currents.

Wide Operating Temperature Range
Batteries may be discharged over a temperature range of -20° C to +60° C (-4° F to + 140° F) and charged at temperatures ranging from -10° C to +60° C (14° F to +140° F).
Rugged Construction
The high impact resistant battery case is made of nonconductive ABS plastic. The case materials impart great resistance to shock, vibration, chemicals and heat. Flame Retardant (FR) battery cases and lids are available where the end application dictates.
Long Service Life
Have a design life of up to five years in standby applications. In cyclical applications up to 1, 000 charge/discharge cycles can be expected depending on average depth of discharge.

Are your Batteries Bad?
Batteries may still read the proper voltage with a volt meter when under charge or off charge even when they are bad. To properly test a battery it should be done with either a load on it or by using battery-testing equipment.
Batteries used in most standby equipment such as UPS systems, emergency lighting, alarm systems, etc. Will have a low voltage disconnect (LVD) that will disconnect the battery from being discharged below 87.5% of nominal voltage.
Example; 12 Volt Battery X 87.5% = 10.5 volts therefore a 12V battery will stop discharging at 10.5 volts. This also applies to strings in series.
Example; 4-12V batteries in series will produce 48 Volts. 48 X 87.5% =42V This string will be disconnected from the circuit from the LVD at 42V.
Never replace a partial string of batteries! This is not an old wives tale, it's true! When you put new batteries in a string with old batteries they will take on the characteristics of the older batteries and will require replacement much sooner and cost more in the long run. The charger will see the string as a single battery and older batteries may cause over or under charging of the new batteries causing premature failure. It will also cause the equipment to be less reliable.