One can buy UPS batteries from his/her nearest computer retails. They provide good qualities of UPS batteries on a fair price. You can also refer to the official website of ApexBatteries and BatterySpec.
with the batteries
Only the active EMGs require batteries. EMG also manufactures passive pick-ups which do not require batteries.
Batteries. You need them to generate the power.
Amazon has several APC UPS batteries for sale for around $20.00 each. You can also buy APC UPS batteries at your local battery supply store. To find a list of these stores in your area check your local yellow pages.
Amazon offers certain APC batteries for sale at discounted prices and free shipping. Also, Batteryplex offers APC batteries that power backup systems and other UPS replacement batteries.
That would depend heavily on whether you're talking about wristwatch 'button' batteries, automotive storage batteries, or telephone central office UPS batteries.
An (UPS) Uninterruptible power supply
Thousands of types of several chemical make-ups from many manufacturers.
The number of 12V batteries required for a 10 kVA UPS depends on the battery capacity and the desired runtime. Typically, a 10 kVA UPS might require a battery bank that can provide sufficient power, often calculated in amp-hours (Ah). If you consider a common configuration with 12V batteries, you would generally need multiple batteries in series and parallel to achieve the necessary voltage (usually 48V) and capacity. For instance, using four 12V batteries in series gives you 48V, and you would need to determine the total Ah required to meet your runtime needs to calculate the total number of batteries.
Well unless you mistyped something 500kva is 500,000 watts. That would be 41,666 12 volt batteries!
UPS battery systems are used by companies in order to save them from down times of brown or black outs. These are batteries which will save on these types of situations.
UPS's recharge the batteries during normal power. The recharge current will make the batteries temperature rise some.