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yes a 5ah battery is a longer working battery than a 4ah so it is actually better than the 4ah
Yes, it mAh or Ah is how long the battery lasts, it does not affect performance.
yes, the 5ah battery will last 5/3 longer than the 3ah battery.
Yes, both batteries perform the same, but the 7ah battery holds more charge.
12V 5Ah
Its a 12 Volt System. The Standard battery is 4Ah
I'll answer my own question since no one answered it. I replaced the 2 pcs. 12v 4.5ah battery w/ 2pcs. 12v 4ah battery. It seems alright since it is now working fine for at least 2 months w/ 1 PC connected to the UPS. What I'm concerned though is that the UPS will overcharge the batteries since the replacements have a lower ah rating. --------------------------------------------------------------------------------------------- The charging will be fine - it is how long the UPS will run for (if you mains cuts out) that has been affected by your replacement.
http://www.batteryinternational.com/lantern-battery.html is a good site to find replacement batteries specifically for lanters. Otherwise you can call 1-877-28-BATTERY and they can help you find the battery you are looking for.
Since the voltage is the same, I would expect that not much charge would be transferred. Normally, for a 24 V battery, you would need a HIGHER voltage to charge it.
Ah means Ampere hours. A 4 Ah battery can release 4 amps for one hour, or 1 amp for 4 hours, or 0.5 amps for 8 hours, or 8 amps for 0.5 hours.
If you need a battery then there is nothing that can replace it.
Energy = 4Ah x 3600 seconds x 12 volts = 172,800 Joules