Using a bigger battery for UPS?

[boybi]

Can I use a car battery for the UPS to increase its running time when in battery mode? Can the UPS be able to charge a higher capacity battery?

[ghosthunter]

Can I use a car battery for the UPS to increase its running time when in battery mode? Can the UPS be able to charge a higher capacity battery?

Yes a UPS can charge a larger battery. But I suggest using a deep cycle storage battery instead of a car battery for this purpose if possible.

BTW the UPS will take a longer time to charge the bigger battery.

[boybi]

What's a deep cycle storage battery and where can I buy one?

[ghosthunter]

What's a deep cycle storage battery and where can I buy one?

Deep cycle storage battery is the type of lead acid battery for large scale UPS use and even in alternative power systems. I think major battery outlets would have it.

Difference? Regular car battery gets damaged if you drain nearly all the power from it. Deep cycle batteries don't get damaged.

[boybi]

Are these available in Ace Hardware or Handyman?

[kinyo]

^On malls, not the big ones (>20AH). Deep-cycle batteries are kinda specialized type and are only available from those who sell batteries for golf carts or other equipment such as motorized wheelchairs or mobile x-ray machines where high-capacity is required. In one exhibit, I saw that Motolite produces them. They are usually fully-sealed so that they can be used in any orientation, unlike "sealed" car batteries.