How long can a UPS battery last when unplugged?

wirednuts said:

if you just unplug a ups and store it though the battery will be drained in a couple hours. and if left flat for 10 months, any type of lead acid (or any battery really) will be toasted.

and even if you did fully turn off the ups before storing it, you should plug it in every few moths to recharge the battery.... because all batteries drain themselves without load (seald lead acid batteries last longer, but if youre pushing a year your pushing too far).

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I am the last man on earth to claim any UPS expertise, but I have recently bought two of them, one made by APC, and one made by tripp-lite.

And I note there is a difference in design between the two.

On the Tripp-lite, once you shut down the power, there is no AC power to any of the eight 3 prong outlets, 4 of which are battery and surge protected, and the other 4 are omnly surge protected.

On the APC UPS, using the UPS on off switch only cuts AC power to the four 3 prong outlets that battery and surge protected, but not the four only surge protected ones.
A design I do not like. And unlike the tripp-lite UPS that arrived with the battery connected, the APC model arrived as shipped with only one connected and required the end user to connect the other terminal before use.

Which leads me to speculate, that for 10 month's, not only was our OP's UPS unplugged from wall power, the 4 only surge protected APC outlets had one or more live devices plugged into it that drained the battery dead dead and deader. Which may not have happened with a tripp-lite type design

-----------------------------------------------------------------------------------------I am the last man on earth to claim any UPS expertise, but I have recently bought two of them, one made by APC, and one made by tripp-lite.And I note there is a difference in design between the two.On the Tripp-lite, once you shut down the power, there is no AC power to any of the eight 3 prong outlets, 4 of which are battery and surge protected, and the other 4 are omnly surge protected.On the APC UPS, using the UPS on off switch only cuts AC power to the four 3 prong outlets that battery and surge protected, but not the four only surge protected ones.A design I do not like. And unlike the tripp-lite UPS that arrived with the battery connected, the APC model arrived as shipped with only one connected and required the end user to connect the other terminal before use.Which leads me to speculate, that for 10 month's, not only was our OP's UPS unplugged from wall power, the 4 only surge protected APC outlets had one or more live devices plugged into it that drained the battery dead dead and deader. Which may not have happened with a tripp-lite type design

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ME '63, DW 64, (DS 89 tents on his own, DD 92 not so much), DS 95
Premier Bullet 31 BHPR F350 Crew Cab 6.2L 3.73

I would find it too much work not to plug in the trailer, if we had load and unload the fridge for every trip it would be a pain. We plug it in in the spring and unplug it in the fall. The fridge stays on and stocked ready to go all the time. We do came 2-4 weekends a month from May through Oct. We would end up forgetting things if the fridge was unloaded. The general stuff like mayo, cheese, mustard etc stays for the year. People that are seasonal keep theirs plugged in for the year so I see no difference. Checked the battery before connecting it this season and water levels were good, never looked at it last year as it was new. Also, have used one of those cheaper 30A to 15 amp adaptors without an issue but I do not run AC, micro or anything other than lights and the 2 fridges when home.

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