# Sealed lead acid batteries in parallel- amp hours? **URL:** \ **Category:** Factual Questions\ **Created:** [March 14, 2012, 12:45am UTC](https://boards.straightdope.com/t/sealed-lead-acid-batteries-in-parallel-amp-hours/615705 "2012-03-14T00:45:55Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![Rysdad](https://avatars.discourse-cdn.com/v4/letter/r/7cd45c/32.png) [@Rysdad](https://boards.straightdope.com/u/Rysdad)\ **Post date:** [March 14, 2012, 2:24am UTC](https://boards.straightdope.com/t/sealed-lead-acid-batteries-in-parallel-amp-hours/615705/6 "2012-03-14T02:24:16Z")
> [@Why I don't like religious tracts](https://boards.straightdope.com/t/why-i-dont-like-religious-tracts/74203/57): > > It’s generally not a good idea to parallel batteries, though. They won’t necessarily share the load evenly, since even the slightest difference will cause one battery to supply more or less current than the others. If one battery dies (or gets a damaged cell) then the other batteries will constantly try to charge it, so a single failure may take the other two batteries down with it. I guess I understand the concern, but I could check them with my meter periodically just to make sure. It’s not like they’re going to be moved around a lot or anything. I mean, I have to rely on _something_, and I have a couple of generators as well. Maybe I’ll have backups for my backups. 🙂 --- _[View the full topic](https://boards.straightdope.com/t/sealed-lead-acid-batteries-in-parallel-amp-hours/615705)._