# Nimh Battery packs in parallel...guidance? Or talk me out of it...

**URL:** <https://forum.arduino.cc/t/nimh-battery-packs-in-parallel-guidance-or-talk-me-out-of-it/447857>\
**Category:** General Electronics\
**Created:** [March 27, 2017, 3:02pm UTC](https://forum.arduino.cc/t/nimh-battery-packs-in-parallel-guidance-or-talk-me-out-of-it/447857 "2017-03-27T15:02:20Z")\
**Posts on this page:** 1\
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**Author:** ![John\_Rae](https://avatars.discourse-cdn.com/v4/letter/j/53a042/32.png) [@John\_Rae](https://forum.arduino.cc/u/John_Rae)\
**Post date:** [March 27, 2017, 5:51pm UTC](https://forum.arduino.cc/t/nimh-battery-packs-in-parallel-guidance-or-talk-me-out-of-it/447857/3 "2017-03-27T17:51:20Z")

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Batteries placed in parallel should have the following characteristics :

a) Be from the same manufacturer

b) Be of the same age

c) Be of the same Ah capacity

d) Be of the same rated voltage

e) Be of the same actual voltage

f) Be of identical past work-load

After you have assured yourself that (a) to (f) have been followed then there is a reasonable chance you can safely place them in parallel.

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