# 12 volt battery 

**URL:** <https://community.electricforum.com/t/12-volt-battery/26855>\
**Category:** GEM Forum\
**Created:** [August 27, 2023, 9:37pm UTC](https://community.electricforum.com/t/12-volt-battery/26855 "2023-08-27T21:37:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tbone](https://avatars.discourse-cdn.com/v4/letter/t/3ab097/32.png) [@Tbone](https://community.electricforum.com/u/Tbone)\
**Post date:** [August 27, 2023, 9:37pm UTC](https://community.electricforum.com/t/12-volt-battery/26855/1 "2023-08-27T21:37:26Z")

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I have a 2016 e4. The 12 volt battery keeps going dead. Did it come with this battery? Can I just bypass it? Any suggestions?

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**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\
**Post date:** [August 27, 2023, 10:48pm UTC](https://community.electricforum.com/t/12-volt-battery/26855/2 "2023-08-27T22:48:54Z")

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To the best of my knowledge the 12V aux battery is required.

You can replace it with a lithium battery for about $30, see Michael’s thread:

> [@The "mini me" under dash battery for 2016+](https://community.electricforum.com/t/the-mini-me-under-dash-battery-for-2016/26076):
>
> My flooded Gem sat for 5 months before I could get to it’s rebuild. In that time the new lead under dash battery went dead. Well that is just unacceptable. No bms to protect my $30 lead battery, well we will fix that. Plus I’m LG so the fact I had a LEAD battery in my Gem was blasphemy. So I ordered a lithium replacement. For the fun of it decided to try a small one and see how it works. This is a 6ah lfp from Amazon. $23. cheaper than the lead replacement. This is mini me. guessing it weighs m…