# Dicharge test on a 72v pack of group 31 Gel batteries
**URL:** https://community.electricforum.com/t/dicharge-test-on-a-72v-pack-of-group-31-gel-batteries/15394
**Category:** Battery & Chargers
**Created:** [February 7, 2019, 10:15pm UTC](https://community.electricforum.com/t/dicharge-test-on-a-72v-pack-of-group-31-gel-batteries/15394 "2019-02-07T22:15:54Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@cleanvehiclesgb](https://community.electricforum.com/u/cleanvehiclesgb)
#### Post date: [February 7, 2019, 10:15pm UTC](https://community.electricforum.com/t/dicharge-test-on-a-72v-pack-of-group-31-gel-batteries/15394/1 "2019-02-07T22:15:54Z")
Recenly installed 6 12v Ultra Power Gel group 31 batteries in a 2009 GEM. Can anyone tell us how many minutes on a Lester 72v discharger you should get out of a new pack of 6 12v group 31 gel batteries? Thank you.
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### Author:  [@Gem\_e2](https://community.electricforum.com/u/Gem_e2)
#### Post date: [February 8, 2019, 5:08pm UTC](https://community.electricforum.com/t/dicharge-test-on-a-72v-pack-of-group-31-gel-batteries/15394/2 "2019-02-08T17:08:02Z")
Hi
you need 15-20 charge on new batteries before they get full power
51 MIN @ 75A for a good battery with Lester
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### Author:  [@cleanvehiclesgb](https://community.electricforum.com/u/cleanvehiclesgb)
#### Post date: [February 8, 2019, 7:48pm UTC](https://community.electricforum.com/t/dicharge-test-on-a-72v-pack-of-group-31-gel-batteries/15394/3 "2019-02-08T19:48:13Z")
Thanks for the info. The batteries do have 15-20 cycles already and only achieve 30 minutes @ 75A to the 63V level. Looks like I am sending the batteries back. Thanks again.