# Haven't needed to add water in 40 charges - What Gives?
**URL:** https://community.electricforum.com/t/havent-needed-to-add-water-in-40-charges-what-gives/474
**Category:** EV Small Talk
**Created:** [November 28, 2007, 10:26pm UTC](https://community.electricforum.com/t/havent-needed-to-add-water-in-40-charges-what-gives/474 "2007-11-28T22:26:53Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@sam62](https://community.electricforum.com/u/sam62)
#### Post date: [November 28, 2007, 10:26pm UTC](https://community.electricforum.com/t/havent-needed-to-add-water-in-40-charges-what-gives/474/1 "2007-11-28T22:26:53Z")
I have a GEM 2002 with an unmodified zoran charger. I bought new batteries in Feb 07 and I charge them about once a week. I check the water each month and the batteries haven’t used any. I hear light bubbling when they are charging but it seems to me that they should have had to been watered by now. Is this normal? thanks
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### Author:  [@Houseoffubar](https://community.electricforum.com/u/Houseoffubar)
#### Post date: [December 8, 2007, 3:04pm UTC](https://community.electricforum.com/t/havent-needed-to-add-water-in-40-charges-what-gives/474/2 "2007-12-08T15:04:26Z")
Sam62, I am no expert where charging is concerned, but I have read other comments about this, and the concensis seems to be that the batteries are not being charged fully, if they are not losing some water. A fully charged 12 battery should see 14.4volts before being considered fully charged. After charging, the battery should drop to 12.9-13.6v If you are not reaching this, you should increase the charge voltage.
The voltages I mentioned change a bit with temperature, and should be considered for a mild day. Temperature extremes will change this a volt or two. Hope this helps, Eric
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### Author:  [@sam62](https://community.electricforum.com/u/sam62)
#### Post date: [December 13, 2007, 11:16am UTC](https://community.electricforum.com/t/havent-needed-to-add-water-in-40-charges-what-gives/474/3 "2007-12-13T11:16:26Z")
Thanks for your reply. The 6 batteries show 13.3 to 13.4 after charging and after a load 12.7 to 12.8 . No water has been added bought in 02/07, the water is at the top and it bubbles slowly when being charged by the 72v charger. Is that still an indication of being undercharged?
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### Author:  [@Houseoffubar](https://community.electricforum.com/u/Houseoffubar)
#### Post date: [December 13, 2007, 4:21pm UTC](https://community.electricforum.com/t/havent-needed-to-add-water-in-40-charges-what-gives/474/4 "2007-12-13T16:21:46Z")
I don’t know what to think, It sure sounds like everything is right where it needs to be. I would just use the time you aren’t using to water batteries, and polish your Gem. Eric