skineedog Posted July 31, 2016 Author Report Share Posted July 31, 2016 So I have a device that I don't use much and was planning on storing it so, I wanted to discharge the lipo a bit. I plugged it into the device monitor and was pulsing in 30 second, 30 watt bursts. I started to see an "imbalanced battery" message and noticed that one cell held less voltage then the other 2. I allowed the battery to balance and tried pulsing again. The same cell drops immediately much lower than the other two. When I stop pulsing, the cell in question comes back up significantly but still well below the other 2. If I allow it to continue charging, the battery will eventually balance. I have 2 other identical DNA 200 devices that do not do this which makes me think I may have a bad battery cell. These devices are my only experience with lipo batteries so excuse me if I am missing something obvious. Battery with issue is the first image. Battery without is the second. Link to comment Share on other sites More sharing options...
dwcraig1 Posted July 31, 2016 Report Share Posted July 31, 2016 Are you seeing sag like that in normal use? Link to comment Share on other sites More sharing options...
skineedog Posted July 31, 2016 Author Report Share Posted July 31, 2016 I would say yes.Even with low watts applied for 5 seconds, the cell in question drops immediately.This is image is 40 watts for 5 seconds: Link to comment Share on other sites More sharing options...
dwcraig1 Posted July 31, 2016 Report Share Posted July 31, 2016 Id say bad pack, I was thinking just not matched well perhaps but that's too much. Link to comment Share on other sites More sharing options...
skineedog Posted July 31, 2016 Author Report Share Posted July 31, 2016 I thought so too. That sucks. I barley use this device. Evolv's already replaced the board. I just got it back a week or so ago. Now the pack is bad.... Gotta find that thread about Hcigar VT200 battery alternatives... I know it's here somewhere.Thanks Link to comment Share on other sites More sharing options...
dwcraig1 Posted July 31, 2016 Report Share Posted July 31, 2016 https://forum.evolvapor.com/topic/66482-topic/?do=findComment&comment=897797The replacement is said to be better than the original. Link to comment Share on other sites More sharing options...
skineedog Posted July 31, 2016 Author Report Share Posted July 31, 2016 Just bought one from Sweetvapes... A 'true' 1300mah Zippy is being sold on eBay for about the same price but that requires Dremeling out part of the device. I don't have a Dremel and the stock battery lasts all day for me so... Thanks for your help! Link to comment Share on other sites More sharing options...
dwcraig1 Posted July 31, 2016 Report Share Posted July 31, 2016 Healthy is more important than a little mah variance. Ease of installation is a plus. Link to comment Share on other sites More sharing options...
skineedog Posted July 31, 2016 Author Report Share Posted July 31, 2016 I agree. It's just a shame that the other 2 cells are fine. I wish there was a way to revive the pack or recycle/re-purpose it. Link to comment Share on other sites More sharing options...
dwcraig1 Posted July 31, 2016 Report Share Posted July 31, 2016 Dna133? Link to comment Share on other sites More sharing options...
skineedog Posted July 31, 2016 Author Report Share Posted July 31, 2016 Meh... Maybe one day. I have 3 Hcigar VT200's & just bought an Hcigar VT75. I've been on a buying spree lately so, I shouldn't. I'll just recycle it. I love the 75 and the ability to change batteries of which I already have plenty, are cheap & are readily available locally. Link to comment Share on other sites More sharing options...
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