ade909 Posted May 13, 2014 Share Posted May 13, 2014 Hi my brother hasn't used his lipo battery in over a year I did a voltage check, it's a 3 cell lipo 11.1v. one cell measures 4volts the second cell is 8v and the 3rd cell is 12v. Is this battery safe to charge or is it toast? Thanks. Quote Link to comment Share on other sites More sharing options...
b19jas Posted May 13, 2014 Share Posted May 13, 2014 (edited) Sounds like you are adding the voltage up as opposed to checking the cells individually. By your description there it sounds like you have 4v at each cell which isnt great anyway as it should have been in storage charge at around 3.8v per cell. Do you have a charger that shows each cell as its charging? If so pop it on and watch the individual cell voltage as it starts to charge. Being at that voltage for that time it may be shot anyway. It may puff or get warm while charging though, so either watch it VERY closely or just dispose of in the correct way. Edited May 13, 2014 by b19jas Quote Link to comment Share on other sites More sharing options...
ade909 Posted May 13, 2014 Author Share Posted May 13, 2014 What I did was use the multi meter on the charge socket negative on the black and used the positive on the live, that should give me each cell voltage? I might pop it on the charger and charge it up, my brother says it must be flat to charge but not compleatly flat. Quote Link to comment Share on other sites More sharing options...
mattr Posted May 13, 2014 Share Posted May 13, 2014 (edited) my brother says it must be flat to charge but not compleatly flat. Your brother is wrong. If you totally discharge a lipo, you'll kill it. They are usually ok to discharge until you get to ~3.4v per cell. Give or take a bit. Edited May 13, 2014 by mattr Quote Link to comment Share on other sites More sharing options...
ade909 Posted May 13, 2014 Author Share Posted May 13, 2014 Sorry I was wrong the car has a set point where it cuts off at a certain voltage then it's safe to charge. Right I'm going to put it on charge now and use the safe bag and see how it goes. Quote Link to comment Share on other sites More sharing options...
mattr Posted May 13, 2014 Share Posted May 13, 2014 You can charge it whenever you want. You don't have to wait until the LVC works. Quote Link to comment Share on other sites More sharing options...
Samuran Posted May 13, 2014 Share Posted May 13, 2014 Minimum voltage for each cell on a lipo is 3.0 volts. People seem to set their LVC (in the ESC) to 3.2v and then use an alarm set to 3.4v... Read this if you havent recently...http://www.msuk-forum.co.uk/topic/21028-lipo-the-big-guide-thread-updated-march-10/ Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.