I agree With Dodgy, Measuring battery voltage in no load conditions is not very informative. You need to know what the battery is doing under load to get an indication of its health. You only need one of the 4 cells to increase internal ressitance to cause the Lipo cut off to operate. See if you can borrow and test another 4 cell lipo pack and see if the problem is resolved.
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Team Gregg: Getting in the way since 2008
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