Fast dying battery


#1

We have a battery that dies (single blinking red light) whenever it gets to about 83%. It will be fully charged, but after less than 10 minutes of driving it dies and goes into the blinking mode. I have run the battery medic and the attached are the screen shots when fully charged and right after dying.
Any ideas?
20190225_153358 20190225_154417


#2

Cell 2 is not holding charge, that battery is toast, how old is it ?


#3

We just got them in January


#4

Only been used in class so far, never in a competition.


#5

4x 18650s? Shouldn’t those last 3 years and up to 500 full cycles?


#6

Our batteries lasted 8 cycles before needing to be RMAed. That number isn’t right at all.


#7

That’s my point. If those are 18-650’s they should last 3-5 years and over 500 full charge cycles from 4.2v down to 3.6v. Even more if handled well and not fully discharged.


#8

So, what can be done? We have our National tournament this weekend…


#9

This battery has a cell that’s either bad or has a very different state of charge as compared to the other three. We have some cell balancing internally but that can only handle small differences.


#10

I suppose you live with it for the competition if no one else there can loan you a battery then you contact support and RMA that battery.