Thanks for your feedback
They are 1100mha batteries for 1/18th scale. I used a charger that has a little nob that you rotate to change the amp level from 1 to 4 amps and i didn't check it prior to charging. I'm hoping it false peaked and am aware that 1100's shouldn't be charged at more than 1 amp.
I've just discharged the battery as much as i can and am charging it at 0.2 amps with as low a peak detection that I can to see if it charges better as a once off, the will resume normal charging in the future if so.
This all happened after the first charge... If I had chaged the battery once at 4 amps (worst case scenario) would that destroy the battery?