lipo question
 

I forgot the lipo alarm connected to the battery and it eventually drained the battery to death.
I managed to recharge, now the battery works fine.
But I have cell1: 3,86V cell2: 3,86V cell3: 4,26V.
Should I be concerned about this difference or just continue to use it as long as it works?

get a balancer and fix that.

You should be balance charging every time you charge LiPo. Has the pack gone puffy during charging? Some higher end chargers have a specific LiPo recovery mode, if you have it use it. If not balance charge again and if you see the same voltage in the packs chuck it or use it to power a winding mag.

wait define dead? did you use it til it wouldn't pull back the spring anymore or just till the ROF started to slow (I define lipos as dead at this point and switch out right away)

If your battery was "dead" and you managed to charge it without it venting, you can still use it. When it comes to LiPo's exploding, the only times they don't do it while your charging it is if you puncture the pack or have too much drain on it.
And buy a balance charger as soon as you can.