A battery checker is Ok not a fail safe when addressing a potentially damaged lipo. it will show you the cells voltage but not give you a good or bad info on a battery sure some new era chargers can show ir but that again is not a fool proof way. your nose is best if it smells sweet trash it...
sometimes the female male brass tabs that plug into female end will be a few fractions of a inch more.the little fail tabs can also loosen and need a slight re-bend there's many tips and tricks to this hobby.but be safe 1st if you ever have a lipo miss hap it can hurt persons or property bad..
1st off you never use metal tool to get a battery free..more than likely its toast... remove from house and dispose of it asap. only thing you cab do is test rc to make sure no other damage is done..Deans also T plugs can be tad hard to unplug .when I used Deans I went with the xt plug they...