Instruct: Classify Amazon reviews into positive or negative sentiment
Query: These batteries leaked for me

My mag charger flashlight was working well a month ago, but today I tried it and it was dead. Put it on the AC charger, as usual, but after 8 hours it was hot (the flashlights body) so I tried the light (still charging), and nothing happened. Upon opening the tailcap, white powder dumped out, and the insides are totally corroded. Thankfully it didn't start a fire or explode. The flashlight is useless now. This was my second battery I've had but it leaked badly.ps - I always charged it for at least 12 hours, and this battery was obtained directly from mag instruments.