So I have a battery which I believe to be an 18650, and I've been leaving it to charge for about 5 hours now and I go pop it in my vape and get one weak hit off it. My question is, who is at fault? The battery or charger?
Btw I think it might be the charger because it is some random cheapy chinese one but idk... Need some expert opinion..
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Could be fake batteries. You should google the make (should be printed on it) and check if you haven't.