A decent charger will save you a fortune in potential airframe breaks
I want to explain how a good quality charger will one day save your model. If you're expecting an explanation of how batteries work then you'll be disappointed, as I tend to commit to memory only the facts that I need to know. I don't need to know about the chemical reactions within battery cells, but I do need to know how to look after them properly and what signs to observe in their charging / conditioning process.
TERMINAL REASONING
Batteries are funny old things, and I reckon that more models are lost through battery failure than anything else.