Single Cell Lithium Ion Charger 4.2v 500ma
If you need a cheap charger for single cells this is a great option. We tested a lot of these and they all worked as they should and it gets the job done.
Keep in mind these are cheap chargers ($1.00) so you should use these in a safe place. Never charge unprotected batteries unattended. Also you should put the battery in the slot before plugging it in.
Works with 18650, 18350, 16340, 14500, and 14000 size batteries.
It's a simple, bare bones charger. Has reverse polarity protection if you put the battery in backwards. It's what you would expect from a $1 charger.