14500 to 18650 battery adapter

I designed this to charge a 14500 cell (vapcell H10) with an xtar PB2S charger while traveling.

The positive contact is a 16mm M3 screw.

Of course charging a liion battery with too much current can be dangerous and since the PB2S doesn't support setting the charging current it's better to power the PB2S with a 1A USB power brick or even lower if available.