Buy a Pila charger with the 15mm spacers... Had mine for over 2+ years and batteries come off at 4.19 volts every time...
The Pila will charge all 3.7 volt batteries form 10440 to 26650........ To charge the a 18350 with a Pila you will need 15mm spacers. (SuperT has them)
The trustfire multicharger should charge the 18350 without any spacers....