Battery charging should only be done under supervision. Lithiums should only be changed/discharged under supervision and in a fireproof container or setting.
Digital charger for your Ni Starter or glow driver. Plug Digital Glow Charger into your field box or 12VDC source and plug your glow driver into charger. Hit start button and glow driver battery is charged at 1000mAh rate with peak detection. Automatically drops to trickle when glow driver battery is full.
 "Maxx Flying Digital Glow Igniter Charger")