Amazon.com : Replacement for Konica Minolta DiMAGE A2 Battery and Charger with Car Plug and EU Adapter - Compatible with Konica Minolta NP-400 Digital Camera Batteries and Chargers (1600mAh 7.4V Lithium-Ion) :
Power supply for car cigarette lighter 1.5-12 VDC at 2A - Cablematic