Nikko 6.0V Charger Model 1764B & 650mAh Ni-Cd Battery Pack | eBay
Nikko 4.8v 600mAh battery pack and charger
Make your own RC Car Battery Pack or Repair NIKKO Ni-Cd 6.0V-620mAh - YouTube
Nikko UN250279-NT 6V 600mAh NiCad Battery & AC Adaptor Charger for Nikko RC Car - Walmart.com
Just got myself 8 AAs (Rechargeable) from IKEA for my custom 9,6 V battery pack which I use for my Nikko Super Cruiser. A bit overkill when you count the capacity lol. :