Amazon.com: Nikko 6.0 Volt NiCd Rechargeable Battery Cassette & Charger : Toys & Games
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. :
Nikko 6V Slide Slot in Battery 1262 - Etsy
Nikko 6.0v Ni-Cd battery cassette
EU NIKKO 6.0V Quick Charger 7.5V 1000mA for SCS0751000GB NI-MH Battery Pack 5059424615593 | eBay
Nikko Vaporizr 6V battery - RC Model Accessory | Alza.cz