8.4V 5000mAh Model Control Battery Pack - Vapextech NiMH
8.4V 1600 Bulldog Airsoft Block Battery - Just BB Guns
WASAGA 18650 Battery Pack Case, 5V USB 8.4V DC Waterproof Outdoor Power Bank Perfect for Cycling, Fishing, Camping, Climbing Power Backup (Black 8.4V 4pcs Battery) : Amazon.co.uk: Sports & Outdoors
Lithium Battery Charger AC Power Adapter 8.4v 1amp 1000 mAh UK Plug Bicycle Cycle Bike Head Light Torch : Amazon.co.uk: Sports & Outdoors
2pack 8.4V Airsoft Battery 1600mAh NiMH Battery Pack with Mini Tamiya Connector for Airsoft AK47 MP5K RPK PKM CYMA GR8: Amazon.co.uk: Sports & Outdoors