You might also be interested in these 8.4 v rechargeable battery pack.
Baxxtar MaxProtect BLX-1 2400 mAh battery pack with NTC sensor and class V1 protective housing - charging with PD-MaxPerformance USB (1500 mA) 161713, compatible with OM-System OM-1
Baxxtar
£ 76.72
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PATONA Protect BLX-1 Battery-Pack (2400mAh) with NTC Sensor and V1 Housing - with PD Performance USB-C Charger 161713 (max. 1500 mA)
PATONA
£ 77.45
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kelingdun 2pcs 5000mAh 7.4V Lithium Polymer Batteries.Rechargeable Li-Polymer Batteries for Heated Gloves, Socks,and Jackets, Ideal for Skiing,Fishing,and Winter Sports. Female DC Jack Compatibility.
kelingdun
£ 42.06
free shipping
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DSTE® EN-EL3E Rechargeable Li-ion Battery + DC11U Travel and Car Charger Adapter for Nikon D30 D50 D70 D70S D90 D80 D100 D200 D300 D300S D700 Digital SLR Camera
DSTE
£ 18.99
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7% off
Nimh/Nicd Rechargeable Battery Charger 2.4V 3.6V 4.8V 6V 7.2V 8.4V 9.6V 10.8V 12V for 2-10S RC Car with Standard Tamiya/Mini Tamiya SM-2P JST XH Futaba Connector
ENEWSTAR
£ 13.99
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JJoias Compatible For 8.4V AA Rechargeable Battery Pack 2400mah AA Cell For RC Car Helicopter Toys LED Light Cordless Phone SM Plug
Compatible Model Numbers: for 8.4V AA rechargeable Battery pack 2400mah AA cell for RC Car helicopter toys led light cordless phone SM plug
£ 25.75
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Fuworance 2.4V-12V Nimh Multi-Charger Nimh/Nicd Rechargeable RC Battery Packs Smart Charger for 2-10s RC Cars Airsoft Drone with Tamiya, Mini Tamiya, JST, SM 2P, XH, Futaba Connectors 500-800mA
Fuworance
£ 17.99
free shipping
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8.4V Rechargeable Battery Pack For Bicycle Lights & Headlamps IPX7 Battery Replacement 2 X 18650 Batteries Housing Case Holder Box Bracket Stand Shelf Storage Container Pack Cover Organizer Bag Pouch
Sbshiouu
£ 13.49
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YYALYYON Waterproof 18650 Battery Pack for Power Tools, 8.4V Rechargeable Lithium Battery with DC Output, USB Charging Port, Power Display, High Discharge Performance, Extended Bat
1. Optimized Design: Enhanced 18650 8.4V lithium battery pack with waterproof feature for reliable performance in various conditions.