Enclosed Battery Box (8 x AA) – 12V PORTABLE POWER PACK | EL Wire Craft
Starlight-eight Aa Battery Box 12v Battery Holder Black Fully Sealed With Switch With Wire Can Hold 8 Aa Batteries, With Dc Male (12v) | Fruugo UK
Stud Battery Holder 8x AA (12V) | The Pi Hut
12 volt power 8 x AA battery holder case with 2.1mm x 5.5mm DC Plug and bare wire end connectors 12V | for CCTV, DIY, Arduinos, motors, solenoids, LED strips (8AA): Amazon.co.uk: