https://mrbatteries.co.uk/blogs/news/mr-b-and-sparky-what-is-a-battery 2026-09-23T21:39:57+01:00 weekly https://cdn.shopify.com/s/files/1/0781/5364/6415/articles/Screenshot_2026-09-23_at_21.39.24.png?v=1790195997 Mr B and Sparky what is a Battery ?