Recharging Disposable Batteries
9 January 2023
It was a relatively well known practice in WW2 (and possibly before) that if your torch/flashlight battery was getting a little flat, a few quick touches to a vehicle battery would restore a fair bit of charge. This information became more public knowledge in the UK, post WW2 when times were tough, and a number of articles were published on it. I cannot now find any, but the earliest article I have read was a 1953 one in "Wireless World" by R W Hallows with some designs and an analysis of these simple methods.