Been trying to consider how to replace my 2D Maglite battery powered to a modern Lithium 28650 – 5000mah.
2D Cells was 2X1.5V=3V total
2X 28650 Batteries give 2X4.2V=8.4V at full charge, dropping to around 7.6V when flat.
Had to replace the led bulb with a new one, made a couple of battery holders to keep the Lithium cells in the middle of the torchlight, used a 3 X 8mm disk magnets to connect everything together and then had to make a new end cap spring to accomodate for the new length of the batteries.
It all works and it is substantially brighter than the previous setup.
