I bought 20 years ago my first 2xD-Cell Maglite batteries, for which I have now ordered these LED adapter.
I had brought the accumulator machine from the basement and put on the kitchen table with a cutter.
I had read, one would have the lamps head milling away a burr.
I got the adapter and exchanged these against the original bulb and tried my luck. But as intended without drilling for now. Lo and behold. It went without boring.
I am absolutely delighted and dazzled uh satisfied with the brightness all.
I can only recommend.