Originally Posted by
davidad
I used foil on a p-60 module I got from DX and it drew over 3.3 amps on a fresh battery. With the foil the 502B body I installed it in got so hot I couldn't touch it. The modes quit qorking after a 15 minute run and before I returned it it wouldn't stay lit.
That means the foil is doing it's job as it's transferring the heat from the drop-in to the host. The quality of DX drop-ins is a whole different matter. I stopped buying them a few years ago when I had the LED literally fall of a brand new drop-in. The best drop-ins I've bought are from CPF member Nailbender. He makes some quite nice ones.