Fenix LD01 with an IMR 10440 inside is a good sleeper. pocket light cannon
There have been many many threads on this topic, please use the Google search function for 'LD01 10440' for that.I have an LD01 as well using an eneloop. i read the manual and the working voltage says up to 1.7. i googled 10440 and it says 3.7V. i am a battery noob so i am confused. how is it not fried? does the brightness/runtime gains increase by a lot with the IMR 10440? Thanks.