EE, the PD35 is compatible with 18650s. I intend to check into them, but hasn't ever known anyone with first hand experience with them. I'll have to check into that.
I have several LED lights that work with either 3 AAA batteries in a holder/adapter, or a single 18650 battery.
I bought four 18650 rechargeable batteries (and a recharger) and I have been very happy. They last a long time, and charge quickly.
I have not gone back to the triple AAA batteries, but it is nice to know that he option is there if I am on the road and do not have my 18650 charger with me.
John
