18650 current draw?

[Flo1]

Being fairly new to this, I have some questions about current draw and protection circuits for 18650 cells..

Does a protection pcb limit current draw in a cell compared to a similar unprotected cell given the same operating parameters?

Basically I want to build a light running 4 XR-E R2's (2S-2P config) driven at 1.4A (3 mode 2.8A KD driver).. The battery will be separate from the light head (a-la canister style dive light).

As there are so many brands of cells, can anyone recommend cells suitable for the above scenario.

Are IMR cells worth the expense?

Cheers.

 

[lctorana]

Does a protection pcb limit current draw in a cell compared to a similar unprotected cell given the same operating parameters?

Yes. There is a definite maximum cutoff current.

As there are so many brands of cells, can anyone recommend cells suitable for the above scenario.

Just my own opinion, but I'd use 4 of either AW's P18650-26 or AW's IMR 26500. But take a look in the Dive light subforum, there may be specific underwater battery recommendatinos for all I know.

Are IMR cells worth the expense?

Actually, they're cheaper than the equivalent protected LiCo cell.

 

[jerry i h]

I have AW's 18650 protected. I have been using it to power EL's EDC-P7 (it goes direct drive); I get about 45 minutes of light before it starts to dim. It works like a champ. Do not remember how many amps it pulls, but I am sure someone can calculate the current draw.