Battery sleeve?

chnzwh · Jan 26, 2012

Hi there, I'm thinking of getting a bored SF M2 body for 18650 battery while keep the capability to deploy 123A batteries. I came across delrin battery sleeve for 123A and it seems that this will fulfill my need. However, one concern I have is about heatsinking. Batteries will get hot after certain amount of run time. In stock format, the heat can dissipate directly through the host body. But what happen if I use battery sleeve? Will battery sleeve lower the efficiency of battery heatsinking?

Thanks :)

BIGLOU · Jan 26, 2012

I use these small diameter rubber bands my wife uses on my daughter hair. The pack has hundreds, plus these do not wear and tear. These work great and I have never had any problems. Some people also recommed rolling the battery in paper (i.e. a post-it sheet), but this works great. You can get these a any beauty supply store, Wally Mart or Target. They prevent rattling and add some type of shock absorbtion. I put one at each end but you can put as many as you want. GL

Stephen Wallace · Jan 26, 2012

Once you bore out the tube, you would greatly reduce contact between the battery and tube anyway, so heat conduction between the batteries and the light is minimal.

Admittedly, minimal contact between the batteries and tube is better than actually placing the batteries in an insulating tube, but there are several manufacturers that use these tubes to stop CR123As rattling in a tube sized for 18650s, and it doesn't seem to be a problem.

Tana · Jan 26, 2012

You should never thing about cooling down your hot batteries... rather figure out what causes that so you replace them with proper ones... either branded and proven CR123's or Li-Ion's capable of delivering currents to the LED that driver is dictating...

I've been using sleeves for a while now, custom made from paper and paper-glue... But delring custom bored ones are definitely tougher if you plan to take them in and out all the time...

ElectronGuru · Jan 26, 2012

From an evaluation standpoint, there are two sources of heat. [Over]driving the cells under load and heat from an LED transferring to the heatsink, then to the body, then to the cells. When the LED is the source of heat, insulating the cells keeps them cooler.

Stephen Wallace · Jan 27, 2012

^^^
Good point.

HotWire · Jan 27, 2012

I've used rubber, plastic and recycled cardboard. No problems of any kind. I've never noticed any increase in temperature when removing the batteries. I prefer rubber because it is quiet. But whatever you choose, don't worry about heat.