How to Fit Protected LiIon in 2D Mag

I've finally got some protected D LiIons from KD.

I've tried to put them in my 2D mag (MC-E, 2S2P), and even with a shorty spring from KD, there is no where near enough room to screw the tailcap on.

Has anyone come up with a solution? I've previously tried to compress the spring and weld a couple of the coils togther, but only managed to ruin the spring.

I've had a good search on CPF, hoping someone would be selling extenders, but with no luck.

The protected D LiIons are 66.5mm, compared to a standard D Ni-MH at 61.5mm.

Many thanks...

Paul

Hope this helps, https://www.candlepowerforums.com/threads/206419

Instead of welding the spring, why not cut it to the appropriate length? Thats what most modders here do.

Thanks Sam, that is just what I was looking for.

I had thought about cutting the spring, but I can't see how the contact would be made between the battery and the tail cap. Sorry if I'm being dumb, but if anyone has a photo of what they have done to the spring, I would be extremely grateful.

Cheers.

Paul

I cut the first about 2 coils off of the top. That worked for me.

Im using a 4d with KD protected D cells, I just cut the spring

4D is pretty big. I don't know if the spring cut trick will work. You may have to cut it a lot or bend it.

Yeah, I cut the spring. It works

you can put the spring into the tailcap. works like sharm.

markus

Here is an example to what i did to my spring.

For just 5mm longer than a normal battery pack i would not extend my m@g!
My battery pack even goes into the tailcap!

ktafil said:

Here is an example to what i did to my spring.

For just 5mm longer than a normal battery pack i would not extend my m@g!
My battery pack even goes into the tailcap!

Click to expand...

Yes, but your battery pack isn't D cells in a D Mag, so you can do that -- you can't stick D cells down in a D tailcap without boring it perilously thin. Fortunately, there's plenty of room just by shortening the spring, but leaving it in a "normal" configuration.

Benson said:

Yes, but your battery pack isn't D cells in a D Mag, so you can do that -- you can't stick D cells down in a D tailcap without boring it perilously thin. Fortunately, there's plenty of room just by shortening the spring, but leaving it in a "normal" configuration.

Click to expand...

True, it's just an example of how to mod a spring...
His cells are just 5mm longer than standard so they will not stick out of the m@g.

I cut the bottom coils off and ground off the anodizing inside the tail cap and it fits great. I just finished me build today after 3 months of waiting for KD to ship those 32650 D(ish) cells

I often remove the ano and set the spring in the bottom of the tail piece when needed.

The new KD protected D cells are almost a quarter of an inch longer than the old KD cells were at least the ones I received today are.

Dave