heat-shrink tubing

[mark.hinds]

Looking for a brand of thin (!!) heat-shrink tubing, to contain a pair of Nm-Hi batteries:https://www.aliexpress.us/item/2251832689810470.html?spm=a2g0o.order_detail.order_detail_item.3.6a09f19cr5IrdJ&gatewayAdapt=glo2usa

The actual product looks like the image at the above link, except that it comes encased in an additional layer of the thin green heat-shrink.  The electrical leads are too thick and too rigid for the confined space into which they need to go, so I need to remove the outer layer of heat-shrink (not pictured), replace the existing electrical leads with thinner, more flexible wire, and cover the whole thing with new heat-shrink. 

Any suggestions would be appreciated.  Most heat-shrink I have access to seems to be too thick, especially after it has been shrunk, and the space it needs to go in is very tight (a Japanese electronic toy tank). 

MH

[Lemosteam]

Maybe hot glue the two batteries together and then wrap them with 1/2" Kapton tape.  If the batteries get too hot then maybe some JB weld in between with Kapton around the outside?

[peteski]

Maybe hot glue the two batteries together and then wrap them with 1/2" Kapton tape.  If the batteries get too hot then maybe some JB weld in between with Kapton around the outside?

Kapton tape and the silicone adhesive on it are designed to operate at very high temps. How high? Melting solder temperatures.  When I worked as a electronic technician in a production area where we used to use wave soldering machine on the assembly line to flow solder over all the components, we used Kapton tape to cover gold pads of an edge connector to mask them from liquid solder.  To me there would be no need for JB Weld.

I'm also interested in finding the type of thin heat shrink material (tubing) used to wrap rechargeable batteries.

[Sumner]

Haven't bought or used the following but a Google search for 'Ultra Thin Wall Polyolefin Heat Shrink Tubing' lead to this....

https://www.electricalhub.com/catalogsearch/result/?q=Polyolefin+Thin+Wall+&x=16&y=18

Not sure how thin 'thin' is.

Sumner

[rodsup9000]

    When I was building battery packs for our 20.3 railroad, I bought all the supplies from "Battery Space"     Here is the shrink wrap page
  https://www.batteryspace.com/PVC-Heat-Shrink-Wrap-Tube.aspx