Should a batteries life last longer?

[speedfreek67]

Sometimes the insulator is reusable, but they are usually just very thin plastic that can easily split and is easily lost (I never found one that I blew away with the hairdryer!). The fogstar insulators are a lot stronger and are self adhesive, meaning they don't get lost when you replace the wrap.

I would get a pack of 50 insulators from fogstar, enough to last years, for £1.75

https://www.fogstar.co.uk/collections/accessories/products/18650-insulators-100