They look like “plastic” rhino ramps. I’ve seen them at Walmart and harbor freight has a generic off brand version

I domt know about lasting a lifetime......I had one replaced 8 months into warranty.....no problem. THe replacement died about 6 months later.......they wouldn't replace that one though, only offered me a discount code towards my next purchase.....but yea, I actually came here wondering if there was a way to replace the battery haha Cause yea mine just stopped charging

Now where's the battery/...? LOL