Cigarette lighter outlet for Anker Jumpstarters

Anyone used one of these to get 12 volt on the go for an Anker Jumpstarter?

Would be really useful for me but not sure if it might void the warranty.

Can’t say I have unfortunately but I wouldn’t imagine it being an issue so long as it doesn’t damage the product in any way.

This item is from - not available in US. Anybody know of another source?

All you had to do was search the same item in Amazon us
Which can be found Here