Comment by oulipo2

(Gouach co-founder here) Thanks for your question! You can see the exact specs on the Gouach website here https://gouach.com/products/infinite-battery-complete-kit?va...

The battery itself is 3.3kg, so quite comparable to other models, keep in mind it comes with a sturdy aluminum casing.

What we mean by "replacing" is that you can change the cells of the battery yourself (or by asking at your local bike shop), so you don't need to trade-in the whole battery! This makes you gain time and a lot of money!