I went to sell this electric scooter my kids had outgrown and it wouldn't run so I replaced the batteries. Don't forget that the old ones need to be recycled.

The batteries I used (12V/7Ah) looks like they are out of stock on Amazon but the same company makes a 12V/9Ah version (i.e., longerlasting): https://amzn.to/368Axk8

12V/7Ah batteries: https://amzn.to/3v942uI

Battery connectors at Lowes: https://www.lowes.com/pd/IDEAL12Cou...