Chosen Solution

Hi Have you tried a different battery? Also if it is only charging at strange angles it probably has a bad charging port I had a 3DS that had a dodgy charging port and I found that I could bypass the issue by using the dock If you don’t have a doc here’s a link to a battery and charging port Battery https://www.ebay.co.uk/itm/133870715776?… Charging port(this will require soldering) https://www.ebay.co.uk/itm/185546561468?… Here’s a disassemble guide too(this will carry you through the different repairs) Nintendo 3DS XL Power Button Replacement Hopefully this helps Any questions please ask Thanks:-)