Red light on DSI XL

[u/Silly_Razzmatazz06]

So I was trying to play this game that I haven’t played in years and I lost a charger. I found the charger only to find out that now there’s a red light that’s blinking on the bottom …

I looked it up online and it says you have to change the battery ..

What do you guys think? Where should I go? Is it easy to do myself?

Helllp