So I have an issue, my calculator has had its battery light charger indicator on forever until it dies, that was 4 months ago. Since then I have been constantly having to charge it when I use it since the battery lasts for 2.5 hours off a single charge, but unfortunately, the darn thing would not turn on last night. I have tried every cable, nothing works.

Now for my what I think happened was that I used the wrong wall plug which destroyed the capacitor. Any advice?