Chosen Solution
The battery was definitely dying but im fairly sure ive scraped off the 4 capacitors on top of the battery connector(at least 1). So now for my question: are any of these parts critical, and if so can i use small copper wire or will i need to bring it to a repair store to have the capacitors re-soldered?
Also i did this by looking at a very old mastermind child’s microscope so i might just be wrong…
Third component from left to right in the pic you enclosed is a filter and if it’s missing the rail would be interrupted and phone wouldn’t work. If you bridge it, missing connection between ends would be restablished and phone would work if that’s the only problem. That can’t be considered good practice as in case of troubles there wouldn’t be anymore a protecting filter to burn but a bridge to charger circuit components. Ultimate decision is yours. Other pictured components are capacitors, if you bridge any of those you will short the board.
