Chosen Solution
Hello, I replaced the battery on my iPhone SE a few months ago. After doing a screen replacement a fortnight ago, I have encountered a few issues. When dropped, the phone will randomly restart every few minutes for no reason. This is fixed by disconnecting the battery for a few minutes. Yesterday, I began to notice that my battery is draining very fast, even on standby. According to the battery settings, it will last 3hrs on a full charge. The battery health is very high, but it is definitely draining quickly. Any thoughts? Should I replace the battery? The logic board is not damaged in any way near the connector. Edit: The phone will also overheat when not doing anything. A reset has not helped.
Your replacement screen may be causing an excess current draw. Did the replacement screen come with the front camera and sensor flex pre-installed? Those can have lower quality flexes. If the replacement came with the front camera pre-installed and you still have the original screen, I would re-install the original just to see if the problem is reproduced. That would tell you that you have an issue with the replacement screen. You could then try just the screen without the front cam flex to see if the problem is limited to that or if it is more screen/backlight related.
