Battery saver is not calculating the life properly
Battery saver (the built-in function I assume) isn't what you think it does. All this does is slow the clock speeds of the CPU and destroys background processes to save as much battery as possible below 10-15%. It doesn't actually save battery it saves processing power to keep it going for a little longer.
Battery saver only underclocks the cpu and gpu. Decreases brightness. And shuts off some background services. It just gives a vague idea of how long your phone will last based on your last usage.. It wil never be accurate.
Shot on OnePlus December 2020 - Red
by Shivang Joshi, 2020-12-01