I was just doing random stuff on my phone and went to click a button near the top right of the screen, and was mildly horrified to see "1%", so I immediately put it into the charger, where the phone promptly started showing "0%" for the next ~30 seconds. The phone never died.
Has this happened to any of you?
Yeah, more amps being drawn will cause a larger voltage drop. I got to play around with this with my old vapes that had DNA chips. The software suite allows you to generate battery profiles by discharging the battery over an hour or so at different wattages to get the discharge curve. I even built my own resistor group on a heat sink to run the tests (4x heavy duty 1ohm resistors in parallel)