Electronics 01
Why Phone Charging Slows After 80%: The CC-CV Curve
Fast charging fills a phone from 0 to 70% at full current, then a fixed voltage limit makes the current taper. The physics, the plating risk and the math.
batteries
Electronics 02
LiPo C Rating Explained: Current, Sag and Real Limits
A 5000 mAh 50C LiPo is rated for 250 A, but at 3 milliohms per cell that current sags each cell by 0.75 V. What the C rating means and how to check it.