[Septillion] and [Hugatry] have come up with a hack to manipulate a USB charger into becoming a variable voltage source. Their project QC2Control works with chargers that employ Quick Charge 2.0 ...

Reference current and voltage source is used to supply any analog blocks. It is based on the reference voltage source forming temperature compensation voltage and two voltage-to-current converters.

The battery management system allows automatic power redistribution when a cell overheats or shuts down. Higher voltage cells ...