Key Findings USB-C rechargeable batteries have built-in battery charger and voltage converter electronics They deliver a constant 1.5V output, unlike NiMH batteries that have a varying voltage Measured capacities are significantly lower than advertised, with round-trip efficiencies around 63-72% They have some advantages like a flat discharge curve and no leakage, but also disadvantages like abrupt voltage drop and electrical noise These batteries cannot negotiate power with
