USB has no protection, period. I.E. high voltage into the USB ports , NO PROBLEM. Charging a vape that has an IMR 18650 battery via USB is just asking for trouble.Why again USB has zero protection. With the NiteCore Chargers you have under voltage, over voltage, short etc etc protection that you don't get with plain USB. Charging with USB is an afterthought not a design concept. The posted NiteCore USB Charger works because it moves the intelligence to the charger, NOT the USB port. It is constantly monitoring all aspects of the charged battery and adjusting accordingly. What happened in this case is thermal run away. The battery was overcharged via USB because USB is not designed for charging. When he went to take a draw off the e-cig he drew a hefty current and the battery failed.
Biting the hand that feeds IT
