1. Brand new and high quality
2. World wide voltage input
3. Constant voltage and current for charging
4. Not charge when the battery positive and negative is reverse
5. Charging for flat cylinder lithium batteries (18650 / 17670/ 18490 / 17500 / 16340 / 17335 / 14430 / 14500 / 10440 etc)
6. Repairing the low-voltage battery
7. Trickle charging function, to ensure that the battery is in saturated.