Can I charge the 2019 battery with the 5V3A charger set?
Yes, you could charge the 2019 battery with the 5V3A charger set, but it won’t enable the 2019 battery to be charged any faster than charging with the 5V2A charger, which equally takes 8 hours for a full charge. Only when the 5V3A charger is applied to the mini 5K battery, can it reach fast-charging of 4 hours for a full charge.
5200 mAh Battery (2019)
Mini 5K Battery (2021 NEW)