iSDT Smart Charger from Bangood
iSDT SC-608 150W 8A MINI Smart LCD Battery Balance Charger (1057271) US$38.99
This charger will charge battery to battery, from 12 volt car outlet, from a external power supply, plus other combos.
For me, a lightweight battery charger for traveling.
https://youtu.be/X5RCjHcQ67U
