Probably most known for high-end RC batteries, Thunder Power also offers the TP103CQ 4-Port 1S 3.7V AC/DC LiPo Battery Charger for the world of ultra-micros.
In this video Jacqui from ProgressiveRC goes over things to consider when purchasing a charger and power supply for your RC needs. The videos covers things like determining wattage, charge rates, power required for parallel charging, etc.
The ISDT Q6 Plus Smart Charger is perfect for charging small LiPo batteries, like those used in ultra micro aircraft and micro quads, and can operate a long time on a 3S or higher LiPo battery.
iCharger 308Duo with charging power of 800W/30A per port or 1300W/50A with ports combined. Outstanding charger for parallel charging LiPo batteries!