Morning, TH, I've got a OME single I'm not using, I looked on Yuneec Skins site, surprisingly he doesn't have one.
Normally he'[s my "Go To" guy for anything for either of my drones.
There is a mass of charger for LiPo on the market. You can use any of them. You need a EC3 supply cable which is often included.
Charger must have a 'storage' program and balancer.