Charger will charge up to 4s lipos. Charger has safety shutoff and balance port. Plug it in and charge - easy as that.

Battery and charger is from a DJI Phantom drone, but it works great for starter boxes. You don’t have to carry a big charger or go through menus to setup the battery, so it’s extremely easy to use.

Lipo specs: 2200 mah, 11.1v (3s), 20c
charger specs: Lipo and life packs, up to 4s, up to 3 amp charging,

$35 shipped CONUS