LiPo chargers exist because charging them is complex and you have to monitor current and voltage
(and ideally temperature). But you can do it if you have a bench power supply and are prepared to
watch it. And balancing cells is a further complication if a series pack, you need to monitor every
cell's voltage.
Get a LiPo charger? Seriously, what other answer is there?
I guess I cant just plug it into an outlet.
Not unless you want to try for a Darwin award...