I lost the charger for my osmo+ battery and didn't have time to wait for a charger to come in the mail so I went out and bought an osmo mobile to use as a super overpriced battery charger until the amazon order comes in. I just wanted to know if I can charge the battery in the Osmo+ with the USB cable, or if I have to charge the batteries in the Osmo Mobile? I don't want to risk plugging the USB into the Osmo+ and damaging it somehow if the internals of the handle aren't the same.

Cable can only be used to charge Osmo Mobile, please put the battery in Osmo Mobile and then charge with cable.
The port in Osmo+ is not used to charge but insert external microphone.