The only bad thing is it will come from China. It will be a few weeks to get it unless you can source another seller. Search for "800mAh 3p 7.4v usb charger".
That 1330 is on the battery right?
Basically, you want a charger with an output at or less than that of the battery. So 800mAh will...
Here ya go. Not for sure, but looks right?
https://www.ebay.com/itm/2S-7-4V-2S-800mA-Lithium-Battery-Charger-USB-Cable-SM3P-positive-plug-for-RC-Toy-/264871586546?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0
Actually, this is the exact same connector as my son's RC...
Pics of the battery and connector would help. If nothing else, you could swap the connector on the truck and battery to something more common like a Deans, XT30, etc. Then you could by a cheap RC battery charger to charge it.