Re-evaluating Diagnosis: Suspecting Charging System and Loose Alternator Belt

so folks on further inspection here I think the charging system is bad I think that the alternator is spinning enough to keep the engine running but when I hit the gas it draws too much power and that's why I'm getting a sputtering so we've got somebody coming to jump us off right now the lady in this store was nice enough to call her husband they only live a mile away he's gonna bring his truck over here we're gonna jump it off we're still gonna run the tractor supply and get our stuff but we're not gonna be able to turn the truck off so we're just gonna let the truck sit out here and purr it's got a nice full tank of gas so I don't have to worry about that but if I turn it off it's liable to not start we'll take off and we'll go to the auto parts store and have them tested battery and we'll have them also test the charging system if it's not charging properly that could be the issue and I'll show you what I think the issue is let me get the camera in closer here's what I think the issue is if I can turn this and that belt isn't turning then I've got an issue so I think the issue is that loose belt so we either need to tighten the belt replace the belt or we've got a bad charging