I’ve tried dirt devil and black and decker. I know those are the not so good brand. Any suggestion?

Folks, the President needs a break. He’s like a Black and Decker cordless Dirt Devil vacuum. If you don’t recharge his batteries, he can’t suck.

Foodsaver has like 2 million different models – what are the various features or differences between models and even brands (seal-a-meal, black and decker, etc)? What should I look for to compare different models?