The thing is, I don't want to see any of you guy's spend £50 on something that is misleading in a way.
They say they can be used on kettles, hair driers and TV's all these are power hungry, now it probably would boil a kettle as its a converter into mains A/C, it would probably dry your hair, but that's all you'll get out of one fully charged battery.
They make it sound like you can run these items for as long as you like. Just a little selling technique they have.
I'm not knocking them, just don't expect them to deliver wonders for you.