Amazon is selling a 'lightweight' $160 magnetic portable charger for $29, and shoppers say it 'charges efficiently'

TheStreet aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. It's happened to all of us — you take out your phone to look at maps or take a photo, but as soon as you press the button, it doesn't turn on. You forgot to charge it…