Having a backup battery for your phone is extremely useful. Most methods out there though are something you either need to plug into with a cable, or will make your phone so bulky that it no longer wants to fit in your pocket. While these work just fine, that doesn’t sit so well with everyone.

The Case-Sticky-On Removeable External Battery for iPhone 5 will give you a very simple case that has a magnetic backing that you can ‘stick’ the battery to. This keeps the profile of your phone slim, but will still have all the charging power you need. It can act as a case and charge the iPhone 5, but will only charge the iPad 4, Mini, iPod Touch (5th gen) and iPod Nano (7th gen). When you need it, simply stick it on and plug in your phone. No needing to change out cases or fiddle with cables in the abyss of your bag. It’s a $47 purchase that is completely unnecessary if you already have a backup method of charging your phone.