It’s a real pain in the neck when you lose a key or a combination to your padlock. Similar to a remote key fob for cars, the Noke Bluetooth Padlock solves this problem by pairing up with your Bluetooth 4.0 enabled smartphone. If your phone is within a few feet, you can unlock Noke by simply pressing the shackle. This feature would be useless if you had to worry about battery, but luckily Noke will be packed with a long-life battery that will last over a year with normal use and a few years if used infrequently.