Meet the eGeeTouch: a Bluetooth + NFC padlock designed for outdoor use. It can be unlocked and tracked with an iOS/Android device and Apple Watch. You can see who and when access was made on your smartphone.
This lock has a waterproof corrosion resistant design. It can withstand temperatures form -4 to 140F. The eGeeTouch lasts 7000 lock/unlock cycles on a full charge. You can find out more about it here.