large image

Trusted Reviews is supported by its audience. If you purchase through links on our site, we may earn a commission. Learn more.

Master Lock Smart Outdoor Padlock Review


rating-star rating-star rating-star rating-star rating-star
Trusted Reviews Recommended


  • Tamper alerts and access logging
  • Easy Bluetooth unlocking
  • Very rugged
  • Multiple users


  • Directional backup code is tricky to remember
  • Pricey

Key Specifications

  • Review Price: £79.99
  • Bluetooth unlocking via app (iOS/Android)
  • Weatherproof
  • Directional backup code
  • Replaceable CR2 battery

What is the Master Lock Smart Outdoor Padlock?

The name probably tells you what to expect: this is a padlock that can be unlocked via Bluetooth from an app on your phone. That means loads of people can be given the power to pop it open, and not a single one needs to remember a key or combination.

The Smart Outdoor Padlock is also weatherproofed, and since it’s made by one of the world’s biggest names in lock-making, you can be sure it’s tough as old nails – nails that were pretty tough even before they were old and have since been sent on an extreme boot camp involving swims in an icy lake, just to toughen them up some more.

A smaller indoor version is available, if you don’t need all that ruggedness.

Related: Best smart security cameras

Master Lock Smart Outdoor Padlock – Design and features

This is a fair old chunk of lock – but you’d expect that, since it’s meant for outdoor use. The boron-alloy shackle’s thickness is around 9mm, which is pretty chubby, so obviously check that it’ll fit where you need it. The hasp-and-shackle fastening on one of my sheds was too small to attach it directly, but it was fine on the larger shed and on my greenhouse.

Vertical clearance from the top of the lock body to the shackle is 51mm and horizontal clearance is 23mm, so as long as you can accommodate the girth, there’s plenty of versatility for use with a variety of hasps and chains.

Weatherproofing of the lock’s body means its rubberised, with the bottom half of the rubber housing sliding off for access to the battery compartment. Within is a replaceable CR2 battery, but there’s also a battery jump built into the bottom, so a 9V battery can be attached to give temporary access if the CR2 dies.

On the front is a directional pad with a central button that’s lit by a multi-coloured LED.

Master Lock Smart Outdoor Padlock – Performance

With the Master Lock Vault eLocks app downloaded, setting the Smart Outdoor Padlock up is fairly straightforward. You do need to register an account, though, and you’ll need the code from the instruction sheet. Probably best to tuck that away safely somewhere in case you need it again.

Once you’ve added the lock to your list in the app, things get even simpler. If you’re within Bluetooth range of the padlock, you can touch any button on the padlock to unlock it. The front LED goes green and, click, you’re in. Lovely.

Ah, but what if you don’t want just anyone to be able to unlock it while you happen to be near? You can activate Locker Mode, which stops it being accessible until the mode’s disabled or you open it via the directional code that comes supplied with the padlock.

Speaking of which, the directional code is on the instruction sheet – another reason to make sure you don’t chuck that out – and it’s rather long and complex. It has to be, of course, but, frankly, it’s impossible to remember. Luckily it can be changed from within the app, so obviously you’ll be setting it to your favourite combo move from Street Fighter II, right?

Adding a guest who can also be allowed to unlock the Smart Outdoor Padlock is similarly easy through the app, letting you add them straight from your contacts or by entering their name and email address. They obviously need to download the app and register, but that’s it.

The app also logs access history, so you’ll know who’s been unlocking it and when, and you’ll get tamper alerts if someone’s trying to jimmy it open. If you have GPS enabled on your phone when you unlock the padlock, the location will even be logged. Most usefully of all, of course, it warns you when the battery is getting low.

Battery life is claimed to be at least two years, but there’s that back-up battery jump if you need it.

All in all, the experience is very slick, and I’ve never once had any hiccups. Despite being outside in the wind, rain and sun for weeks, the padlock also still looks as good as new.

Why buy the Master Lock Smart Outdoor Padlock?

If you need a really rugged, secure padlock that needs to be accessed by multiple people, or just opened regularly, this makes life so very easy. It’s also built to Master Lock’s market-leading high standards, so you don’t have to worry about its toughness – and since the company’s been around since 1921, there’s a decent chance the software will be supported for years to come.

The only real downside is the steep price. However, you’re paying for convenience as well as potentially saving money on getting keys cut.


A super-rugged outdoor padlock that’s perfect for multiple-user access.

Trusted Score

rating-star rating-star rating-star rating-star rating-star

Why trust our journalism?

Founded in 2004, Trusted Reviews exists to give our readers thorough, unbiased and independent advice on what to buy.

Today, we have millions of users a month from around the world, and assess more than 1,000 products a year.

author icon

Editorial independence

Editorial independence means being able to give an unbiased verdict about a product or company, with the avoidance of conflicts of interest. To ensure this is possible, every member of the editorial staff follows a clear code of conduct.

author icon

Professional conduct

We also expect our journalists to follow clear ethical standards in their work. Our staff members must strive for honesty and accuracy in everything they do. We follow the IPSO Editors’ code of practice to underpin these standards.