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Changing batteries

The Latch M's 6 AA batteries should last 12 months under normal usage using 6 x AA Duracell non-rechargeable batteries. Managing them is simple. Just follow these steps.


Reading battery life

View device battery life using the Latch Manager or Manager App. 

Battery life is refreshed every time a device is updated. If a device hasn't been updated for a while, the reported battery life could be out-of-date. If a battery hasn't been read for more than a month, it'll be reported as 'unknown', and you'll need to update the device to get a reading.

If your device is wire powered, you will only get a battery life reading when the device is disconnected from power. 

What batteries do I buy?

  • 6 x AA non-rechargeable alkaline batteries
  • Never mix old and new batteries. If you're replacing batteries, replace ALL the batteries with new ones of the same brand. Mixing can cause battery failure.


Changing batteries

  1. Remove the Latch M's back cover
  2. Replace the 6 AA batteries with AA non-rechargeable alkaline batteries
  3. Important: Replace ALL 6 AA batteries with new batteries of the same brand. Mixing and matching new and old batteries can cause battery failure and reduced battery life
  4. Update the device (Important: failing to update the device after battery replacement can result in unreliable functionality). How do I update a device?