August Smart Lock Battery Draining Fast? Causes and Fixes

Quick answer

Most fast battery drain on an August lock comes from Wi-Fi staying active, a misaligned DoorSense magnet, or weak or mismatched batteries. Start by replacing all four batteries at once with fresh alkaline cells, confirm DoorSense is aligned, and check your app's auto-lock and remote monitoring settings. If the lock still drains in under a month, the lock or bridge may need service or replacement.

A smart lock that dies every few weeks is not just annoying. It means keyless entry stops working when you need it most, and you may be replacing batteries more often than the lock's design intends. The good news is that most cases of an August smart lock battery draining fast trace back to a small number of fixable causes.

This guide separates the symptom you notice from the likely cause and the corrective action. It also tells you when to stop troubleshooting and consider a different setup, so you are not stuck in a cycle of swapping batteries without solving the problem.

Symptom: batteries die in days or weeks instead of months

August locks are designed to run for months on a set of alkaline batteries, so a lock that dies in days or weeks is signaling something abnormal. The most common pattern is a lock that reports low battery shortly after you replace the cells, or one that drains faster after you enable a new feature in the app. Before you blame the lock itself, rule out the simple causes first.

Battery quality matters more than most people expect. Mixing old and new cells, or using rechargeable batteries that run at a lower voltage, can make the lock report low battery early and behave unpredictably. Always replace all four batteries at the same time with fresh, name-brand alkaline cells.

• Replace all four batteries at once, never one or two.
• Use fresh alkaline batteries, not rechargeable or off-brand cells.
• Note the date you installed them so you can measure real battery life.

Likely cause: Wi-Fi and remote features keep the radio awake

Wi-Fi is the single biggest drain on a smart lock. When your lock maintains a constant Wi-Fi connection for remote monitoring and control, it uses far more power than a lock that only wakes for Bluetooth commands. This is why a smart lock Wi-Fi battery drain issue often appears right after setup or after you turn on remote access.

If you use an August Wi-Fi Smart Lock, the Wi-Fi radio is built in. If you use a lock with an August Connect Wi-Fi Bridge, the bridge handles the network connection and the lock itself can stay in a lower-power state. That difference matters when you are trying to extend battery life without giving up remote access.

• Turn off remote monitoring if you do not need it daily.
• Check the app for auto-lock and auto-unlock settings that keep the lock active.
• If you need remote access, consider a bundle with a Connect bridge to offload Wi-Fi.

Likely cause: DoorSense is misaligned or the door is not closing cleanly

DoorSense tells the lock whether the door is open or closed. If the magnet and sensor are misaligned, or if the door swells and does not close fully, the lock may keep checking the door state and drain the battery. This is one of the most overlooked causes of smart lock batteries dying quickly, and it is easy to test.

Open and close the door several times and watch the app's door status. If it flickers between open and closed, or never settles, the sensor needs adjustment. A door that rubs or sticks can also force the lock to work harder on every auto-lock cycle.

• Confirm the DoorSense magnet is within the marked alignment range.
• Watch the app status while opening and closing the door.
• Fix sticking doors or loose hinges before replacing the lock.

Corrective action: a simple reset and settings check

After you install fresh batteries, take five minutes to review the settings that affect power. Disable features you do not use, such as continuous remote monitoring, and shorten the auto-lock delay only if you actually need a faster lock. Then recalibrate the lock and DoorSense through the app so the lock is not guessing about door position.

If you have a keypad, remember that code entry itself is low power, but a keypad that stays lit or responds to every touch can add up. Keep the keypad clean and avoid pressing keys repeatedly. If the lock still drains quickly after these steps, the issue is likely hardware or firmware, not your settings.

• Recalibrate the lock and DoorSense after replacing batteries.
• Turn off unused remote or auto-unlock features.
• Check for firmware updates in the August app.

When to stop troubleshooting and choose another option

If you have replaced batteries with fresh alkalines, aligned DoorSense, and trimmed remote features, and the lock still dies in under a month, stop replacing batteries. At that point the lock may have a hardware fault, or your usage pattern may simply not suit a Wi-Fi-heavy lock. A bundle that includes a Connect bridge can move the network load off the lock and extend battery life.

If remote access is not essential, a Bluetooth-only setup or a lock with a keypad gives you keyless entry with far less power draw. The goal is to match the lock to how you actually use the door, not to keep feeding it batteries.

• If drain continues after two fresh battery sets, contact support or replace the lock.
• Consider a Connect bridge bundle if you need Wi-Fi but want longer battery life.
• Choose a keypad-based lock if you mainly need code entry, not remote monitoring.

Battery drain diagnosis checklist

• Batteries die within days of replacement: Check that all four cells are fresh, same brand, and alkaline. Rechargeable batteries run at lower voltage and often trigger false low-battery alerts. If fresh alkalines still die in days, move to the next check.
• Drain started after enabling remote access: Wi-Fi and remote monitoring keep the radio active. Turn off remote features you do not use, or move to a bundle with a Connect bridge to offload Wi-Fi. If you need remote access, a bridge-based bundle is the better long-term fix.
• Door status flickers or auto-lock runs constantly: Misaligned DoorSense or a sticking door makes the lock work harder. Realign the sensor and fix door fit before replacing anything. If alignment and settings are correct and drain continues, the lock likely needs service or replacement.

August locks and bundles that affect battery life

• August Wi-Fi Smart Lock + Keypad: This Wi-Fi Smart Lock simplifies everyday life with keyless entry, virtual keys, auto-lock and unlock, remote monitoring and control with the August App, and it is bundled with the Smart Keypad for convenient code entry. Built-in Wi-Fi enables remote features but is the main battery drain, so use the keypad for everyday entry and turn off remote monitoring when you do not need it.
• August Wi-Fi Smart Lock + Connect with Keypad: This bundle comes with an additional Connect Wi-Fi bridge for extended battery life. The Connect bridge handles the Wi-Fi connection, which can reduce drain on the lock itself compared with relying on the lock's built-in Wi-Fi.
• August Smart Lock + Connect + Keypad: This exclusive bundle includes an August Smart Lock, August Connect Wi-Fi Bridge, and the August Smart Keypad, and works with Alexa and the Google Assistant. A separate bridge plus keypad gives you remote access and code entry while keeping the lock's own radio workload lower than a Wi-Fi-native lock.

Fast battery drain is usually a settings, alignment, or battery-quality issue, not a sign that smart locks are inherently unreliable. Work through the diagnosis in order, and if two fresh sets of alkalines still vanish in weeks, switch to a bridge-based bundle or a keypad-focused lock that matches how you use your door.