August Smart Lock Battery Critical Error: How to Fix It
Easy 5-10 minutes High Severity
Verified June 2026
- Error Code
- Battery Critical
- Brand
- August
- Product Type
- smart_lock
- Severity
- High
- DIY Difficulty
- Easy
- Estimated Fix Time
- 5-10 minutes
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How to Fix Error Code Battery Critical
-
Check Current Battery Level
-
Gather Replacement Batteries
-
Remove Old Batteries
Remove batteries quickly to avoid losing your lock settings. If batteries are completely dead, you may need to recalibrate the lock after replacement. -
Install New Batteries
-
Replace Battery Cover and Test
-
Verify App Connection
-
Test All Functions
Parts You May Need
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
AA Alkaline Batteries (4-pack)
Check Price on Amazon
AA Lithium Batteries (4-pack)
Check Price on Amazon
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When to Call a Professional
Contact August support if the lock doesn't respond after battery replacement, if you're completely locked out and can't access the interior battery compartment, or if the lock mechanism appears damaged or jammed.Frequently Asked Questions
How long do August Smart Lock batteries last?
August Smart Lock batteries typically last 6-12 months depending on usage frequency, WiFi connectivity strength, and battery type. Heavy usage and weak WiFi signals drain batteries faster.
Can I use rechargeable batteries in my August Smart Lock?
While rechargeable batteries work, August recommends high-quality alkaline or lithium AA batteries for optimal performance and longer life. Rechargeable batteries may provide less consistent power output.
What happens if my August Smart Lock batteries die completely?
If batteries die completely, you can still unlock the door using a physical key. The lock will lose its settings and may need recalibration after battery replacement, but programmed access codes are usually retained.
Why does my August Smart Lock drain batteries quickly?
Fast battery drain is often caused by weak WiFi signal, frequent usage, extreme temperatures, or using low-quality batteries. Moving your WiFi router closer or using a WiFi extender can help extend battery life.
How can I prevent getting the Battery Critical error?
Enable battery notifications in the August app to get alerts when batteries reach 20% and 10%. Replace batteries proactively when they reach 20% to avoid unexpected lockouts.