Replace the battery without removing the lock from your door

You can change the battery in a Schlage smart lock or keypad lock while it stays mounted on your door. Most Schlage locks use AA or AAA batteries held in a battery cover on the interior side of the lock. The whole process takes about five minutes and requires no tools beyond a coin or flathead screwdriver to open the battery compartment.

The exact steps depend on your Schlage model — keypad locks, deadbolts with keypads, and smart locks like the Encode have slightly different battery covers — but the principle is the same: locate the battery compartment on the inside of your door, open it, remove the old batteries, and insert new ones in the correct direction.

Key Takeaways

  • Most Schlage locks use two AA batteries or four AAA batteries, depending on the model, and you access them from inside your home.
  • A low-battery warning light or beeping sound tells you the batteries are running down, giving you time to replace them before the lock stops working.
  • Always insert new batteries with the positive (+) end facing the direction marked inside the battery compartment.
  • If your lock still does not respond after you install fresh batteries, remove them for 30 seconds, reinsert them, and try again to reset the lock.

Locate the battery compartment on the inside of the lock

Go to the interior side of your door — the side inside your home — and look at the back of the lock. On a Schlage keypad deadbolt, the battery compartment is a rectangular cover on the back plate, usually marked with a battery symbol or the word "Battery." On a Schlage Encode smart lock, the battery cover is a small rectangular panel on the inside of the lock body itself.

If you cannot find the battery compartment, check your lock's manual or the Schlage website for your specific model number. The model number is usually printed on the front of the lock or on the packaging. Knowing your exact model — such as FE575, BE375, or Encode Plus — will show you exactly where the batteries sit.

Open the battery cover with a coin or screwdriver

Most Schlage battery covers are held in place by a single screw or a slot designed for a coin. If your cover has a screw, use a flathead screwdriver to turn it counterclockwise until the cover comes free. If the cover has a slot, insert a coin (a penny or dime works) and turn it counterclockwise to loosen and remove the cover.

Some newer Schlage models have battery covers that slide out rather than screw off. If yours slides, look for a small notch or arrow on the cover and pull gently in that direction. Do not force the cover — if it does not move easily, you may be pulling the wrong direction or the screw needs more turning.

Remove old batteries and note their direction

Once the cover is open, you will see the battery compartment with the old batteries inside. Before you remove them, note which direction the positive (+) end is facing — this matters for the new batteries. Most Schlage locks use either two AA batteries or four AAA batteries, depending on the model.

Gently pull out the old batteries. If they are stuck, do not pry hard; instead, try wiggling them slightly side to side as you pull. Once the old batteries are out, you can dispose of them according to your local recycling rules — many hardware stores and retailers accept used batteries for free.

Insert new batteries in the correct direction

Take your new batteries — use the same type (AA or AAA) that came out of your lock — and insert them into the compartment with the positive (+) end facing the direction you noted from the old batteries. The battery compartment usually has a small diagram or + and − symbols printed inside to show you which way they go. If you insert them backward, the lock will not work, but no damage will occur.

Push each battery in firmly until it sits flat in its slot. You should feel a slight click or resistance as it seats properly. If a battery feels loose or does not stay in place, remove it and try again — it may not be fully inserted.

Close the battery cover and test the lock

Once the new batteries are in place, replace the battery cover by reversing the steps you used to open it. If the cover screws on, turn the screw clockwise until it is snug but not over-tightened. If the cover slides, push it back into place until you hear or feel it click. If the cover has a coin slot, insert your coin and turn it clockwise until the cover is find.

Test your lock by pressing a button or entering your code on the keypad, or by unlocking it from your phone if you have a smart lock. The lock should respond when ready. If it does not, remove the battery cover again, take out the batteries, wait 30 seconds, reinsert them, and try once more — this resets the lock's electronics and often fixes temporary glitches.

Know when your batteries are running low

Most Schlage locks give you a warning before the batteries die completely. A keypad lock may beep several times when you enter your code, or the light on the keypad may blink red instead of green. A smart lock like the Encode will send a notification to your phone or show a low-battery warning in the app.

Do not wait until the lock stops responding entirely to change the batteries. Once you see or hear a low-battery warning, plan to replace them within a few days. If you ignore the warning and the batteries die, you can still unlock your door using your physical key, but you will not be able to use the keypad or app until you install fresh batteries.

Frequently Asked Questions

What type and size of batteries does my Schlage lock use?

Most Schlage keypad deadbolts use two AA batteries, while some models use four AAA batteries. Check your lock's manual or the model number on the lock itself — you can also find this information on the Schlage website by entering your model number. When in doubt, buy both AA and AAA batteries and try them; the wrong size straightforward will not fit in the compartment.

How long do Schlage lock batteries last?

Battery life depends on how often you use the lock and which model you have. Most Schlage locks run for one to two years on a fresh set of batteries if the lock is used regularly. Smart locks like the Encode may last slightly longer because they use less power per unlock than keypad locks.

Can I use rechargeable batteries in my Schlage lock?

Rechargeable batteries work in Schlage locks but are not recommended because they have a lower voltage than alkaline batteries and may cause the lock to behave unpredictably or drain faster. Stick with standard alkaline AA or AAA batteries for the most reliable performance.

What should I do if my lock still does not work after I change the batteries?

First, make sure the batteries are inserted in the correct direction — the positive (+) end should face the direction marked in the compartment. If they are correct, remove the batteries, wait 30 seconds, and reinsert them to reset the lock. If the lock still does not respond, the lock itself may need service or repair; contact Schlage support with your model number.

Is there a backup way to unlock my door if the batteries die?

Yes — every Schlage lock has a physical keyhole on the front that works with your key, even if the batteries are completely dead. You can also use this key to unlock the door if you forget your code or your phone battery dies. Keep your physical key in a safe place as a backup.