5 Best Batteries for Smart Locks in 2024

One of the most important considerations for those who want to purchase a smart lock is battery life. Many people just don’t want electrical wiring stretched to their front doors. They’d rather want smart locks that rely on batteries for power.

We’ll talk about the different variables that affect battery life, but one thing is for sure: you’ll want to know the most feasible option in terms of battery life.

We’ve put together a list of the five best batteries for smart locks available in the market. Also, these are the most commonly used batteries for smart locks.

Last update on 2023-10-15 / Affiliate links / Images from Amazon Product Advertising API

Best Batteries for Smart Lock

Duracell – CopperTop AA Alkaline Batteries

Duracell – CopperTop AA Alkaline Batteries For Smart Locks


Over 40 years ago, it was Duracell that pioneered the electrochemical system of Alkaline Manganese Dioxide. This is why it became a popular choice among consumer electronics manufacturers all around the world.

The Duracell CopperTop AA Alkaline batteries are engineered to deliver the power you need for your smart lock. Long-lasting and dependable, these batteries come with a 10-year guarantee in storage. Besides offering tremendous power to your smart locks, they protect the device from damaging leaks.


  • Long-lasting
  • Reliable brand
  • 10-year guarantee in storage


  • Battery defects can damage your smart lock device


Energizer AAA Batteries

Energizer AAA Batteries For Smart Locks

These batteries are part of the Energizer MAX family. Innovative and long-lasting, they can hold power for up to ten years while in storage, allowing you to use them when required.

Fully-used batteries are often subject to major leakages, but these batteries are designed to prevent any leakage for up to 2 years. Energizer offers to replace any of your smart lock damaged due to battery leakage either during its life or during the two years following the full use of the batteries.

The Energizer AAA Batteries cover the two major concerns for smart lock batteries: durability and device protection.

In case the exact smart lock device isn’t available at that time, another smart lock of comparable market value can be claimed. However, you’ll have to submit both the damaged device and leaking battery to Energizer, and your claim may be denied by the company if it believes that the evidence is insufficient.


  • Well-known brand
  • The battery leak for up to 2 years after full use
  • Offers to replace device damaged due to leakage


  • Can leak or explode causing injury if mixed with used or other types of batteries.
  • Leakages after two years of full-use aren’t covered by guarantees


Rayovac AA Batteries

Rayovac AA Batteries

These alkaline AA batteries are ideal for use in smart locks. To ensure reliability, they are tested twice before shipping to customers.

The Rayovac AA Batteries, in particular, comprise of a max capacity can that ensures safety in storing and delivering maximum power, as well as power rings to guarantee consistency in performance.

They are long-lasting, capable of preventing damaging leaks and come with a money-back guarantee in case of poor performance. Given that the brand is now owned by the highly reliable Energizer Company, you can expect even greater performance.

Also, the Rayovac AA Batteries come in a pack of 72.


  • Consistent performance
  • Money-back guarantee
  • Ensures safety in power storage and delivery


  • Users report a short life span for the batteries


VONIKO 9V Batteries

VONIKO 9V Batteries

Voniko 9V batteries are designed to meet the quality and performance standards seen in leading brands. If your lifestyle centers on technology, Voniko 9V Batteries are ideal for you. Using state-of-the-art technology, it delivers well on application, power, and satisfaction. These premium-grade alkaline batteries are 6 to 9 times better than carbon batteries.

With at least six times more power, you will have to replace your smart lock batteries less often. With a 7-year life in storage, you can save batteries for longer periods. This also means you can buy them in bulk to save secure some discount on purchases.

Besides, the Voniko 9V Batteries boast being 100 percent leakproof. If you’ve been using smart locks for a while, you must be aware of the problem of battery leaks. Voniko is the single brand that seems to have been able to overcome this problem.

Its patented double-barrier leak protection comes to the rescue of your smart lock. They come with a dual-layer complete isolation leak protection feature. The super-powerful feature prevents any chances of damage to your smart lock. This also means you don’t have to worry about the toxic and disgusting corrosion that occurs to other batteries.

Also, it is among the few smart lock batteries that are environment-friendly. Free from deadly chemicals such as cadmium and mercury, these batteries pose little to no danger to the environment upon disposal.


  • High-tech batteries using state-of-the-art technology
  • 6 to 9 times more reliable than carbon batteries
  • 7-year shelf storage
  • 100 percent leakproof
  • Environment-friendly batteries


  • No warranty offered


ACDelco AA Super Alkaline Batteries

ACDelco AA Super Alkaline Batteries

These batteries make use of sophisticated technology to serve smart locks. They’re pre-coated with stainless steel, which prevents leaks, and the batteries comprise advanced ingredient formation that sustains power for longer periods. They come in a storage pack of 40 AA alkaline batteries, making a smart choice for your deadbolt.


  • Trusted national brand
  • Long life
  • Mercury or cadmium-free
  • No leaks when stored in a cool, dry place


  • No warranty offered


Valuable Information on Smart Lock Batteries


What are the Different Variables Affecting Battery Life

When it comes to consuming battery life, connection integrations prove to be the biggest culprits.

While other variables also exist, Wi-Fi, Bluetooth, Z-Wave, and Zigbee are the most common connection integrations affecting battery life.

Many of us are aware of Bluetooth and Wi-Fi but aren’t familiar with Zigbee or Z-Wave. Simply put, they are languages or wireless protocols used in smart devices for various home automation functions.

The degree of battery consumption, however, varies for the different connection integrations. For instance, Wi-Fi requires far more power than any other connection integration. While Bluetooth consumes comparatively less power but we all know about its range limitations. Both Zigbee and Z-wave use very low battery power.

In normal circumstances, a battery-powered device is not considered feasible when a Wi-Fi connection is involved due to its high power consumption. Smart locks are among the few exceptions, though. Given the improved standby features in the latest Wi-Fi routers and the advancements in battery technology, many battery-powered smart lock devices perform incredibly with Wi-Fi connection.


Why Prefer Alkaline Batteries Over Lithium Batteries?

Lithium, old rechargeable batteries are often subject to undesirable operation. For instance, they offer a very steep discharge curve at the end of their lives. This means the will give little or no warning before the batteries die. This increases the chances of getting locked out of your home, and you’ll have to resort to the traditional way of entry, that is, use a backup key to enter your home.

Therefore, in the case of smart locks, you should always use premium alkaline batteries, all of which give low battery warnings well before the battery dies. Many of these batteries feature gradual power discharge and alert when 20% of life is remaining, providing ample time to replace the batteries before they are at the end of their life.

Ideally, the users should replace the batteries immediately to ensure continuous, reliable operation, when given the low battery warning. New and unused alkaline batteries are best for replacement.


Closing Thoughts: Best Batteries for Smart Lock

When it comes to smart locks, AA batteries are certainly the most commonly used batteries, yet the user preferences differ based on the brand. While most smart locks require 4 AA batteries, others run on AAA batteries, the brands for which can again vary.

9V batteries, such as the Voniko 9V Batteries discussed above, are used less frequently than AA or AAA alkaline batteries. If you happen to be brand-oriented, you’ll be interested in knowing that most brands offer all these different types of alkaline batteries.

The list of best batteries for smart locks discussed above should prove valuable for anyone looking to purchase batteries for their newly purchased smart lock or replace their old smart lock batteries.

Either way, the Duracell CopperTop AA Alkaline Batteries are the best, topping our list for best smart lock batteries.

However, it is recommended that you conduct proper research on each option before making a purchase. When exploring through the options, consider the warranty options, how the product addresses the leakage issue, the battery life, compatibility with various connection integrations, safety, environment-friendliness, shelf storage, and reliability of the brand. Once you’ve got these areas covered, you’ll end getting the right batteries for your smart lock.

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Edward Clark
Edward Clark, with 15 years of hands-on experience, is a distinguished expert in smart locks and home security systems. He holds a B.S. in Computer Engineering with a focus on Cybersecurity and is a member of the Electronic Security Association (ESA). His credentials include certifications from ASIS International, IAPP, CompTIA, NTS, and CEDIA. With expertise spanning risk management, electronic security, and data privacy, he's been featured in The Guardian, Forbes, Wired, and more. Edward's mission: guiding individuals toward secure homes using the latest technologies.

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