Does a VPN Drain Phone Battery in 2026

Phone security and battery life are top concerns for many smartphone users. All VPNs use your phone's battery (like any other app), but some drain your battery faster. Therefore, the ideal situation is if you can find a VPN to protect your phone at all times without needing to charge it throughout the day.

After testing 70+ VPNs, my team and I found the best VPNs that won't drain your phone battery quickly under most circumstances. We also provide some actionable tips that can help preserve battery power for longer while using a VPN.

My favorite VPN that’s battery-friendly is ExpressVPN. Its lightweight proprietary protocol makes it ideal for mobile devices as it boosts speeds and uses less battery. Plus, its security features make it ideal for safely accessing your favorite streaming accounts anywhere. Thanks to its 30-day money-back guarantee*, you can try all ExpressVPN features risk-free. If you're not 100% happy with it, you can request a refund.

Why Does a VPN Drain Your Phone Battery?

Several phone and VPN factors contribute to the amount of battery being drained. The best thing you can do for your battery is to not run your VPN continuously in the background at all times.

With that in mind, here are some other reasons:

• Encryption — VPNs protect your phone by encrypting your connection (most use strong AES 256-bit), meaning all the sent and received data gets encrypted. The encryption process drains the battery because it takes up processing power. Some VPNs allow you to choose a slightly less secure 128-bit encryption, but you won’t be as well protected.
• Security protocols — Depending on your VPN, you might have a choice of tunneling protocols — the way the VPN transmits your online traffic. A highly secure protocol like OpenVPN will consume plenty of battery power, while an older one like IKEv2 will use less. Just remember, more robust protocols use more power but provide the highest level of privacy.
• Mobile signal and data usage — Strong signals like 3G, 4G, and 5G use less battery because your phone won’t have to increase its signal receiver to stay connected. On the other hand, having a weak signal will result in more power usage. This is always the case, whether you’re using a VPN or not. In fact, a weak signal is usually worse with VPNs because they use up more power to maintain your connection. But even with a strong connection, you’ll still drain your battery if you use plenty of data, so be careful.
• CPU usage — Newer iOS and Android phones have an optimized CPU designed for heavy battery usage. This is due to hardware-accelerated AES encryption, which encrypts data on the app instead of the CPU. Older phones lack this feature, so they often drain batteries faster.
• Background usage — Most VPNs will stay open in the background, even when you’re not connected. The VPN app always tries to maintain an active connection with a server when it’s turned on, so it’s ready to go when needed. Consequently, this uses up the CPU and your mobile radio chip, further draining your battery. Therefore, you might only want to turn your VPN on when visiting websites or using apps you don’t trust.
• Your VPN provider — Not all VPNs are equal when it comes to battery usage. You might want to consider using a different VPN service that includes battery-saving features, for example, data compression tools.

Best VPNs for Battery Longevity in 2026

All of the VPNs on my list have battery-friendly smartphone apps that are easy to install and use. Whether you want to stream videos, access content from your home country while traveling or protect your online activity, you can do so without draining your phone battery too quickly.

Additionally, you can try them with confidence as they all come with a money-back guarantee. This lets you get your money back within a certain timeframe if you don't end up liking it.

Tips on How to Reduce Battery Drain While Using a VPN

The following points will help your battery last longer while using a VPN on your phone:

• Install a VPN on your home router — Switch the VPN off on your phone and instead install the service on a VPN-compatible router. All devices connected to your router (including your phone) will benefit from the VPN. You’ll save phone battery and protect your other devices (like computers, Smart TVs, and tablets). Just remember to switch the VPN on, on your phone when away from your router.
• Bring extra power — If you travel a lot, then you probably use unsecured public WiFi networks. Therefore, you want to have your VPN on at all times, or malicious parties can intercept your connection. Since using a VPN can quickly drain the battery, you should consider carrying an external battery bank as a backup.
• Limit your VPN use — Simply turn your VPN off if you aren’t using it. One way to do this is to disconnect your VPN, log out, and quit the app altogether.
• Adjust your VPN settings — Check your VPN settings to see if it has a battery-saver mode and enable it. Same with your phone. But make sure you know what happens when you do, as it may compromise your security. A “power saver” feature can also help, which shuts down your VPN when your device’s screen goes blank.

FAQs

Will a VPN drain my battery?

Indeed, a VPN will consume your phone's battery power, but the degree of consumption relies on multiple variables. Factors like having your VPN operate in the background, the age of your phone, and your signal's strength all play a part in determining your battery's longevity. However, there are measures you can implement to mitigate the effect your VPN exerts on your phone's battery life.

How much battery does a VPN use?

A VPN consumes around 5-15% battery on iOS and Android devices. Of course, each phone is different, and the actual amount depends on various factors. These include the VPN encryption level, the level of mobile coverage, and whether the VPN always runs in the background. If you use a lower encryption level, consistent mobile coverage, and switch your VPN off when not using it, your VPN won’t use much battery.

Should I leave my VPN on all the time?

From a security point of view, it depends on the apps you use and the websites you visit. Make sure you use a VPN if you’re visiting unsecured websites that don’t use SSL/HTTPS, as these sites can easily track you without a VPN. For credible websites, using a VPN won’t make much of a difference to your security. Note that if you leave your VPN on all the time, your phone battery will drain faster due to the power encryption.

However, it's best to keep your VPN on if you frequently change between secured and unsecured WiFi networks. If you use public WiFi without a VPN, hackers can easily intercept your data and obtain sensitive information.

Will a VPN affect the battery life of my iPad?

An iPad has a bigger and more powerful battery than a phone, so a VPN won’t affect its battery life that much. To protect your online activity without compromising speed, you might want to consider a VPN that's compatible with iOS. But even with an iPad’s larger battery, you can conserve more of it when logging out of your VPN when you aren't using it, so it doesn’t keep running in the background.

Get a Battery-Saving VPN Now

All VPNs consume your phone battery, but some can drain it much faster than expected. The best VPNs provide full-time security without needlessly draining your phone battery.

Out of the many VPNs with smartphone apps, I recommend ExpressVPN. Its Lightway protocol allows fast speeds without putting pressure on your battery while providing all-around protection. Plus, it’s backed by a 30-day money-back guarantee, so you can test ExpressVPN on your smartphone risk-free.