Apr 2, 2022 6 min read

Will the Apple Watch drain iPhone battery?

Will the Apple Watch drain iPhone battery?
Apple watches and an iPhone
Table of Contents

There is a lot of speculation about whether the Apple Watch drains the iPhone battery. Some people say that it does, and some people say that it doesn't. Well, we did some research to find out the truth.

In this blog post, we will discuss the results of our findings and let you know whether or not the Apple Watch drains iPhone battery.

Does Apple watch deplete iPhone battery?

The answer to this question is yes, especially If you use your watch heavily. Heavy usage on your Apple Watch will drain the battery on your iPhone faster. However, if you use it sparingly, then it will have a significantly lower impact on the battery life of your iPhone.

This is because the Apple watch interacts with the iPhone through Wi-fi, Bluetooth, connected apps, and GPS. All of these features use power when exchanging data and can quickly drain the battery on your iPhone.

Although users on multiple forums have reported that the drain of the Apple Watch on the iPhone battery usually improves after a few months. This may be attributed to the watch obtaining certain predictable data that it won't need to keep checking the iPhone intermittently for. For example, the watch can store maps and GPS data on a constantly visited route during workout activity and won't need to keep using energy to pull this data.

How long should an iPhone battery last?

An iPhone battery should last anywhere from 10 -18 hours, depending on your use. If you use your phone sparingly, then the battery will last longer than if you use it heavily.

Techradar tested the 2018 iPhone XR (with a battery capacity of 2942 mAh)  rigorously with a full charge for a day. Its energy efficiency algorithm kept it from burning too much energy and lasted about 17 hours.

They also performed a similar test on the iPhone XS Max( with a battery capacity of 2,716 mAh) with an impressive showing of about 15 hours with moderate to heavy usage.

Older models of the iPhone fare worse because Apple is always upgrading the energy efficiency of newer models of the iPhone.

Also note that you may not get a similar result as described above due to factors such as your usage, phone settings, iPhone model, battery condition, and more.

How to make your iPhone battery last longer?

There are a few things that you can do to make your iPhone battery last longer. They are:

  • Turn off location services: This will keep your iPhone from using GPS and other location services that can quickly drain the battery.
  • Reduce screen brightness: Reducing the screen brightness will also help conserve energy on your iPhone.
  • Disable notifications for apps that you don't often use: This will keep your phone from constantly searching for new notifications and using up energy in the process.
  • Close unused apps: If you have a lot of apps open that you're not using, close them. This will free up some processing power and save energy.
  • Update to the latest iOS version: Apple regularly updates its iOS software with optimizations that improve battery life. Make sure that you are running the latest version of iOS to get the best battery life possible.
  • Remove certain casings when charging: It has been observed that certain cases will cause the iPhone to heat up when it is being charged. remove the such casing from the phone before commencing charge.
  • Avoid extreme temperatures: The proper temperature for an Apple device is 16° to 22°C. This is its optimum comfort zone. It's especially crucial to avoid subjecting your gadget to temperatures above 35°C, which can reduce the lifespan of your battery or even damage it.
  • Charge to 50% when storing your iPhone for the long term: Fully charged batteries in storage can fall into a deep discharge rate, rendering it incapable of charging later. Charging to 50% allows it to discharge slowly when not in use. You should endeavor to recharge it every six months to 50% for optimum battery performance.
Can Apple watches be locked to a carrier? (Answered)
No, Apple Watches are not locked with any carrier after production. However, if you come across the term “carrier locked”, it simply means that....

Tips for conserving energy on your Apple Watch

Just like the iPhone, there are a few things that you can do to conserve energy on your Apple Watch. They are:

  • Turn off cellular data ( for cellular models): this should be turned off when you are not using it. it will prevent your watch from using cellular data and consuming energy unnecessarily.
  • Reduce screen brightness: You can reduce the screen brightness on your Apple Watch to conserve energy.
  • Disable notifications for apps that you don't often use: This will keep your watch from constantly searching for new notifications and using up energy in the process.
  • Close unused apps: If you have a lot of apps open that you're not using, close them. This will free up some processing power and save energy.
  • Update to the latest watchOS version: Apple regularly releases updates to its watchOS software with optimizations.
  • Disconnect the Bluetooth and Wi-fi: Whenever you are going to bed or you are using the watch with a feature that does not require a Wi- fi connection or Bluetooth connection to your phone, it makes sense to disconnect them in order to save some energy.
An Apple Watch lying on a connected iPhone

Will my Apple Watch work if my phone battery dies?

Yes, but not fully. This means that the Watch's data connectivity to the iPhone is required for certain features to work (for the GPS-only models). If the iPhone's battery dies, these features will not work.

That said, many other features of the Watch will still function without the connection to the iPhone, such as basic timekeeping, fitness tracking, and heart rate monitoring.  your iPhone's battery dies.

The GPS + Cellular models of the Apple Watch do not need the iPhone to be connected for cellular data to work. So, if your iPhone's battery dies, you will still be able to use the cellular and data features of the Watch.

The best ways to charge your Apple Watch and iPhone after their battery drains

You can charge your Apple Watch and iPhone in a few different ways. We will go over the most common methods below:

  • Charging Cable: This is the standard way to charge both devices. You simply plug the charging cable into an appropriate USB port and let it charge.
  • Wall Charger: If you have a wall socket charger, you can use that to charge your devices. Just plug in the wall socket, connect the other end to your device and let it do its thing.
  • Power Bank: If you're on the go and your devices run out of battery, you can use a power bank to give them some extra juice. Just connect it to the devices and let it charge.
  • Wireless Charging: Apple has added wireless charging capabilities to the iPhone 8 and later using the Qi-certified chargers. The Wireless Power Consortium (WPC) established the Qi charging standard, which is an open, worldwide charging standard. Also, Apple watches can be charged wirelessly using Apple propriety wireless magnetic charging docks. This allows you to charge your device without having to plug in any cables. You just need to place it on a compatible wireless charger.
Do Apple Watches have Sim Cards? (Answered)
No, the Apple Watch does not have a normal SIM card but the GPS + cellular models of the Apple Watch make use of an embedded SIM (eSIM).

The Bottom line

The thing is, Batteries are consumables that decline in the amount of charge they can hold over time. Hence, the Apple Watch definitely has some effect on the iPhone battery.

Although, It depends on how you use them and what settings you have enabled. However, by following some simple tips mentioned in this article, you can help conserve energy on both devices and extend their battery life.

We hope this article was helpful. Thank you for reading.

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