How to Charge WHOOP 4.0 (Step-by-Step with Video)

by | Jul 24, 2023

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Short Answer:

The WHOOP 4.0 can be charged by sliding the battery onto the device. Typically, it takes around 90 minutes for a full charge, and the battery life lasts up to 5 days. The app will notify you when it’s time to charge.

So, you’ve just invested in a shiny new WHOOP 4.0, and amidst all the excitement and anticipation, you suddenly realize you’re not exactly sure how to charge it.

Don’t sweat it, because I’ve got you covered!

Whether you’re new to the WHOOP family or just need a quick refresher, let’s dive into a simple, step-by-step guide on how to charge your WHOOP 4.0, ensuring it’s always powered up and ready to go when you are.

Feel free to check out the video below, or continue reading for instructions.

How to Charge WHOOP 4.0

When it comes to charging your WHOOP 4.0, it’s all about keeping things simple and seamless.

To ensure that you don’t have to take it off to charge, WHOOP 4.0 utilizes a slide-on battery pack. Here’s a simple step-by-step process to get your device powered up:

  1. Ensure the W on the battery pack is facing up, and your WHOOP strap is also on properly (WHOOP text should be right side up).
  2. Slide the battery pack onto the band until you feel it lock into place.
  3. Once the battery pack is fully drained, simply remove it and plug it into a USB charging port to get it ready for the next time you need to charge.
  4. Continue to wear the strap as the battery pack recharges.

How to Know if WHOOP is Charged

In order to find out how much charge your WHOOP Battery Pack or sensor have, simply double-tap them and see what color the LED is. It can be finicky, so you may have to do it a couple times.

Battery Pack

  1. If the Battery Pack is green, it has 90%-100% charge left.
  2. If your Battery Pack is red, it has less than 90% charge left.


  1. If your WHOOP light is green it has 75%-100% charge.
  2. If your WHOOP light is solid red, it has 5%-25% charge.
  3. If your WHOOP light is blinking red, it has less than 5% charge left.

How Long Does WHOOP Take to Charge?

Charging times for the WHOOP 4.0 can vary, but generally, it takes about 60 to 90 minutes for the battery pack to fully charge.

Then, once you place the battery pack on your WHOOP strap, it takes 2 hours and 50 minutes to charge to 100% from a 5% charge. We got this number by completing the charging process 10 times, then taking the average of them.

The strap itself, once fully charged, can last for around 3-5 days depending on usage.

How Long Does WHOOP Battery Last?

A WHOOP battery will last a different amount of time depending on who is wearing it.

The battery life of the WHOOP strap is designed to last from three to five days under normal use. Various factors such as workout frequency and data types collected can affect this duration.

How to Tell if a WHOOP Strap is Charging

Unfortunately, the WHOOP strap itself doesn’t have a way of showing you its current battery level.

To find out if your WHOOP is charging, simply open the WHOOP app on your phone, and look at the battery icon on the top right. This lets you know not only that the device is charging, but also the current battery level.

how to tell if whoop strap is charging

How Many Charges Can I Get Out Of My WHOOP Battery Pack?

Generally speaking, you can get one full charge out of your Battery Pack, assuming that your WHOOP strap is close to, or full dead.

If your WHOOP is around 50%, the Battery Pack will charge it to 100%, then you’ll have another roughly 50% left in the Battery Pack.

How to Charge WHOOP 4.0 Without Battery Pack

In an unfortunate circumstance where you find yourself without the battery pack, it’s important to know that WHOOP 4.0 cannot be charged directly with a USB cable. The design of the WHOOP strap requires the custom-made battery pack for charging.

If you’ve misplaced your battery pack, the best course of action is to buy a new one. Here is a direct link to Amazon purchase a new WHOOP 4.0 battery pack.

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Ken Lynch

by Ken

Ken is a Data Analyst in the Healthcare industry and the owner and sole contributor to The Wearable Guy.

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