FSA/HSA: WHOOP is FSA/HSA eligible! As a certified retailer, you can purchase your WHOOP 4.0 Battery Pack directly with your FSA/HSA card at checkout.
LONG-LASTING POWER – Get continuous data for days on a single charge with our battery pack that enables you to charge on-the-go while you wear it.
DURABLE & WATER RESISTANT – Designed to provide long-lasting power for years to come. P68 dust-proof and water-resistant up to 1 meter for 2 hours.
COMPACT & PORTABLE – Compact and lightweight, making it easy to carry with you wherever you go. Whether you’re traveling, working out, or simply need to extend your WHOOP tracker’s battery life, this battery pack is the perfect solution.
EASY TO USE – To charge your WHOOP 4.0 Health and Fitness Tracker, simply slide the battery pack on your device for charging on-the-go. Use the included USB cable to recharge your battery pack from a laptop.
SAFE & RELIABLE – Built with safety in mind, our WHOOP 4.0 Battery Pack features overcharge and short-circuit protection to ensure that your WHOOP tracker is always protected.
EASY SETUP: Quickly and easily charge your WHOOP Battery Pack 4.0 every time before charging your WHOOP device. Plug the battery pack into a power source using the provided USB-C cord. The LED light will stay red until it reaches fully charged, and will turn green.
IP68 dust-proof and water-resistant up to 1 meter for 2 hours.
Color:
Onyx
Input Voltage:
3.85 Volts
Total USB Ports:
1
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Average Star Rating: 4.6 out of 5
(49 vote)
If you finish the payment today, your order will arrive within the estimated delivery time.
49 reviews for WHOOP Battery Pack 4.0
Rated 5 out of 5
Siam255 –
5.0 out of 5 stars
Now, I can get Back on Track
I had lost my charger (boo!) and had to order a new one. That sucked that I had to since it was preventable – I should have kept track of where I left it… I think it was in that car rental -_- anyway, I digress…It does what it’s supposed to do – best that we can hope for with anything we buy, right?Just get into the habit of charging it after you’ve charged your Whoop with it.Having gotten the charger back, my life performance can get back in track with my goals, haha!
Rated 5 out of 5
Amazon Customer –
5.0 out of 5 stars
Speed and timeliness were important to me… and Amazon & Whoop exceeded my expectation
I was preparing to leave Boston to return to Barbados and my flight was leaving the following day and my WHOOP charger was on 18%. Amazon managed to not only get the order to me the same day but before my battery actually died. I was impressed on both fronts!Thanks again!
Rated 5 out of 5
Mindy Tilden –
5.0 out of 5 stars
Extra battery
I bought the whoop for my husband, he is often away from home and needed an extra battery. This one plugs in, charges, and is ready to go when he needs a spare.
Rated 5 out of 5
Chia Walter –
5.0 out of 5 stars
Fast Shipping For Replacement Battery
Fast shipping and what I needed.Getting ready to fly home and realized I forgot to pack my battery. A quick order here got me a replacement (and a spare for next time) the next morning. Very pleased.
Rated 5 out of 5
Noelle –
5.0 out of 5 stars
My 3rd charger..
I was excited to find this on Amazon because I was tired of waiting for days to receive my delivery from Whoop! I couldn’t find my charger because it’s small. I love that it’s small because I can carry it around. Unfortunately, I lose them around the house..well, I used to. I made sure to place them in the same place in my home now because this is my THIRD charger!I love my whoop and I love that it’s small and I don’t have to take off my whoop to charge it. I don’t mind having three battery packs because I keep one on me at all times whether it’s in my purse or my car.
Rated 4 out of 5
Ryan Reviews Things! –
4.0 out of 5 stars
A WHOOP Necessity!
The WHOOP Battery Pack 4.0 has proven to be a valuable accessory for my WHOOP fitness tracker, providing a convenient solution for charging on the go. Its portability is a standout feature, allowing me to easily carry it in my pocket or bag. The compact size ensures that it doesn’t add unnecessary bulk to my belongings, making it an ideal companion for travel, outdoor activities, or simply when I’m away from a power source for an extended period.Mounting the Battery Pack on the WHOOP fitness tracker is a breeze. The magnetic attachment system ensures a secure connection, and the alignment is straightforward. The tracker locks into place effortlessly, and I can confidently wear it while the Battery Pack charges. The convenience of this design allows me to continue tracking my data seamlessly without interruption.However, one downside I encountered was the ease of losing the Battery Pack. Unfortunately, I misplaced the original one that came with my WHOOP fitness tracker, and had to purchase another separately. The small size makes it susceptible to getting misplaced or easily overlooked. It would be helpful if WHOOP could consider implementing some form of attachment or storage mechanism to mitigate the risk of losing the Battery Pack.Additionally, while the functionality and convenience of the Battery Pack are impressive, the price of WHOOP accessories can be a deterrent. The cost of replacing the Battery Pack or purchasing additional WHOOP accessories can add up quickly. It would be beneficial if WHOOP offered more affordable pricing options for their accessories to make them more accessible to a broader range of users.
3 people found this helpful
Rated 5 out of 5
Julie C. –
5.0 out of 5 stars
It cannot be destroyed lol
I accidentally washed it in the washing machine and it still works perfectly. I would not recommend doing that, but if you do it will still work.
Rated 5 out of 5
BW –
5.0 out of 5 stars
Have to have
I had no idea these Whoop Battery chargers do firmware updates, found that out after I received this one.
Rated 5 out of 5
Big Marge Callinan –
5.0 out of 5 stars
Charger replacement
Great product and when left uncharged my daughter would be so unhappy😊!
Rated 5 out of 5
michael riggs –
5.0 out of 5 stars
It works
It works. Make sure you update the firmware
Rated 5 out of 5
apples&oranges –
5.0 out of 5 stars
Great product
Very short charging time and charges my whoop to full charge every time! Would definitely recommend.
Rated 5 out of 5
Kayleigh –
5.0 out of 5 stars
No issues!
Like a normal one! Works great!
Rated 5 out of 5
Chris Paul –
5.0 out of 5 stars
Good battery
Quick service, got it to me quick. Not a knock off
Rated 5 out of 5
Lindsay Love Mae –
5.0 out of 5 stars
Works!
I hate that they are $50 and of course I found my old ones as soon as I ordered this, but I like knowing I have extra and not the anxiety of if I lose it because I have two others on hand
Rated 5 out of 5
Tracie G. –
5.0 out of 5 stars
Whoop Battery Replacement
It works great and as expected.
Rated 5 out of 5
donna peterson –
5.0 out of 5 stars
Perfect.
Exactly what I needed, came quickly and works great. It charges quickly
Rated 5 out of 5
andrew plaskon –
5.0 out of 5 stars
perfect replacement
Got the job done and is a perfect replacement battery pack for my whoop 4.0
Rated 5 out of 5
Zach R –
5.0 out of 5 stars
Perfect
Got here with same day shipping and was just what I needed. Couldnt ask for anything better
Rated 5 out of 5
Jonathan C Boldebuck –
5.0 out of 5 stars
WHOOP 4.0
On a road trip and forgot my battery, shipped and delivered to an Amazon box in two days, didn’t miss a sleep cycle.
Rated 4 out of 5
Tuan Hoang –
4.0 out of 5 stars
Good value
It’s a great value for what it does definitely recommend
Rated 5 out of 5
William Perez –
5.0 out of 5 stars
Exactly What i needed
My old one died after a year of usage. Came in fast and already charged.
Rated 5 out of 5
Alexandra Williamson –
5.0 out of 5 stars
Just as good as the one that came with my WHOOP
My husband and I both have WHOOP bands and he’s always losing his in the house. I bought an extra one so that we always have one ready to go. It was nice to get it from Amazon too. Much faster shipping than directly from WHOOP.
Rated 5 out of 5
James E. Green III –
5.0 out of 5 stars
It works!
Works just like it should
Rated 5 out of 5
Corinne Cook –
5.0 out of 5 stars
So convenient to be able to order on Amazon!
I was traveling and forgot my charger – was able to order with the option to deliver to an Amazon locker in a local store. This is something for other small brands to consider as far as the convenience of ordering / having items delivered. Consistent Whoop quality / happy to not lose my data whilst traveling.
2 people found this helpful
Rated 5 out of 5
C. Connolly –
5.0 out of 5 stars
Love my Woop
Misplaced my woo battery. 🪫. So easy to use and filled my need.
Rated 5 out of 5
Matthew Siemaszkiewicz –
5.0 out of 5 stars
Quality.
I love the whoop 4.0 battery but as any whoop user knows, they’re so easy to lose. You always need an extra just in case. Say it misplace the current battery you have now, start the countdown to losing your streak on whoop.Pros: light weight, inconspicuous, durableCons: easy to lose if you’re unorganized
2 people found this helpful
Rated 5 out of 5
Michael Kenny –
5.0 out of 5 stars
Works well
Simple to use
Rated 5 out of 5
ScratchGolferFL –
5.0 out of 5 stars
Perfection
I’m a long time avid user of the WHOOP 4.0 I inadvertently left the battery charging pack at a hotel during a business trip I’m not one to miss any days and my streak has been alive for about three years. I found the brand new unit available via Amazon, where transactions are always seamless. The product was as described in new condition in packaging. It arrives quickly and exceeded all of my expectations.Buy with confidence!
One person found this helpful
Rated 5 out of 5
David –
5.0 out of 5 stars
Genuine Whoop Product
Genuine whoop charger. Works as advertised and ships faster than buying from Whoop.
One person found this helpful
Rated 5 out of 5
Twins Rock –
5.0 out of 5 stars
Best!
I like to have back-ups and this is the one and it’s waterproof so it’s even better. Since this is so light, I can forget that I am charging my Whoop and get in a shower but I don’t have to worry about it anymore!
Rated 1 out of 5
Hamza –
1.0 out of 5 stars
poor handling
very low quality. was damaged when it arrived
Rated 5 out of 5
Mrs. D. Gosson –
5.0 out of 5 stars
works well
Works as advertised
Rated 5 out of 5
Michael Vetos –
5.0 out of 5 stars
Work perfectly
Worked great I just didn’t need it anymore that is why I returned it. It is an authentic charger and works like my one I got with the original whoop. I would recommend this if you need a charger.
Rated 5 out of 5
Jonesy –
Good spare battery
Good quality 👍🏼
Rated 5 out of 5
Yanick –
Speedy delivery
Was very quick to deliver will see if I get any problems in the future but it looks alright.
Rated 5 out of 5
Yes I did –
Perfect
As described
Rated 5 out of 5
blake mingay –
Perfect
It works perfectly for your whoop
Rated 5 out of 5
Luke M. –
Stopped working after 5 months
Charger stopped working after 5 months, despite being overly expensive at £45
Rated 5 out of 5
miss a –
Doesn’t work well
I brought this to replace the charger that came with my whoop. But since receiving it, it has never fully charged my whoop and not I struggle to even get the battery to charge so that I can charge my whoop.Very disappointed in the item considering the cost.
One person found this helpful
Rated 5 out of 5
William Hughes –
5.0 out of 5 stars
Works well!
This thing charges the product as promised! Buy!
One person found this helpful
Rated 5 out of 5
Stefen Romero –
5.0 out of 5 stars
Honest review of the whoop charger
Fast and easy to charge. Once fully charged, when put on my whoop band it fully charged in about 30-45 min from less than 20% battery life.
One person found this helpful
Rated 5 out of 5
Gustavo Jacome –
5.0 out of 5 stars
Buenísimo
Excelrnte
Rated 5 out of 5
Drey –
5.0 out of 5 stars
Easy replacement
Works just like the original. No issues and plugs right in and does the job.
One person found this helpful
Rated 5 out of 5
Stefex –
5.0 out of 5 stars
Good
Good but returned. Didn’t need it. Whoop comes with the same charger
3 people found this helpful
Rated 2 out of 5
Daniel Flick –
2.0 out of 5 stars
Two showed up broken. Poor QA/QC which is disappointing since the Whoop does provide valuable info.
I had 2 in a row that were not working on arrival. Shipping and packing was fine. The first did not hold a charge after the initial charge using the supplied cable and a standard usb outlet. The second charged fine but the indicator light did not work at all so there was no way of telling when the charge was complete or if it was charging the band so I had to look at the app to see if it was charging.
Rated 2 out of 5
Josh Wise –
2.0 out of 5 stars
Ehhh
Waiting for more brands to start using solid state batteries, whoop is ok but nickel and dimes you for everything so you should buy through Amazon to pinch those penny’s back
Rated 1 out of 5
Lindsey –
1.0 out of 5 stars
Battery doesn’t work
It’s never worked since I got it. Charged it for a full 24 hours and the light is still red.
Rated 1 out of 5
Emily –
1.0 out of 5 stars
These chargers suck.
These chargers a awful – I waste so much time trying to figure them out.
Rated 1 out of 5
Darcie Martin –
1.0 out of 5 stars
Slow shipping
Ordered the whoop and chose same day delivery. Two days later the charger still hadn’t shipped. I love the batteries themselves. However the lie of it being delivered same day or even overnight is disheartening
Siam255 –
5.0 out of 5 stars
Now, I can get Back on Track
I had lost my charger (boo!) and had to order a new one. That sucked that I had to since it was preventable – I should have kept track of where I left it… I think it was in that car rental -_- anyway, I digress…It does what it’s supposed to do – best that we can hope for with anything we buy, right?Just get into the habit of charging it after you’ve charged your Whoop with it.Having gotten the charger back, my life performance can get back in track with my goals, haha!
Amazon Customer –
5.0 out of 5 stars
Speed and timeliness were important to me… and Amazon & Whoop exceeded my expectation
I was preparing to leave Boston to return to Barbados and my flight was leaving the following day and my WHOOP charger was on 18%. Amazon managed to not only get the order to me the same day but before my battery actually died. I was impressed on both fronts!Thanks again!
Mindy Tilden –
5.0 out of 5 stars
Extra battery
I bought the whoop for my husband, he is often away from home and needed an extra battery. This one plugs in, charges, and is ready to go when he needs a spare.
Chia Walter –
5.0 out of 5 stars
Fast Shipping For Replacement Battery
Fast shipping and what I needed.Getting ready to fly home and realized I forgot to pack my battery. A quick order here got me a replacement (and a spare for next time) the next morning. Very pleased.
Noelle –
5.0 out of 5 stars
My 3rd charger..
I was excited to find this on Amazon because I was tired of waiting for days to receive my delivery from Whoop! I couldn’t find my charger because it’s small. I love that it’s small because I can carry it around. Unfortunately, I lose them around the house..well, I used to. I made sure to place them in the same place in my home now because this is my THIRD charger!I love my whoop and I love that it’s small and I don’t have to take off my whoop to charge it. I don’t mind having three battery packs because I keep one on me at all times whether it’s in my purse or my car.
Ryan Reviews Things! –
4.0 out of 5 stars
A WHOOP Necessity!
The WHOOP Battery Pack 4.0 has proven to be a valuable accessory for my WHOOP fitness tracker, providing a convenient solution for charging on the go. Its portability is a standout feature, allowing me to easily carry it in my pocket or bag. The compact size ensures that it doesn’t add unnecessary bulk to my belongings, making it an ideal companion for travel, outdoor activities, or simply when I’m away from a power source for an extended period.Mounting the Battery Pack on the WHOOP fitness tracker is a breeze. The magnetic attachment system ensures a secure connection, and the alignment is straightforward. The tracker locks into place effortlessly, and I can confidently wear it while the Battery Pack charges. The convenience of this design allows me to continue tracking my data seamlessly without interruption.However, one downside I encountered was the ease of losing the Battery Pack. Unfortunately, I misplaced the original one that came with my WHOOP fitness tracker, and had to purchase another separately. The small size makes it susceptible to getting misplaced or easily overlooked. It would be helpful if WHOOP could consider implementing some form of attachment or storage mechanism to mitigate the risk of losing the Battery Pack.Additionally, while the functionality and convenience of the Battery Pack are impressive, the price of WHOOP accessories can be a deterrent. The cost of replacing the Battery Pack or purchasing additional WHOOP accessories can add up quickly. It would be beneficial if WHOOP offered more affordable pricing options for their accessories to make them more accessible to a broader range of users.
3 people found this helpful
Julie C. –
5.0 out of 5 stars
It cannot be destroyed lol
I accidentally washed it in the washing machine and it still works perfectly. I would not recommend doing that, but if you do it will still work.
BW –
5.0 out of 5 stars
Have to have
I had no idea these Whoop Battery chargers do firmware updates, found that out after I received this one.
Big Marge Callinan –
5.0 out of 5 stars
Charger replacement
Great product and when left uncharged my daughter would be so unhappy😊!
michael riggs –
5.0 out of 5 stars
It works
It works. Make sure you update the firmware
apples&oranges –
5.0 out of 5 stars
Great product
Very short charging time and charges my whoop to full charge every time! Would definitely recommend.
Kayleigh –
5.0 out of 5 stars
No issues!
Like a normal one! Works great!
Chris Paul –
5.0 out of 5 stars
Good battery
Quick service, got it to me quick. Not a knock off
Lindsay Love Mae –
5.0 out of 5 stars
Works!
I hate that they are $50 and of course I found my old ones as soon as I ordered this, but I like knowing I have extra and not the anxiety of if I lose it because I have two others on hand
Tracie G. –
5.0 out of 5 stars
Whoop Battery Replacement
It works great and as expected.
donna peterson –
5.0 out of 5 stars
Perfect.
Exactly what I needed, came quickly and works great. It charges quickly
andrew plaskon –
5.0 out of 5 stars
perfect replacement
Got the job done and is a perfect replacement battery pack for my whoop 4.0
Zach R –
5.0 out of 5 stars
Perfect
Got here with same day shipping and was just what I needed. Couldnt ask for anything better
Jonathan C Boldebuck –
5.0 out of 5 stars
WHOOP 4.0
On a road trip and forgot my battery, shipped and delivered to an Amazon box in two days, didn’t miss a sleep cycle.
Tuan Hoang –
4.0 out of 5 stars
Good value
It’s a great value for what it does definitely recommend
William Perez –
5.0 out of 5 stars
Exactly What i needed
My old one died after a year of usage. Came in fast and already charged.
Alexandra Williamson –
5.0 out of 5 stars
Just as good as the one that came with my WHOOP
My husband and I both have WHOOP bands and he’s always losing his in the house. I bought an extra one so that we always have one ready to go. It was nice to get it from Amazon too. Much faster shipping than directly from WHOOP.
James E. Green III –
5.0 out of 5 stars
It works!
Works just like it should
Corinne Cook –
5.0 out of 5 stars
So convenient to be able to order on Amazon!
I was traveling and forgot my charger – was able to order with the option to deliver to an Amazon locker in a local store. This is something for other small brands to consider as far as the convenience of ordering / having items delivered. Consistent Whoop quality / happy to not lose my data whilst traveling.
2 people found this helpful
C. Connolly –
5.0 out of 5 stars
Love my Woop
Misplaced my woo battery. 🪫. So easy to use and filled my need.
Matthew Siemaszkiewicz –
5.0 out of 5 stars
Quality.
I love the whoop 4.0 battery but as any whoop user knows, they’re so easy to lose. You always need an extra just in case. Say it misplace the current battery you have now, start the countdown to losing your streak on whoop.Pros: light weight, inconspicuous, durableCons: easy to lose if you’re unorganized
2 people found this helpful
Michael Kenny –
5.0 out of 5 stars
Works well
Simple to use
ScratchGolferFL –
5.0 out of 5 stars
Perfection
I’m a long time avid user of the WHOOP 4.0 I inadvertently left the battery charging pack at a hotel during a business trip I’m not one to miss any days and my streak has been alive for about three years. I found the brand new unit available via Amazon, where transactions are always seamless. The product was as described in new condition in packaging. It arrives quickly and exceeded all of my expectations.Buy with confidence!
One person found this helpful
David –
5.0 out of 5 stars
Genuine Whoop Product
Genuine whoop charger. Works as advertised and ships faster than buying from Whoop.
One person found this helpful
Twins Rock –
5.0 out of 5 stars
Best!
I like to have back-ups and this is the one and it’s waterproof so it’s even better. Since this is so light, I can forget that I am charging my Whoop and get in a shower but I don’t have to worry about it anymore!
Hamza –
1.0 out of 5 stars
poor handling
very low quality. was damaged when it arrived
Mrs. D. Gosson –
5.0 out of 5 stars
works well
Works as advertised
Michael Vetos –
5.0 out of 5 stars
Work perfectly
Worked great I just didn’t need it anymore that is why I returned it. It is an authentic charger and works like my one I got with the original whoop. I would recommend this if you need a charger.
Jonesy –
Good spare battery
Good quality 👍🏼
Yanick –
Speedy delivery
Was very quick to deliver will see if I get any problems in the future but it looks alright.
Yes I did –
Perfect
As described
blake mingay –
Perfect
It works perfectly for your whoop
Luke M. –
Stopped working after 5 months
Charger stopped working after 5 months, despite being overly expensive at £45
miss a –
Doesn’t work well
I brought this to replace the charger that came with my whoop. But since receiving it, it has never fully charged my whoop and not I struggle to even get the battery to charge so that I can charge my whoop.Very disappointed in the item considering the cost.
One person found this helpful
William Hughes –
5.0 out of 5 stars
Works well!
This thing charges the product as promised! Buy!
One person found this helpful
Stefen Romero –
5.0 out of 5 stars
Honest review of the whoop charger
Fast and easy to charge. Once fully charged, when put on my whoop band it fully charged in about 30-45 min from less than 20% battery life.
One person found this helpful
Gustavo Jacome –
5.0 out of 5 stars
Buenísimo
Excelrnte
Drey –
5.0 out of 5 stars
Easy replacement
Works just like the original. No issues and plugs right in and does the job.
One person found this helpful
Stefex –
5.0 out of 5 stars
Good
Good but returned. Didn’t need it. Whoop comes with the same charger
3 people found this helpful
Daniel Flick –
2.0 out of 5 stars
Two showed up broken. Poor QA/QC which is disappointing since the Whoop does provide valuable info.
I had 2 in a row that were not working on arrival. Shipping and packing was fine. The first did not hold a charge after the initial charge using the supplied cable and a standard usb outlet. The second charged fine but the indicator light did not work at all so there was no way of telling when the charge was complete or if it was charging the band so I had to look at the app to see if it was charging.
Josh Wise –
2.0 out of 5 stars
Ehhh
Waiting for more brands to start using solid state batteries, whoop is ok but nickel and dimes you for everything so you should buy through Amazon to pinch those penny’s back
Lindsey –
1.0 out of 5 stars
Battery doesn’t work
It’s never worked since I got it. Charged it for a full 24 hours and the light is still red.
Emily –
1.0 out of 5 stars
These chargers suck.
These chargers a awful – I waste so much time trying to figure them out.
Darcie Martin –
1.0 out of 5 stars
Slow shipping
Ordered the whoop and chose same day delivery. Two days later the charger still hadn’t shipped. I love the batteries themselves. However the lie of it being delivered same day or even overnight is disheartening