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Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
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Eligible for Return, Refund or Replacement within 30 days of receipt
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Pilot Automotive CA-9911PK4 USB AAA Rechargeable Battery, 4 Pack (USBCell ECO)

3.8 3.8 out of 5 stars 66 ratings
$19.99
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Purchase options and add-ons

Number of Batteries 4 Lithium Ion batteries required. (included)
Brand Pilot Automotive
Battery Cell Composition Lithium
Voltage 1.5 Volts
Reusability Rechargeable

About this item

  • Conveniently recharge in any powered USB port
  • Each durable battery capable of over 500 recharges
  • Each delivers 1.5V and 1040 mAh of power for a long-lasting charge, with stable output
  • Recharges in 2 hours
› See more product details

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Product Description

Each Eco Cell lithium polymer battery is equipped with charge overload and can be recharged in any powered USB 2.0 or 3.0 port, so your in-car charger, computer or power bank is also a battery charger. Each durable battery is designed for 500 recharging cycles, minimal self-discharge when idle, and is engineered to deliver a consistent 1.5V / 1040 mAh of power. Perfect for home, auto and camping.

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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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Pilot Automotive CA-9911PK4 USB AAA Rechargeable Battery, 4 Pack (USBCell ECO)

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What's in the box

  • Rechargeable AAA Batteries (4)^Instructions

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    Customer reviews

    3.8 out of 5 stars
    3.8 out of 5
    66 global ratings

    Customers say

    Customers are not happy with the charging of the battery. They say it doesn't charge fully, and that it doesn’t hold charges as long as regular batteries. Customers also have different opinions on quality.

    AI-generated from the text of customer reviews

    25 customers mention12 positive13 negative

    Customers are mixed about the quality of the battery. Some mention that they work great and are easy to charge while travelling, while others say that none of them work.

    "It's very useful." Read more

    "Liked them would have been 5 stars but on stoped working." Read more

    "These work well enough. Sometimes little USBs on a laptop are not grounded so they sometimes do not charge on them...." Read more

    "Great Idea, but do not work in many devices. I purchased these to power FireTV stick remote, but the remote does not work at all with these...." Read more

    28 customers mention7 positive21 negative

    Customers are dissatisfied with the charging of the auto part. They mention that the batteries do not charge properly, and they never achieve a full charge. Some say that the battery does not hold charges as long as regular batteries, and that it would not even turn on with these batteries. They also mention that they may not charge in every USB slot, and may only charge in shallow USB ports.

    "Terrible, not much capacity, look for something else !!!" Read more

    "...These also do not hold a charge very long, even when not in use (i.e. sitting in a drawer)...." Read more

    "Good item. Doesn't seem to last as long as alkaline battery, but easy to recharge." Read more

    "...Also, due to there small size they only use half of the USB port so you have to make sure to get it in right and that it is secure - it can loosen..." Read more

    Handy to charge, batteries may have aged poorly in storage
    3 Stars
    Handy to charge, batteries may have aged poorly in storage
    Three of four batteries were good. Plugged them in to charge for a couple hours, three charged and one started leaking inside it's wrap. I bought an official charger with these batteries, so it shouldn't have been an over volt issue. Have yet to test the USB ports on the charger so it may have been the charger but I'm assuming it's just a dud battery.
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    Top reviews from the United States

    A. Bonanini
    5.0 out of 5 stars No capacity !!!
    Reviewed in the United States on January 10, 2017
    Verified Purchase
    Terrible, not much capacity, look for something else !!!
    One person found this helpful
    Helpful
     Report
    Wadenwater
    3.0 out of 5 stars Three Stars
    Reviewed in the United States on September 9, 2017
    Verified Purchase
    Liked them would have been 5 stars but on stoped working.
    Helpful
     Report
    C. Wright
    1.0 out of 5 stars Good Idea, Poor Execution
    Reviewed in the United States on October 30, 2017
    Verified Purchase
    Great Idea, but do not work in many devices. I purchased these to power FireTV stick remote, but the remote does not work at all with these. The AAA version are also very finicky getting attached to USB for charging. I found I had to use a USB dongle in most cases. These also do not hold a charge very long, even when not in use (i.e. sitting in a drawer). I also purchased AA version to use in my ANR headset, but using these introduces alot of white noise (too high voltage, 1.5V vs 1.2V?)
    Helpful
     Report
    Juan Araya
    5.0 out of 5 stars Five Stars
    Reviewed in the United States on December 25, 2016
    Verified Purchase
    It's very useful.
    Helpful
     Report
    Jay Miller
    4.0 out of 5 stars I like them
    Reviewed in the United States on February 23, 2016
    Verified Purchase
    These work well enough. Sometimes little USBs on a laptop are not grounded so they sometimes do not charge on them. Also, due to there small size they only use half of the USB port so you have to make sure to get it in right and that it is secure - it can loosen easily due to the size. Overall it works and is a great product - being AAA it just has some minor inconveniences due to the size. Mainly I use these for the kids so they quit dropping dead alkalines back in the drawer and since they use them so fast by never turning things off.
    7 people found this helpful
    Helpful
     Report
    SoCalBeachRunner
    2.0 out of 5 stars Great idea. Not quite there yet.
    Reviewed in the United States on June 7, 2018
    Verified Purchase
    I really wish this was a great product and I could give it a positive review and re-buy. However, it's the total opposite. Returned these because half didn't work out of the package, the rest charged intermittently and seemed to never achieve a full charge or full voltage. This is such a great idea. Honestly, I'd give it a 1 for execution but a 5+ for concept. To the inventor / manufacturer: Please go back to the design room and make this work. I'd like to see an improved version. Remember the story of the guy who invented the zipper? This is equivalent to the version that requires pliers just to open and close your suit, and then fails. Keep trying. :)
    One person found this helpful
    Helpful
     Report
    CT
    5.0 out of 5 stars Five Stars
    Reviewed in the United States on January 10, 2017
    Verified Purchase
    Good item. Doesn't seem to last as long as alkaline battery, but easy to recharge.
    One person found this helpful
    Helpful
     Report
    Mithrial
    5.0 out of 5 stars and they are awesome. I'm not going back to standard out of ...
    Reviewed in the United States on March 27, 2018
    Verified Purchase
    Used them for years... and they are awesome. I'm not going back to standard out of the pack use once and then dispose of batteries any longer. Give me access to a USB port and I'm g2g.
    Helpful
     Report

    Top reviews from other countries

    McRocket
    5.0 out of 5 stars Great product.
    Reviewed in Canada on March 19, 2020
    Verified Purchase
    I have had mine for several years and they still charge reasonably quickly, give a good, solid use and were not that expensive to buy. Plus, the bonus that I can plug them into a USB port is VERY convenient for me.
    I highly recommend this product.
    Report
    May
    3.0 out of 5 stars 1 battery would not charge
    Reviewed in Canada on February 5, 2019
    Verified Purchase
    Bouht a 4 pk USB rechargeble batteries and 1 would not charge. The other 3 were fine. Approx 2 hrs to charge them. If the 4th would charge then I would give it a higher rating. I use for TV converter.
    Report
    Katherine M.
    5.0 out of 5 stars Great product
    Reviewed in Canada on November 10, 2016
    Verified Purchase
    Just as advertised. They charge quickly and last a long time between charges. They arrived in the projected time frame. I'm ordering from Canada so with the exchange rate they are pricey, but if you're going to use them and are concerned about the environmental impact of single use batteries, they are worth the investment.
    2 people found this helpful
     Report
    Pascale Deschamps
    1.0 out of 5 stars Picky about USB charger, and longer than AAA (won't fit)
    Reviewed in Canada on November 30, 2017
    Verified Purchase
    Two important caveats:
    - These "AAA" are longer than the standard AAA. Unless your device has some "spring" like a remote controller, you probably won't be able to fit them. They litterally don't fit in my shaver.

    - They are advertised as USB, but they are very picky on the charger type. I tried different (phone) chargers and none worked.
    I could only charge them from my desktop, which defeat the point of "portability".
    Report
    BENOIT DION
    5.0 out of 5 stars cap are easily lost
    Reviewed in Canada on July 13, 2018
    Verified Purchase
    cap are easily lost.
    hard to get good contact for charging
    Report