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Best Buy customers often prefer the following products when searching for emergency phone battery.

The best emergency phone batteries are the ones that work when you need them to. Whether you're looking for a backup battery or a replacement for your primary charger, we've got you covered. Browse the top-ranked list of emergency phone batteries below along with associated reviews and opinions.

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  1. UltraLast - Lithium-Ion Battery for Select Samsung Cell Phones - Front_Zoom
    Top comment

    "i was worried about the oem catching fire so i replaced it with this one. this works great for my note 3 better battery life than oem battery...Finally committed to keeping my Note 3 a while longer by puchasing a new battery. Went all night not plugged in and still had 80% charge....great battery"

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    Product Description

    Equip your Samsung cell phone with this Ultralast CEL-N9000NF battery, which offers lithium-ion chemistry and 3.8V of power for reliable, efficient use. Overload protection helps keep your device safe from damage.
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    Top comment

    "i was worried about the oem catching fire so i replaced it with this one. this works great for my note 3 better battery life than oem battery...Finally committed to keeping my Note 3 a while longer by puchasing a new battery. Went all night not plugged in and still had 80% charge....great battery"

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    Product Description

    Equip your Samsung cell phone with this Ultralast CEL-N9000NF battery, which offers lithium-ion chemistry and 3.8V of power for reliable, efficient use. Overload protection helps keep your device safe from damage.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  2. UltraLast - CEL-IP6PLS-HC - Front_Zoom

    Model: CEL-IP6PLS-HC
    SKU: 6344518
    Top comment

    "Great battery life...I had it about a month still holding up good. I be on the phone for nearly an hour and battery goes down about 10%. ...Dantona - Lithium-Ion Battery for Apple iPhone 6s...Excellent battery"

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    Product Description

    This replacement 3.82 Volt 3325mAh Lithium Ion High Capacity battery fits the Apple - iPhone 6 Plus Smart Phone and meets or exceeds original manufacturer specifications.
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    Top comment

    "Great battery life...I had it about a month still holding up good. I be on the phone for nearly an hour and battery goes down about 10%. ...Dantona - Lithium-Ion Battery for Apple iPhone 6s...Excellent battery"

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    Product Description

    This replacement 3.82 Volt 3325mAh Lithium Ion High Capacity battery fits the Apple - iPhone 6 Plus Smart Phone and meets or exceeds original manufacturer specifications.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  3. UltraLast - CEL-IP7PLS - Front_Zoom

    Model: CEL-IP7PLS
    SKU: 6344526
    Top comment

    "Battery...Works okay It gives my phone more battery to use than that 20 percent I had...Good battery...Need to replace a battery and it worked perfectly."

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    Product Description

    This replacement 3.8 Volt 2900mAh Lithium Polymer battery fits the Apple iPhone 7 Plus Smart Phone and meets or exceeds original manufacturer specifications.
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    Top comment

    "Battery...Works okay It gives my phone more battery to use than that 20 percent I had...Good battery...Need to replace a battery and it worked perfectly."

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    Product Description

    This replacement 3.8 Volt 2900mAh Lithium Polymer battery fits the Apple iPhone 7 Plus Smart Phone and meets or exceeds original manufacturer specifications.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  4. Dantona - Lithium-Ion Battery for Apple iPhone 6s - Front_Zoom
    Top comment

    "I am glad I found a 6s battery at Best Buy. This battery turned out to be good and my phone holds a charge all day again. ...Battery...This is my 2nd battery I have ordered.. The first battery was great, stay charge for a long time but it only last for a few months. "

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    Product Description

    This replacement 3.8 Volt 1715mAh Lithium Ion battery fits the Apple A1633 Cellular Phone and meets or exceeds original manufacturer specifications.
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    Top comment

    "I am glad I found a 6s battery at Best Buy. This battery turned out to be good and my phone holds a charge all day again. ...Battery...This is my 2nd battery I have ordered.. The first battery was great, stay charge for a long time but it only last for a few months. "

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    Product Description

    This replacement 3.8 Volt 1715mAh Lithium Ion battery fits the Apple A1633 Cellular Phone and meets or exceeds original manufacturer specifications.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  5. UltraLast - Lithium-Ion Battery for Select Samsung Cell Phones - Front_Zoom
    Top comment

    "New Battery...After buying three batteries that didn't hold a charge, this one actually acted like a NEW battery....Samsung s5 battery...Works fine after two days in service. Holds a charge three times longer than the old battery."

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    Product Description

    Keep your cell phone charged throughout the day with this Ultralast CEL-I9600NF internal battery, which guards against power overload for added security. The lithium-ion battery is compatible with select Samsung cell phones and delivers 3.85V of power.
    See all Cell Phone Replacement Batteries
    Top comment

    "New Battery...After buying three batteries that didn't hold a charge, this one actually acted like a NEW battery....Samsung s5 battery...Works fine after two days in service. Holds a charge three times longer than the old battery."

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    Product Description

    Keep your cell phone charged throughout the day with this Ultralast CEL-I9600NF internal battery, which guards against power overload for added security. The lithium-ion battery is compatible with select Samsung cell phones and delivers 3.85V of power.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  6. UltraLast - Battery for Apple® iPhone® 5 - Front_Zoom
    Top comment

    "Good battery...Batteries hold charge most of the day before having to recharge...It was a little bit of a struggle to get the phone opened to replace the battery, but after I got the phone open it was fairly easy to install this new battery..so far so good with the battery life."

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    Product Description

    Power up your Apple iPhone 5 with this Ultralast CEL-IP5 battery, which provides a 1440 mAh capacity and 3.8V of power for efficiency. Overload protection ensures your device is shielded from unexpected power surges.
    See all Cell Phone Replacement Batteries
    Top comment

    "Good battery...Batteries hold charge most of the day before having to recharge...It was a little bit of a struggle to get the phone opened to replace the battery, but after I got the phone open it was fairly easy to install this new battery..so far so good with the battery life."

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    Product Description

    Power up your Apple iPhone 5 with this Ultralast CEL-IP5 battery, which provides a 1440 mAh capacity and 3.8V of power for efficiency. Overload protection ensures your device is shielded from unexpected power surges.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  7. Dantona - UltraLast Lithium-Polymer Battery for Apple iPhone 7 - Front_Zoom
    Top comment

    "Product received quickly, and was simply to replace. Battery life showed 100% within Settings once replaced. ...Replacing iPhone 7 battery...Excellent helpful service replacing IPhone 7 battery. Thanks !"

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    Product Description

    Refurbish your smartphone with this Ultralast lithium-polymer 3.8-volt rechargeable battery. The 1960 mAh capacity offers lasting power and reduced charging requirements. Compatibility with the Apple iPhone 7 model ensures a precise fit and proper operation. This Ultralast lithium-polymer 3.8-volt rechargeable battery comes with multiple tools for a simple, easy installation.
    See all Cell Phone Replacement Batteries
    Top comment

    "Product received quickly, and was simply to replace. Battery life showed 100% within Settings once replaced. ...Replacing iPhone 7 battery...Excellent helpful service replacing IPhone 7 battery. Thanks !"

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    Product Description

    Refurbish your smartphone with this Ultralast lithium-polymer 3.8-volt rechargeable battery. The 1960 mAh capacity offers lasting power and reduced charging requirements. Compatibility with the Apple iPhone 7 model ensures a precise fit and proper operation. This Ultralast lithium-polymer 3.8-volt rechargeable battery comes with multiple tools for a simple, easy installation.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  8. UltraLast - Lithium-Ion Battery for Select Kyocera Cell Phones - Front_Zoom
    Top comment

    "Replacement battery...Battery didn’t really work all that great, maybe it’s time for a new phone....I am happy that I bought UltraLast - Lithium-Ion Battery . It is nice to know that I can get this from a local store in Green Bay Wisconsin. "

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    Product Description

    Ensure your Kyocera cell phone has a constant source of power with this Dantona wireless phone replacement battery. Lithium-ion technology keeps your device powered up and ready, and the rechargeable design provides long-lasting use. Featuring a precise fit, this Dantona wireless phone replacement battery offers easy installation in select Kyocera Dura models.
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    Top comment

    "Replacement battery...Battery didn’t really work all that great, maybe it’s time for a new phone....I am happy that I bought UltraLast - Lithium-Ion Battery . It is nice to know that I can get this from a local store in Green Bay Wisconsin. "

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    Product Description

    Ensure your Kyocera cell phone has a constant source of power with this Dantona wireless phone replacement battery. Lithium-ion technology keeps your device powered up and ready, and the rechargeable design provides long-lasting use. Featuring a precise fit, this Dantona wireless phone replacement battery offers easy installation in select Kyocera Dura models.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  9. UltraLast - Lithium-Polymer Battery for Select Motorola Cell Phones - Front_Zoom
    Top comment

    "Nice Battery, Dumb Buyer...I'm giving me a zero for ordering the wrong size battery."

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    Product Description

    Keep your Motorola Moto and other select Motorola smartphones conveniently charged with this Dantona replacement smartphone battery. Lithium-polymer technology delivers reliable power to your device, while the rechargeable design offers long-lasting use. Featuring a compact size and simple setup, this Dantona replacement smartphone battery snaps neatly into place for effortless installation.
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    Top comment

    "Nice Battery, Dumb Buyer...I'm giving me a zero for ordering the wrong size battery."

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    Product Description

    Keep your Motorola Moto and other select Motorola smartphones conveniently charged with this Dantona replacement smartphone battery. Lithium-polymer technology delivers reliable power to your device, while the rechargeable design offers long-lasting use. Featuring a compact size and simple setup, this Dantona replacement smartphone battery snaps neatly into place for effortless installation.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
  10. UltraLast - Lithium-Ion Battery for Apple® iPhone® 5s - Front_Zoom
    Top comment

    "Great Battery...All quality tools and battery. Make sure you charge it up to 100% the first time I let it charge overnight. ...The batteries come with tools; however, watch the process to replace the battery before getting hands on."

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    Product Description

    Keep your Apple iPhone 5s running smoothly with this Ultralast CEL-IP5S lithium-ion battery, which provides a 3.8V electrical supply to your device. Overload protection ensures your phone stays safe from sudden power surges.
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    Top comment

    "Great Battery...All quality tools and battery. Make sure you charge it up to 100% the first time I let it charge overnight. ...The batteries come with tools; however, watch the process to replace the battery before getting hands on."

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    Product Description

    Keep your Apple iPhone 5s running smoothly with this Ultralast CEL-IP5S lithium-ion battery, which provides a 3.8V electrical supply to your device. Overload protection ensures your phone stays safe from sudden power surges.
    See all Cell Phone Replacement Batteries
    See all Cell Phone Replacement Batteries
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