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

When the power goes out, you can still use your electronics. But if you have a backup battery or two on hand, you'll be able to keep working even longer. Browse the top-ranked list of emergency batteries below along with associated reviews and opinions.

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  1. Energizer - MAX AA Batteries (24 Pack), Double A Alkaline Batteries - Front_Zoom
    Top comment

    "We always tend to run out of batteries. Buy extra for emergencies....Good value for the amount of batteries. Nice to have for emergencies."

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    Product Description

    Power the devices you love with Energizer MAX Alkaline AA Batteries. These Energizer batteries fuel the technology that helps you live, work and play, whether you need remote batteries, clock batteries, or backup batteries for your child's favorite toys and games. Energizer's #1 longest-lasting MAX, these double A batteries keep your favorite devices running longer. Powerseal Technology helps protect your devices against damaging leaks for up to two years after these AA Energizer MAX Batteries are fully used. With a shelf life of up to 12 years in storage, these long lasting batteries are ready to keep your devices operating when you need them most. Depend on the power of Energizer MAX AA Batteries to power your everyday electronics.
    See all Alkaline Batteries
    Top comment

    "We always tend to run out of batteries. Buy extra for emergencies....Good value for the amount of batteries. Nice to have for emergencies."

    See all customer reviews

    Product Description

    Power the devices you love with Energizer MAX Alkaline AA Batteries. These Energizer batteries fuel the technology that helps you live, work and play, whether you need remote batteries, clock batteries, or backup batteries for your child's favorite toys and games. Energizer's #1 longest-lasting MAX, these double A batteries keep your favorite devices running longer. Powerseal Technology helps protect your devices against damaging leaks for up to two years after these AA Energizer MAX Batteries are fully used. With a shelf life of up to 12 years in storage, these long lasting batteries are ready to keep your devices operating when you need them most. Depend on the power of Energizer MAX AA Batteries to power your everyday electronics.
    See all Alkaline Batteries
    See all Alkaline Batteries
  2. Renogy - Phoenix 222Wh 1500mAh Portable Charger for Outdoor Camping Home Emergency - Black - Front_Zoom
    Top comment

    "PROS: small package, easy to read display, lots of charging options, affordable CONS: takes 4 hours to fully charge using 120v cord *Test Run: This unit powered my 12v fridge (3/4 full, temp set to 34F) for 12 hours and still had 17% battery left. Once I add a 50w solar panel, this thing will work even better for me."

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    Product Description

    Take power wherever you go. Phoenix 200 is one of the lightest portable power stations with only 5.3 pounds and a capacity of 222Wh. Phoenix 200 can be charged to 80% in 1.5 hours when AC and USB-C are charged simultaneously at maximum power. It provides 4 recharging options: AC, USB-C, solar, and car. The Phoenix 200 solar generator can power 6 devices simultaneously and charge devices while recharging itself. It's ideal for camping, road trips, photography, remote work, and outdoor activities.
    See all Portable Chargers & Power Banks
    Top comment

    "PROS: small package, easy to read display, lots of charging options, affordable CONS: takes 4 hours to fully charge using 120v cord *Test Run: This unit powered my 12v fridge (3/4 full, temp set to 34F) for 12 hours and still had 17% battery left. Once I add a 50w solar panel, this thing will work even better for me."

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    Product Description

    Take power wherever you go. Phoenix 200 is one of the lightest portable power stations with only 5.3 pounds and a capacity of 222Wh. Phoenix 200 can be charged to 80% in 1.5 hours when AC and USB-C are charged simultaneously at maximum power. It provides 4 recharging options: AC, USB-C, solar, and car. The Phoenix 200 solar generator can power 6 devices simultaneously and charge devices while recharging itself. It's ideal for camping, road trips, photography, remote work, and outdoor activities.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  3. Ryze Tech - Battery for Tello - Front_Zoom

    Model: CP.PT.00000213.01
    SKU: 6239850
    Top comment

    "Good battery...If you own this drone then extra batteries are a must! Batteries work just fine. I would get four total for the drone....Bought for my tello drone since the battery dies close to 11 mins easy to swap batteries."

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    Product Description

    Keep your drone fully charged with this Ryze Tech Tello battery. It's easy to recharge thanks to the integrated micro USB port, and the high-quality cells distribute power evenly and recharge rapidly. The self-contained battery is also quick to install, connecting simply with the aircraft. Li-Po chemistry ignores shocks for complete consistency from this Ryze Tech Tello battery.
    See all Action Camera Batteries & Chargers
    Top comment

    "Good battery...If you own this drone then extra batteries are a must! Batteries work just fine. I would get four total for the drone....Bought for my tello drone since the battery dies close to 11 mins easy to swap batteries."

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    Product Description

    Keep your drone fully charged with this Ryze Tech Tello battery. It's easy to recharge thanks to the integrated micro USB port, and the high-quality cells distribute power evenly and recharge rapidly. The self-contained battery is also quick to install, connecting simply with the aircraft. Li-Po chemistry ignores shocks for complete consistency from this Ryze Tech Tello battery.
    See all Action Camera Batteries & Chargers
    See all Action Camera Batteries & Chargers
  4. Panasonic - eneloop Rechargeable AA Batteries (8-Pack) - Front_Zoom
    Top comment

    "I haven used them in a flashlight or anything I'd need to rely on in an emergency. Good value for the price compared to buying one time use batteries....Great batteries for wireless gaming controllers...These are great batteries. Especially for videogame controllers. They go far beyond most battery packs as far as hours and lifetime of each battery is concerned."

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    Product Description

    Power your electronics with ease using these Panasonic eneloop BK-3MCCA8BA AA batteries, which come precharged for efficiency. The rechargeable batteries offer up to 2100 lifetime charges for long-lasting use.
    See all Rechargeable Batteries
    Top comment

    "I haven used them in a flashlight or anything I'd need to rely on in an emergency. Good value for the price compared to buying one time use batteries....Great batteries for wireless gaming controllers...These are great batteries. Especially for videogame controllers. They go far beyond most battery packs as far as hours and lifetime of each battery is concerned."

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    Product Description

    Power your electronics with ease using these Panasonic eneloop BK-3MCCA8BA AA batteries, which come precharged for efficiency. The rechargeable batteries offer up to 2100 lifetime charges for long-lasting use.
    See all Rechargeable Batteries
    See all Rechargeable Batteries
  5. Panasonic - eneloop Rechargeable AAA Batteries (12-Pack) - Front_Zoom
    Top comment

    "Great batteries...I love mu eneloop charger and rechargeable batteries. I am replacing single use batteries in all my devices as soon as the current battery dies. ...Great for Rechargeable batteries...While they seem to maybe only hold 50%-75% of charge of a regular high-end battery, the fact that I can recharge them over and over is a huge benefit, both economically, and environmentally. "

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    Product Description

    Enjoy the reliability of these Panasonic eneloop two-pack AAA batteries. Rechargeable cell technology lets this battery charge up to 2,100 times so you can save on the cost of replacements while minimizing waste. These Panasonic eneloop two-pack AAA batteries are pre-charged for immediate use upon purchase and can be stored for a long period of time before use.
    See all Rechargeable Batteries
    Top comment

    "Great batteries...I love mu eneloop charger and rechargeable batteries. I am replacing single use batteries in all my devices as soon as the current battery dies. ...Great for Rechargeable batteries...While they seem to maybe only hold 50%-75% of charge of a regular high-end battery, the fact that I can recharge them over and over is a huge benefit, both economically, and environmentally. "

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    Product Description

    Enjoy the reliability of these Panasonic eneloop two-pack AAA batteries. Rechargeable cell technology lets this battery charge up to 2,100 times so you can save on the cost of replacements while minimizing waste. These Panasonic eneloop two-pack AAA batteries are pre-charged for immediate use upon purchase and can be stored for a long period of time before use.
    See all Rechargeable Batteries
    See all Rechargeable Batteries
  6. Best Buy essentials™ - C Batteries (4-Pack) - Alt_View_Zoom_11
    Top comment

    "Batteries...We bought batteries for our emergency flashlights since the power goes out regularly here...Battery...Batteries are batteries, what can I say except they work.."

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    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BC4PK C Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline C batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 7,500 mAh capacity and 1.5 V of power, ensuring your toys, instruments, flashlights and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Batteries...We bought batteries for our emergency flashlights since the power goes out regularly here...Battery...Batteries are batteries, what can I say except they work.."

    See all customer reviews

    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BC4PK C Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline C batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 7,500 mAh capacity and 1.5 V of power, ensuring your toys, instruments, flashlights and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  7. Digipower - Re-Fuel Rechargeable Lithium-Ion Replacement Battery for Nikon EN-EL5 - Front_Zoom
    Top comment

    "Battery works fine....These batteries work fine. I have used them previously....Great battery...Bought as an emergency backup. Plenty in stock.great customer service"

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    Product Description

    Keep your compatible Nikon digital camera powered and ready for use with this DigiPower RF-NKL5 rechargeable lithium-ion battery, which features 3.7V of power and a 900 mAh capacity for reliable performance.
    See all Camera Batteries
    Top comment

    "Battery works fine....These batteries work fine. I have used them previously....Great battery...Bought as an emergency backup. Plenty in stock.great customer service"

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    Product Description

    Keep your compatible Nikon digital camera powered and ready for use with this DigiPower RF-NKL5 rechargeable lithium-ion battery, which features 3.7V of power and a 900 mAh capacity for reliable performance.
    See all Camera Batteries
    See all Camera Batteries
  8. Digipower - Re-Fuel Rechargeable Lithium-Ion Replacement Battery for Nikon EN-EL19 - Front_Zoom
    Top comment

    "battery...Um, its a battery, not much to say about batteries....emergency battery replacement for camera - great value"

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    Product Description

    Replace the EN-EL19 battery in your compatible Nikon digital camera with this DigiPower RF-NKL19 lithium-ion battery, which delivers 3.7V of power and features a 650 mAh capacity for reliable performance.
    See all Camera Batteries
    Top comment

    "battery...Um, its a battery, not much to say about batteries....emergency battery replacement for camera - great value"

    See all customer reviews

    Product Description

    Replace the EN-EL19 battery in your compatible Nikon digital camera with this DigiPower RF-NKL19 lithium-ion battery, which delivers 3.7V of power and features a 650 mAh capacity for reliable performance.
    See all Camera Batteries
    See all Camera Batteries
  9. Best Buy essentials™ - D Batteries (4-Pack) - Alt_View_Zoom_11
    Top comment

    "D Cell Batteries...Keep extra for any home emergency....D Batteries (4-Pack)...Good price for flashlight batteries. Don't know yet how long they last for emergency lighting."

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    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BD4PK D Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline D batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 18,000 mAh capacity and 1.5 V of power, ensuring your toys, radio receivers, flashlights and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "D Cell Batteries...Keep extra for any home emergency....D Batteries (4-Pack)...Good price for flashlight batteries. Don't know yet how long they last for emergency lighting."

    See all customer reviews

    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BD4PK D Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline D batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 18,000 mAh capacity and 1.5 V of power, ensuring your toys, radio receivers, flashlights and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  10. Best Buy essentials™ - Assorted Batteries with Storage Box (33-Pack) - Alt_View_Zoom_11
    Top comment

    "Purchased for emergency preparedness. Love the fact they come in a storage box. ...Batteries...Great to have for emergency use and for every day use"

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    Product Description

    They’re just batteries—until your electronics need power. The Best Buy essentials BE-BMULTIPK Assorted Batteries with Storage Box (33-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This alkaline battery kit contains AA batteries (12), AAA batteries (12), C batteries (4), D batteries (4) and a 9 V battery, providing you with more than enough backups for when you need them. Safe and environmentally friendly, they are also mercury and cadmium free. The batteries also come in an included storage box, keeping them neatly stored and organized. Be prepared for the next time you need power with alkaline batteries Backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Purchased for emergency preparedness. Love the fact they come in a storage box. ...Batteries...Great to have for emergency use and for every day use"

    See all customer reviews

    Product Description

    They’re just batteries—until your electronics need power. The Best Buy essentials BE-BMULTIPK Assorted Batteries with Storage Box (33-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This alkaline battery kit contains AA batteries (12), AAA batteries (12), C batteries (4), D batteries (4) and a 9 V battery, providing you with more than enough backups for when you need them. Safe and environmentally friendly, they are also mercury and cadmium free. The batteries also come in an included storage box, keeping them neatly stored and organized. Be prepared for the next time you need power with alkaline batteries Backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
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