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external rechargeable battery for iphone 4

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Best Buy customers often prefer the following products when searching for external rechargeable battery for iphone 4.

If you're a heavy user of your iPhone, you might be running out of battery at a crucial moment. An external battery pack can help you get more out of your phone and keep it charged longer. Browse the top-ranked list of external rechargeable batteries for iPhone 4 below along with associated reviews and opinions.

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  1. Anker - Power Bank (24000mAh, 65W, 3-Port) - Black - Front_Zoom
    Top comment

    "It can fast charge my iPhone, while charging my steam deck, and still have battery left afterwards. ...Extends my vision pro battery life by 4+ hours, giving me over 6 hours away from a plug."

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    Product Description

    Experience superior charging with this power bank, boasting a robust 65W total output and two USB ports for swift simultaneous charging of two high-demand devices. (Note: USB-C 1 delivers up to 45W, while USB-C 2 outputs up to 20W.) Enjoy rapid recharging with the 30W high-speed feature, achieving a full charge in just 3.5 hours—twice as quick as standard portable chargers. Crafted for versatility, it provides optimal charging for a range of devices including laptops, phones, tablets, and various USB devices. With its massive 24,000mAh capacity, it can power up a MacBook Pro once or provide up 4.8 charges for the latest iPhone, making it the perfect partner for weekend escapes. Experience a new level of charging with this power bank's speed, power, and remarkable flexibility.
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    Top comment

    "It can fast charge my iPhone, while charging my steam deck, and still have battery left afterwards. ...Extends my vision pro battery life by 4+ hours, giving me over 6 hours away from a plug."

    See all customer reviews

    Product Description

    Experience superior charging with this power bank, boasting a robust 65W total output and two USB ports for swift simultaneous charging of two high-demand devices. (Note: USB-C 1 delivers up to 45W, while USB-C 2 outputs up to 20W.) Enjoy rapid recharging with the 30W high-speed feature, achieving a full charge in just 3.5 hours—twice as quick as standard portable chargers. Crafted for versatility, it provides optimal charging for a range of devices including laptops, phones, tablets, and various USB devices. With its massive 24,000mAh capacity, it can power up a MacBook Pro once or provide up 4.8 charges for the latest iPhone, making it the perfect partner for weekend escapes. Experience a new level of charging with this power bank's speed, power, and remarkable flexibility.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  2. myCharge - POWERHUB ULTRA 10,000mAh Everything Built-In Portable Charge for Most USB Enables Devices - Black - Front_Zoom
    Top comment

    "Everything is attached can't leave any cords behind!!! has both iPhone plugs (lighting and USB C ) so both my wife and I can use it. great to have along incase you use up your battery! ...Battery Pack...Really like the attached charging cables for iPhone and USB-C"

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    Product Description

    The new myCharge POWERHUB ULTRA 10,000mAh everything built-in portable charger is one of a kind and packed with power. With an integrated iPhone (Apple® Lightning™) cable, an integrated USB-C cable, and built-in USB-A & USB-C ports, you can keep all your devices charged anywhere. Carrying charging cables is a thing of the past, not only are the cables built in for effortless charging but self-contained wall prongs make for effortless recharging – just plug it directly into the wall.
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    Top comment

    "Everything is attached can't leave any cords behind!!! has both iPhone plugs (lighting and USB C ) so both my wife and I can use it. great to have along incase you use up your battery! ...Battery Pack...Really like the attached charging cables for iPhone and USB-C"

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    Product Description

    The new myCharge POWERHUB ULTRA 10,000mAh everything built-in portable charger is one of a kind and packed with power. With an integrated iPhone (Apple® Lightning™) cable, an integrated USB-C cable, and built-in USB-A & USB-C ports, you can keep all your devices charged anywhere. Carrying charging cables is a thing of the past, not only are the cables built in for effortless charging but self-contained wall prongs make for effortless recharging – just plug it directly into the wall.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  3. Energizer - Ultimate Lithium 20,000 mAh 20W USB-C PD & 15W Qi Wireless 4-Port Portable Battery Charger Power Bank with LCD Display - Black - Front_Zoom
    Top comment

    "It is heavy, but worked out well as it does speed charge. On a new iphone I could get about 3-4 charges out of it before it would die. ...Iphone Dying...This unit does a great job of charging my iphone-when the battery was dying! Reliable!"

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    Product Description

    Charge your mobile devices with this Energizer power bank. This portable charger is a wireless Qi certified power bank that provides 20,000mAh capacity to charge smartphones, tablets, smartwatches, headphones, ear buds, and more. The Qi wireless fast charge supports up to 15W charging. Note that 10W for Apple, and 15W output for Samsung, Google Pixel, and other compatible devices should be expected. The 20,000mAh battery provides up to 72 hours of power. There are three outputs providomg 18W via a USB-A, 15W via the Wireless Qi charging mechanism, and 20W of power via the USB-C Power Delivery port. You can utilize all three ports at the same time for charging up to three devices at once. The 20W Power Delivery 3.0 USB-C allows you to fast charge certain iPhones from 0 to 50% in only 30 minutes with 20W of power. The 18W USB-A output supports fast charging for Samsung and other compatible Android devices allowing you to charge your compatible Android phone from 0-50% in only 30 minutes with 18W of power. The LCD screen displays current battery life and will show battery life as the unit charges as well. Energizer PowerSafe Management guarantees against short circuit, overcurrent, overcharge and overdischarge of your power bank and devices. A USB-C Cable is included for recharging the power bank or charging other devices.
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    Top comment

    "It is heavy, but worked out well as it does speed charge. On a new iphone I could get about 3-4 charges out of it before it would die. ...Iphone Dying...This unit does a great job of charging my iphone-when the battery was dying! Reliable!"

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    Product Description

    Charge your mobile devices with this Energizer power bank. This portable charger is a wireless Qi certified power bank that provides 20,000mAh capacity to charge smartphones, tablets, smartwatches, headphones, ear buds, and more. The Qi wireless fast charge supports up to 15W charging. Note that 10W for Apple, and 15W output for Samsung, Google Pixel, and other compatible devices should be expected. The 20,000mAh battery provides up to 72 hours of power. There are three outputs providomg 18W via a USB-A, 15W via the Wireless Qi charging mechanism, and 20W of power via the USB-C Power Delivery port. You can utilize all three ports at the same time for charging up to three devices at once. The 20W Power Delivery 3.0 USB-C allows you to fast charge certain iPhones from 0 to 50% in only 30 minutes with 20W of power. The 18W USB-A output supports fast charging for Samsung and other compatible Android devices allowing you to charge your compatible Android phone from 0-50% in only 30 minutes with 18W of power. The LCD screen displays current battery life and will show battery life as the unit charges as well. Energizer PowerSafe Management guarantees against short circuit, overcurrent, overcharge and overdischarge of your power bank and devices. A USB-C Cable is included for recharging the power bank or charging other devices.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  4. myCharge - AMP PRONG MAX 20,000mAh Everything Built-In Portable Charge for Most USB Enables Devices - Black - Front_Zoom
    Top comment

    "I know I can just throw it in my bag and not worry about anything tangling, and I don’t have to go looking for a cable when it’s time to charge my iPhone or iPad. I use an iPhone 11 Pro, and this battery is almost as portable as the phone itself. ...Great external battery for travel...Charges quickly and battery lasts a long time. Great for travel including international travel (can be plugged into 110 or 220V outlets)"

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    Product Description

    Keep your mobile devices powered on the go with the myCharge AMP PRONG 20K portable power pack. The 20000mAh capacity powers up to two devices simultaneously. The myCharge AMP PRONG 20K portable power pack has USB-C port and a built-in USB-C cable that deliver up to 12W of output for rapid charging. The device has built-in wall prongs for rapid recharging of the powerbank
    See all Power Adapters
    Top comment

    "I know I can just throw it in my bag and not worry about anything tangling, and I don’t have to go looking for a cable when it’s time to charge my iPhone or iPad. I use an iPhone 11 Pro, and this battery is almost as portable as the phone itself. ...Great external battery for travel...Charges quickly and battery lasts a long time. Great for travel including international travel (can be plugged into 110 or 220V outlets)"

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    Product Description

    Keep your mobile devices powered on the go with the myCharge AMP PRONG 20K portable power pack. The 20000mAh capacity powers up to two devices simultaneously. The myCharge AMP PRONG 20K portable power pack has USB-C port and a built-in USB-C cable that deliver up to 12W of output for rapid charging. The device has built-in wall prongs for rapid recharging of the powerbank
    See all Power Adapters
    See all Power Adapters
  5. myCharge - AMP PRONG PLUS 10,000mAh Everything Built-In Portable Charge for Most USB-C Enables Devices - Blue - Front_Zoom
    Top comment

    "I have used this with my iPhone 14 using my USB-C to lightning, and now my iPhone 15 with the included USB-C cable and they both work great....Impressive external battery pack...I bought this product because I recently became a Amazon delivery driver and the device we are required to use constantly drains the battery immensely so I decided that I needed to buy an external battery pack so far this device has made my job 100% more efficient it charges Very fast And has really good battery life I love that it plugs into the wall!! "

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    Product Description

    Keep your mobile devices powered on the go with the myCharge AMP PRONG 10K portable power pack. The 10000mAh capacity powers up to two devices simultaneously. The myCharge AMP PRONG 10K portable power pack has USB-C port and a built-in USB-C cable that deliver up to 12W of output for rapid charging. The device has built-in wall prongs for rapid recharging of the powerbank
    See all Power Adapters
    Top comment

    "I have used this with my iPhone 14 using my USB-C to lightning, and now my iPhone 15 with the included USB-C cable and they both work great....Impressive external battery pack...I bought this product because I recently became a Amazon delivery driver and the device we are required to use constantly drains the battery immensely so I decided that I needed to buy an external battery pack so far this device has made my job 100% more efficient it charges Very fast And has really good battery life I love that it plugs into the wall!! "

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    Product Description

    Keep your mobile devices powered on the go with the myCharge AMP PRONG 10K portable power pack. The 10000mAh capacity powers up to two devices simultaneously. The myCharge AMP PRONG 10K portable power pack has USB-C port and a built-in USB-C cable that deliver up to 12W of output for rapid charging. The device has built-in wall prongs for rapid recharging of the powerbank
    See all Power Adapters
    See all Power Adapters
  6. Energizer - MAX 5,000 mAh Ultra-Slim, 3-Port USB-C High Speed Universal Portable Charger Power bank, Charges Three Devices at Once - Black - Front_Zoom
    Top comment

    "Recharge my batteries....Easy to charge up and to recharge iPhone....Energizer Battery pack review...Good battery pack. Able to fully charge iPhone and iwatch simultaneously and have leftover capacity"

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    Product Description

    Charge your mobile devices with this Energizer power bank. The Energizer UE5010 is the perfect ultra-slim power bank for smartphones, tablets, and more. The UE5010 provides 5,000 mAh capacity to charge smartphones, tablets, smartwatches, headphones, earbuds, and more. The 5,000mAh battery provides up to 18 hours of power, while three outputs - two USB 2.1 Type-A ports and one USB-C port - consistently and efficiently deliver power to up to three devices at 10.5W. Four white LED indicator lights signify the charging status and current battery life. The textured diagonal pattern design prevents slippage, scratches, and fingerprints on the surface. The lightweight and ultra-slim design fits perfectly in your pocket wherever you go! Energizer PowerSafe Management guarantees protection against short circuit, overcurrent, overcharge, and overdischarge for your power bank and devices. A USB-C Cable is included for recharging the power bank or charging other devices.
    See all Portable Chargers & Power Banks
    Top comment

    "Recharge my batteries....Easy to charge up and to recharge iPhone....Energizer Battery pack review...Good battery pack. Able to fully charge iPhone and iwatch simultaneously and have leftover capacity"

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    Product Description

    Charge your mobile devices with this Energizer power bank. The Energizer UE5010 is the perfect ultra-slim power bank for smartphones, tablets, and more. The UE5010 provides 5,000 mAh capacity to charge smartphones, tablets, smartwatches, headphones, earbuds, and more. The 5,000mAh battery provides up to 18 hours of power, while three outputs - two USB 2.1 Type-A ports and one USB-C port - consistently and efficiently deliver power to up to three devices at 10.5W. Four white LED indicator lights signify the charging status and current battery life. The textured diagonal pattern design prevents slippage, scratches, and fingerprints on the surface. The lightweight and ultra-slim design fits perfectly in your pocket wherever you go! Energizer PowerSafe Management guarantees protection against short circuit, overcurrent, overcharge, and overdischarge for your power bank and devices. A USB-C Cable is included for recharging the power bank or charging other devices.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  7. Anker - Power Bank(10000mAh, 20W, 3-Port) - Black - Front_Zoom
    Top comment

    "It is lightweight, thin, and can power an IPhone 12 mini two full charges. My larger anker can power my 13 pro max 3-4 times but it is much heavier and larger...Used on vacation and lasted. 2 iphones"

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    Product Description

    Elevate your charging experience with the PowerCore III Sense (10000mAh, 20W, 3-Port). This power bank offers versatile charging options, featuring Triple Charging Modes including a 20W Power Delivery USB-C port, a PowerIQ-enabled USB-A port, and a trickle-charging mode for low-power devices. Charge two devices simultaneously through its dual USB ports. With exquisite craftsmanship, its sleek design and cool-blue LED light wheel showcase the battery level elegantly. Quality is paramount inside and out. Recharge swiftly in just 4.5 hours using a USB-C Power Delivery wall charger (charger not included), or approximately 10.2 hours with a USB-A charger and cable (not included). Elevate your charging game with PowerCore III Sense 10K.
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    Top comment

    "It is lightweight, thin, and can power an IPhone 12 mini two full charges. My larger anker can power my 13 pro max 3-4 times but it is much heavier and larger...Used on vacation and lasted. 2 iphones"

    See all customer reviews

    Product Description

    Elevate your charging experience with the PowerCore III Sense (10000mAh, 20W, 3-Port). This power bank offers versatile charging options, featuring Triple Charging Modes including a 20W Power Delivery USB-C port, a PowerIQ-enabled USB-A port, and a trickle-charging mode for low-power devices. Charge two devices simultaneously through its dual USB ports. With exquisite craftsmanship, its sleek design and cool-blue LED light wheel showcase the battery level elegantly. Quality is paramount inside and out. Recharge swiftly in just 4.5 hours using a USB-C Power Delivery wall charger (charger not included), or approximately 10.2 hours with a USB-A charger and cable (not included). Elevate your charging game with PowerCore III Sense 10K.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  8. Anker - Powerhouse 511 Portable Power Station 87.6 Wh - Dark Gray - Angle_Zoom
    Top comment

    "It’s a very good power bank that charge the iPhone very quickly and durable. It’s easy to pack and you can take it anywhere....I’m able to charge my iPad and iPhone and other items.Very sturdy but on the heavy side."

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    Product Description

    Anker PowerHouse 511: The ultra-powerful portable charger. 24,000mAh of charging power ensures over one complete charge for the MacBook Air and a significant battery boost for other laptops. Depending on battery size, most smartphones will get over 4 full charges with tablets also charging at least once. The built-in AC outlet uses a pure sine wave inverter to ensure the power output is just as good as what you get at home. Reduces audible and electrical noise in sensitive appliances. Never be left in the dark again. Choose between full brightness, low brightness, and SOS lighting modes at the push of the button.
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    Top comment

    "It’s a very good power bank that charge the iPhone very quickly and durable. It’s easy to pack and you can take it anywhere....I’m able to charge my iPad and iPhone and other items.Very sturdy but on the heavy side."

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    Product Description

    Anker PowerHouse 511: The ultra-powerful portable charger. 24,000mAh of charging power ensures over one complete charge for the MacBook Air and a significant battery boost for other laptops. Depending on battery size, most smartphones will get over 4 full charges with tablets also charging at least once. The built-in AC outlet uses a pure sine wave inverter to ensure the power output is just as good as what you get at home. Reduces audible and electrical noise in sensitive appliances. Never be left in the dark again. Choose between full brightness, low brightness, and SOS lighting modes at the push of the button.
    See all Power Adapters
    See all Power Adapters
  9. mophie - Powerstation PD (Fast Charge) 10,000 mAh Portable Charger for Most USB-Enabled Devices - Black - Front_Zoom
    Top comment

    "Very nice battery, takes a lot of time to charge. It has the size of an iPhone...this battery is very good, I charged my iPhone 12 in 2 times"

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    Product Description

    Charge three devices at once with the mophie powerstation 10K. It has a fast-charging USB-C PD port that puts out up to 20W as well as two USB-A ports. The compact powerstation has an internal 10,000mAh battery with the capacity to meet the demands of your day.
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    Top comment

    "Very nice battery, takes a lot of time to charge. It has the size of an iPhone...this battery is very good, I charged my iPhone 12 in 2 times"

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    Product Description

    Charge three devices at once with the mophie powerstation 10K. It has a fast-charging USB-C PD port that puts out up to 20W as well as two USB-A ports. The compact powerstation has an internal 10,000mAh battery with the capacity to meet the demands of your day.
    See all Portable Chargers & Power Banks
    See all Portable Chargers & Power Banks
  10. mophie - Snap+ Juice Pack Mini 5,000 mAh Portable Charger with MagSafe Compatibility - Black - Front_Zoom
    Top comment

    "This Mophie portable iPhone charger works well with Apple iPhones that can be wirelessly charged. ...Nice external battery MagSafe compatible...Nice external backup battery. Works fine with iPhone. Power lasts for +\- 1 1/4 charges."

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    Product Description

    Give your phone a boost of power in a snap! The snap+ juice pack is compatible with MagSafe for most iPhone 15/14/13/12 models and any Qi-enabled smartphone†, so you can charge while you're on-the-go regardless of your smartphone model. The magnetic hold ensures you get the perfect charge every time.
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    Top comment

    "This Mophie portable iPhone charger works well with Apple iPhones that can be wirelessly charged. ...Nice external battery MagSafe compatible...Nice external backup battery. Works fine with iPhone. Power lasts for +\- 1 1/4 charges."

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    Product Description

    Give your phone a boost of power in a snap! The snap+ juice pack is compatible with MagSafe for most iPhone 15/14/13/12 models and any Qi-enabled smartphone†, so you can charge while you're on-the-go regardless of your smartphone model. The magnetic hold ensures you get the perfect charge every time.
    See all MagSafe Portable Chargers & Power Banks
    See all MagSafe Portable Chargers & Power Banks
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