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Big Batterys

A battery backup system is a device that provides emergency power to your home's electrical system in the event of a power outage. When the power goes out, the backup system takes over and ensures that you still have light, heat, and other essential services. Browse the top-ranked list of big batterys below along with associated reviews and opinions.

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  1. EcoFlow - DELTA PRO ULTRA 6000Wh Battery

    SKU: J36C7VZRKL

    About 10 degrees warmer. I switched the batteries around to ensure that it wasn’t the battery and got the same results. ...Looks very good, but batteries are running about 15 degs F hotter than Delta...

    Product Description

    A rechargeable black LiFePO4 battery backup providing 120 volts for home, emergency, camping, and RV use.
    See all Solar Generators & Power Banks
    Your price for this item is $3,299.00
  2. EcoFlow - DELTA 3 Extra Battery

    SKU: J36C7V49FS

    its a extra battery.

    Product Description

    A modular silver battery accessory that expands storage and runtime for DELTA 3 series portable power stations.
    See all Solar Generators & Power Banks
    Your price for this item is $557.99
    Save $41
    The previous price was $599.00
  3. EcoFlow - DELTA 2 Max 2048Wh Smart Extra Battery

    SKU: J36C7VK5X9

    Great battery...This battery goes well with my Delta 2. Gives me more reserve power. ...Delta 2 Max Smart Extra Battery...The extra MAX battery is working great with my Delta 2. I was waiting for EcoFlow...

    Product Description

    A rechargeable black battery that doubles or triples DELTA 2 Max power capacity for extended off-grid use.
    See all Solar Generators & Power Banks
    Your price for this item is $1,285.99
    Save $113
    The previous price was $1,399.00
  4. Renogy - 12V 100Ah Pro Smart Lithium Iron Phosphate Battery w/Bluetooth & Self-heating Function

    SKU: J39HF8FWY6

    Product Description

    A black rechargeable 12V lithium iron phosphate battery featuring Bluetooth connectivity and a self-heating function.
    See all Lithium Batteries
    Your price for this item is $599.99
  5. Renogy - 24V 200Ah Core Series Deep Cycle Lithium Iron Phosphate Battery

    SKU: J39HF8FVWF

    Product Description

    A rechargeable black lithium iron phosphate battery offering fast charging, self-heating, and automatic cell balancing for reliability.
    See all Lithium Batteries
    Your price for this item is $2,456.99
  6. WORX - 20V PRO 8.0Ah Lithium-Ion High-Capacity Battery

    SKU: J366GTCX63

    Battery...[This review was collected as part of a promotion.] Your batteries need research! They don't last long, as to holding a full charge and get progressively worse!...I decided to get the real battery...

    Product Description

    A high-capacity black lithium-ion battery delivering extended run times and advanced cell protection for 20V tools.
    See all Power Equipment Batteries & Chargers
    Your price for this item is $133.99
    Save $56
    The previous price was $189.99
  7. Anker - SOLIX Everfrost 2 Electric Cooler Removable Battery with 288 Wh,Refrigerator & Freezer, Recharged by AC/Car/Solar - Gray

    SKU: JJ858RYRH9

    I love being able to use the battery to charge my phone. Being able to charge the battery without it being connected to the Everfrost 2 cooler is very convenient. ...The battery worked as expected and...

    Product Description

    A removable gray battery providing 288 Wh power for uninterrupted cooling, recharged via AC, car, or solar.
    See all Coolers
    Your price for this item is $199.99
  8. Cricket Wireless - moto g power 2025 128GB - Slate Gray (Cricket)

    SKU: JXHQZGC8PH

    Product Description

    A slate gray smartphone featuring a 6.8" FHD+ display, 128GB storage, 5G, and Dolby Atmos audio.
    See all Samsung Galaxy S Series
    Your price for this item is $79.99
  9. SOUNDBOKS - THE BATTERY- Portable Bluetooth Speaker Recharageable Battery - Black

    SKU: C9S3WZ3GP3

    Perfect battery...I got a backup if I ever need it going for over 6 hours. The battery seriously stays charged longer than it states.

    Product Description

    A rechargeable, swappable black battery offering up to 40 hours of playback for compatible Bluetooth speakers.
    See all Bluetooth & Wireless Speakers
    Your price for this item is $199.99