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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 $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. ...Extra Smart Battery...The smart battery is great. Was real easy to click it into my Delta Max main battery.

    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 $1,399.00
  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