Firman - B104201 Zero-E +1000 1040Wh Lithium Iron Phosphate Expansion Battery Pack with USB-C 100W Output (1040 Wh Capacity) - Black
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About This Item
- Key Specs
- Capacity: 1040 watt hours
- Cycle Life: 4000
- Maximum Battery Life: 21 hours
- General
- Brand: Firman
- Model Number: B104201
- Product Name: B104201 Zero-E +1000 1040Wh Lithium Iron Phosphate Expansion Battery Pack with USB-C 100W Output
- Color: Black
- Performance
- Capacity: 1040 watt hours
- Cycle Life: 4000
- Maximum Battery Life: 21 hours
- Battery Chemistry: Lithium-iron phosphate
- Maximum Runtime At Full Load: 1 hours
- Voltage Rating: 120 volts
- Power Input
- Maximum Input Power: 400 watts (The maximum amount of power allowed to come into the device.)
- Maximum Input Voltage: 70 volts
- Maximum Input Amperage: 10 amperes (The maximum amount of amperage allowed to come into the device.)
- Power Output
- Power Supply Output: 1 x USB-C (The connector type(s) used by the device to send electrical power to another device.)
- Number Of Devices Charged Simultaneously: 1
- Rated Wattage Continuous: 2000 watts
- Rated Wattage Peak: 4000 watts
- Dimensions
- Product Height: 8.3 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
- Product Width: 10.6 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
- Product Length: 15.4 inches (The out of box length of the item. Length is measured as the longest dimension of the item.)
- Product Weight: 28.6 pounds (The out of box weight of the item.)
- Features
- Signwave Inverter: true
- Control Panel: false
- Warranty
- Warranty - Parts: 2 years
- Warranty - Labor: 1 year
- Other
- UPC: 840876105016
Extend your power with the Firman Zero-E B104201 Expansion Pack +1000. Adding 1040Wh of capacity to your Zero-E Power Station, this slide-lock battery pack connects seamlessly — stack up to 10 packs for a total of 11,440Wh. Built with Lithium Iron Phosphate (LFP) technology, it delivers over 4,000 charge cycles for long-term reliability. Use it independently with its built-in 100W USB-C port, or combine with your Zero-E system for serious backup power. Lightweight, safe, and versatile, the B104201 keeps your essentials running during outages, road trips, or off-grid living.
- Expandable Backup Power: Add 1040Wh per pack and stack up to 10 batteries for a massive 11,440Wh total capacity.
- Safe Lithium Iron Phosphate Technology: Depend on LFP chemistry with 4,000+ cycles, ensuring long-lasting, safe, and stable energy.
- Built-In USB-C 100W Port: Charge laptops, tablets, and devices directly with a high-speed 100W USB-C PD in/out port.
- Easy Slide-Lock Connection: Expansion is effortless — simply slide the pack into place until it clicks, no tools required.
- Lightweight & Portable Design: At only 28.6 lbs, the Zero-E Expansion Pack is compact and easy to move wherever extra power is needed.
Product Manuals
Disclaimers
- This product is non-returnable once purchased.
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Extend your power with the Firman Zero-E B104201 Expansion Pack +1000. Adding 1040Wh of capacity to your Zero-E Power Station, this slide-lock battery pack connects seamlessly — stack up to 10 packs for a total of 11,440Wh. Built with Lithium Iron Phosphate (LFP) technology, it delivers over 4,000 charge cycles for long-term reliability. Use it independently with its built-in 100W USB-C port, or combine with your Zero-E system for serious backup power. Lightweight, safe, and versatile, the B104201 keeps your essentials running during outages, road trips, or off-grid living.

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