FOSSiBOT FB3840 Expansion Battery, 3840Wh LiFePO4 Battery Pack for F3600 Pro, 6500 Cycle, Fast Charging

Availability date: 10-06-2026

1 199,00 €

-210,00 €

1 409,00 €

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4,7
  • Plug and play expandable power design, to solve the power reserve needs of large camping, family energy storage and other scenes.
  • Designed for FOSSiBOT F3600 Pro, it can be expanded with two FB3840s for a total power of 11520Wh.
  • After 6500 times of charging and discharging, there is still 80% of healthy design power, lower long-term use cost, suitable for frequent charging and discharging needs.
  • Support 200W solar charging and standard AC charging, meet the outdoor adventure and home emergency needs.
  • Equipped with dual fast charging ports, it can quickly power high power consumption devices and shorten the charging waiting time.

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FOSSiBOT FB3840 Expansion Battery, 3840Wh LiFePO4 Battery Pack for F3600 Pro, 6500 Cycle, Fast Charging
1 199,00 € 1 409,00 €
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FOSSiBOT SP420 420W Portable Foldable Solar Panel, 23.4% Conversion Efficiency, IP67 Waterproof
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Total price: 459,00 €

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Description

Reviews

FOSSiBOT FB3840 Expansion Battery, 3840Wh LiFePO4 Battery Pack for F3600 Pro, 6500 Cycle, Fast Charging

 

Exceptional 3840Wh LiFePO4 Battery

The FOSSiBOT FB3840 expansion battery boasts a high-capacity 3840Wh LiFePO4 battery, ensuring stable and safe operation with an impressive lifespan of 6500+ charge/discharge cycles. Perfect for extending the runtime of your F3600 Pro portable power station.

Solar Charge & AC Charge

Enjoy the flexibility of charging your FB3840 expansion battery either via 200W solar power or through a standard AC outlet. This dual-charging capability makes it ideal for both off-grid adventures and home use.

Rapid and Convenient Power Delivery

The FB3840 expansion battery is equipped with fast charging ports, including an 18W USB-A and a 100W Type-C output, allowing you to charge your devices quickly and efficiently. 

Seamless Compatibility with FOSSiBOT F3600 Pro

Designed specifically for the FOSSiBOT F3600 Pro portable power station, this smart battery pack seamlessly integrates to enhance your existing power supply. Expand your power capabilities effortlessly.

Upgrade Your Power Experience

Transform your F3600 Pro into a powerhouse with the FB3840 expansion battery. This upgrade increases your overall power capacity, making it a must-have for extended camping trips, emergency preparedness, or any scenario requiring reliable backup power.

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4,7

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on 27 May 2026

Got this battery for extra power during camping trips, and it’s been really solid so far. It’s super easy to set up, basically just plug and go, which makes it perfect for someone like me who doesn’t want to fuss over technical stuff. Love how it handles frequent charging without losing much capacity over time—feels like you’re getting your money’s worth long-term. The charging speed is great too, both with solar panels and the regular outlet. If you’re thinking about backup power for home or outdoor adventures, this one’s pretty reliable. Only wish it was a little lighter to carry around.

By (Germany) , on 27 May 2026
on 24 May 2026

Power for days

By (Netherlands) , on 24 May 2026
on 01 July 2025

This power solution is a game-changer for anyone who loves camping but hates worrying about running out of juice for all their gear. It's super easy to expand if you need more power, and the solar charging option is just so cool for those remote spots. Plus, don't worry about the battery getting worn out too quickly—it's built to last even with regular use.

By (Germany) , on 01 July 2025
on 27 May 2026

Werkt prima, soms traag

By (Netherlands) , on 27 May 2026
on 27 May 2026

Super praktisch, wenn man mal mehr Saft braucht! Hab's für längere Campingtrips und als Backup für zuhause geholt. Der Aufbau war wirklich simpel, einfach dran und los. Hält ewig, was den Akku angeht – das beruhigt ungemein, wenn man es oft nutzt. Laden geht flott, sowohl an der Steckdose als auch mit dem Solarpanel. Einziger kleiner Wermutstropfen: Ist ganz schön schwer, aber bei der Kapazität kein Wunder. Der Kundenservice war übrigens top, sehr hilfsbereit und schnell, als ich eine Frage hatte.

By (Germany) , on 27 May 2026
on 24 May 2026

Werkt zo lang, bijna eeuwig!

By (Belgium) , on 24 May 2026
on 24 May 2026

Für alle, die ihre Powerstation aufrüsten wollen: Das Ding ist ein echter Gamechanger. Die Kapazität ist einfach mega, man fühlt sich bei langen Campingtrips oder als Notstromlösung zu Hause viel sicherer. Der Akku hält ewig, das spart auf Dauer echt Kohle. Laden geht flott, sowohl an der Steckdose als auch mit Solar, super praktisch. Einziger kleiner Wermutstropfen: Das Teil hat schon ein bisschen Gewicht, aber für so viel Saft ist das verständlich. Die Lieferung war unkompliziert und pünktlich, vielleicht beim nächsten Mal die Verpackung noch etwas griffiger gegen Transportspuren.

By (Austria) , on 24 May 2026
on 01 July 2025

Super praktisch für Camping und zu Hause, hält ewig und lädt schnell. Genau das, was ich brauche!

By (Germany) , on 01 July 2025
on 01 June 2025

Deze plug and play uitbreidbare stroomontwerp is echt een game-changer! Het is perfect voor grote kampeer- en familiestroomopslagbehoeften. Na 6500 keer opladen en ontladen is er nog steeds 80% van de gezonde ontwerpstroom over, wat betekent dat het echt lang meegaat. Ik vind het geweldig dat het ook 200W zonne-opladen ondersteunt, waardoor het perfect is voor buitenavonturen en noodsituaties thuis. Absoluut een aanrader!

By (Netherlands) , on 01 June 2025
on 01 June 2025

Super praktisch für Camping und zu Hause, hält ewig und lädt schnell. Einfach perfekt!

By (Austria) , on 01 June 2025
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