Rakuten Logo
FOSSiBOT FB3840 Expansion Battery - 3840Wh LFP (For FOSSiBOT F3600 Pro)

Product details

5-Year Hassle-Free Warranty Seamless Expansion for F3600 Pro 6,500 Life Cycles and 10-Year Lifespan Features with a 100W USB-C and a 18W USB-A ports,you can use the FB3840 as a portable power station. The FB3840 expansion battery enables it to recharge quickly through solar power at a 200W maximum loading scale.

FOSSiBOT FB3840 Expansion Battery - 3840Wh LFP (For FOSSiBOT F3600 Pro)

$1,099.00$1,999.00
4% Cash Back
Best Price
Shop Now

FOSSiBOT
Sold byFOSSiBOT
FOSSiBOT portable power, solar generators & rugged phones.

Product details

5-Year Hassle-Free Warranty Seamless Expansion for F3600 Pro 6,500 Life Cycles and 10-Year Lifespan Features with a 100W USB-C and a 18W USB-A ports,you can use the FB3840 as a portable power station. The FB3840 expansion battery enables it to recharge quickly through solar power at a 200W maximum loading scale.
*To qualify for a Welcome Bonus, you must be a new member and spend at least $25 before taxes on purchases that are eligible for Cash Back within ninety (90) days of becoming a member.
See full terms
Download Our App
  • Rakuten Mobile Apps
  • Available for iOS and Android

The Rakuten American Express® Card is issued by First Electronic Bank, pursuant to a license from American Express. American Express is a registered trademark of American Express. The Rakuten American Express® Card is powered by Imprint Payments, Inc.
Advertising Disclosure
© 2026 Ebates Performance Marketing Inc., d/b/a Rakuten Rewards
Rakuten Viki