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FOSSIBOT FB3840 3840Wh Battery
Brand: FOSSIBOT
Product Code: FB3840
Availability: 4-6 business days
Planuojama gavimo data po užsakymo: 2026-07-28
Product Code: FB3840
Availability: 4-6 business days
Planuojama gavimo data po užsakymo: 2026-07-28
Ex Tax: 1,065.79€
FOSSIBOT FB3840
The FOSSIBOT FB3840 is an additional battery with a capacity of 3840 Wh, designed to work with the FOSSIBOT F3600 Pro charging station. The LiFePO4 cells used ensure high durability and over 6,500 charge cycles down to 50% of initial capacity, translating to many years of use. The module allows you to expand the energy storage system up to 11,520 Wh by connecting two additional units. The FB3840 can also function as a portable DC power source thanks to its 100 W USB-C, 18 W USB-A, and additional 12V outputs, making it ideal for travel, mobile work, and emergency device power.
Greater capacity for longer device runtimeConnecting the FB3840 battery to the F3600 Pro station significantly extends the runtime of connected devices. One additional unit increases the system’s capacity to 7,680 Wh, while two expansion batteries allow for a total capacity of up to 11,520 Wh. This solution works well in RVs, at the cottage, while camping, or as a backup power source at home. Thanks to the high capacity, users can enjoy electronics, lighting, and everyday devices for longer without having to frequently recharge the entire system.
Wide selection of ports and convenient device power supplyThe FB3840 is equipped with a set of practical DC ports that allow for direct powering of many devices without the need for additional adapters. Users have access to USB-C and USB-A ports, a 12V/10A cigarette lighter socket, a 12V/25A XT-60 output, and DC5521 ports. This allows the battery to power smartphones, laptops, LED lights, portable coolers, fans, and equipment used in motorhomes and RVs. The 100W USB-C port allows for fast charging of modern laptops and mobile devices, enhancing the comfort of working outside the home or office. Powering 230V AC devices is possible by connecting the battery to a compatible FOSSiBOT F3600 Pro station.
Robust construction and safe operationThe FB3840 is designed for regular use in various conditions. The housing features a clear LCD display showing the charge level and current operating parameters of the device. The built-in BMS system monitors the battery’s operation and protects it against overheating, overloading, overvoltage, short circuits, and over-discharge, which helps enhance safety during daily use. Despite its high capacity, the device remains portable, and comfortable handles facilitate transport. The ability to charge and discharge simultaneously further enhances the functionality of the entire power system.
Efficient power system with simultaneous operation and chargingThe FOSSiBOT FB3840 supports simultaneous charging and discharging, allowing it to continuously power connected devices while recharging. A clear LCD display shows the charge level and input and output parameters in real time, making it easy to monitor the operation of the entire unit. The unit, measuring 60.9 × 32.1 × 47.5 cm and weighing 42 kg, is designed for stable operation both at home and during off-road use.
Included- FOSSiBOT FB3840 battery
- Parallel connection cable
- Leather handle covers
- User manual
| Manufacturer | FOSSiBOT |
|---|---|
| Model | FB3840 |
| Capacity | 3840 Wh |
| Battery type | LiFePO4 |
| Lifespan | over 6,500 cycles (to 50% of initial capacity) |
| Compatibility | FOSSiBOT F3600 Pro |
| Expandability | up to 2 additional FB3840 batteries |
| USB-C Ports | 3 x PD20W, 1 x PD100W |
| USB-A Ports | 2 x QC3.0 18W |
| Cigarette lighter socket | 12V/10A |
| XT-60 output | 12V/25A |
| DC5521 ports | 2 x 12V/3A |
| Display | LCD |
| Weight | 42 kg |
| Dimensions | 60.9 × 32.1 × 47.5 cm |
| Operating temperature | 0°C ~ 40°C |
| Certifications | FCC, CE, PSE, RoHS, UN38.3, MSDS |
Claim orders from Stores
You can claim your purchased items within 1 - 4 work days after making an order (if product is in local warehouse).
Please wait for an email notification regarding Your order status update.
Vilnius Store address: Vytenio g. 20, LT-03229 Vilnius, Lietuva
Kaunas Store address: Pramonės pr. 4D, LT-51329, Kaunas, Lietuva
Local delivery in Lithuania
Purchased items are delivered locally through Venipak service. Depending on availability of items, orders are processed within 1-3 work days. Orders made until 1AM are shipped the same day.
Local delivery (1-4 w.d.) price for items of any size is through through courier service is 4.90€ (incl. VAT), if the amount of the shopping cart exceeds 150€ - delivery is free.
Local delivery price to Venipak parcel terminals (1-3w.d.) is 2.90€ incl. VAT, if the amount of the shopping cart exceeds 50€ - delivery is free.
Local delivery price to Omniva parcel terminals (1-3w.d.) is 3.90€ incl. VAT,if the amount of the shopping cart exceeds 70€ - delivery is free.
Payment on delivery (COD) +2.00€ (incl. VAT).
You can pay for the goods at the time of delivery to the courier in cash or by credit card. Payment to Omniva parcel terminals is only possible by bank card.
A separate delivery fee applies to oversized items, regardless of the amounts and conditions stated above.
International delivery pricing through courier service
International shipping prices depend on geographic location:
Latvia - 5.50€ (incl. VAT)
Estonia - 6.50€ (incl. VAT)
Paid orders of more than 150€ are shipped for free to Latvia and Estonia.
other countries - negiotiated individually.
International delivery pricing to Omniva/Venipak parcel terminals
Latvia - 6.00€ (incl. VAT)
Estonia - 8.50€ (incl. VAT)
Payments:
We accept payments via PayPal for orders over 20€.
