Replace the original
Use it as a direct replacement if the battery box supplied with your FluxJet is damaged or lost.
FluxJet replacement power enclosure
A Pre-Wired Spare That Matches Your Original Box
This is the same Group 31 battery-box setup supplied with a FluxJet kayak. It arrives with FluxJet power cabling and an integrated circuit breaker, ready to replace a damaged or missing original or serve as a backup.
- Based on the NOCO BG31 Group 31 enclosure
- Pre-wired with FluxJet power cabling
- Integrated circuit breaker
- Secure lid and retaining strap
What is included
Box, Cabling, Breaker, Lid, and Strap
The enclosure is prepared for the FluxJet power system. The battery itself is not included and must be selected separately.
- Enclosure Water-resistant NOCO BG31 construction for Group 31 batteries
- Connections Pre-installed FluxJet power cabling
- Protection Integrated circuit breaker
- Battery control Internal divider, secure lid, and retaining strap
- Not included Battery and battery charger
Battery fit
Confirm the Battery Dimensions Before You Buy
The box is designed around the Group 31 marine-battery form factor. Battery dimensions can vary by manufacturer, so confirm the actual case measurements before ordering a battery.
Approximate Group 31 dimensions
13 inches long × 6.8 inches wide × 9.4 inches high
Smaller batteries
The internal divider helps secure smaller battery cases inside the enclosure.
Voltage and capacity
Choose these separately based on how you plan to use your FluxJet.
Why keep a spare
Replacement, Backup, or Second-Location Setup
Every FluxJet kayak already includes one battery box. This separate box is for owners who need another complete enclosure.
Keep a backup ready
Store a second pre-wired enclosure with your other FluxJet parts so a damaged box does not keep the kayak off the water.
Set up another location
Keep a second box where you regularly launch or store the kayak, while keeping the battery itself properly stored and maintained.
For help with battery selection, wiring, or installation, use the FluxJet owner resources or contact the FluxJet team before modifying the supplied cabling or breaker.
FluxJet owner resources
Battery Information, Parts, and Support
Battery Guide
Compare battery voltage, capacity, physical fit, and expected use.
Read the battery guideFluxJet Accessories
Browse current replacement parts and accessories for FluxJet kayaks.
View accessoriesOwner Support
Find manuals, how-to information, maintenance resources, and support.
Visit supportBattery box questions
Frequently Asked Questions
Does every FluxJet kayak already include a battery box?
Yes. Every FluxJet kayak includes one battery box with pre-installed cabling. This product is a replacement or additional spare.
Is a battery included with this box?
No. This product includes the enclosure and its installed FluxJet cabling and circuit breaker. The battery and charger are sold separately.
What battery size fits the FluxJet Battery Box?
It is designed for the Group 31 form factor, approximately 13 inches long × 6.8 inches wide × 9.4 inches high. Always verify the actual battery dimensions because cases vary by manufacturer.
Can the box hold a smaller battery?
The enclosure includes an internal divider that helps secure smaller battery cases. Confirm the battery's dimensions and follow the FluxJet instructions for securing it before use.
Does the battery box include a circuit breaker?
Yes. The FluxJet Battery Box comes with pre-installed power cabling and an integrated circuit breaker.
Which battery voltage should I choose?
Voltage and capacity depend on the performance and runtime you want. Review the FluxJet battery guide before buying a battery.
Will the battery box ship separately from my kayak?
If you have a FluxJet on pre-order or backorder, parts normally ship with the kayak. If you want the battery box sent sooner, include that request in the Order Comments.
Need a Replacement Battery Box?
Return to the product area to order the pre-wired FluxJet enclosure, or contact the team if you need help with fit or installation.