Description
Battery-powered freedom for the whole dive crew
More diving. No gasoline required.
Sea LiON delivers variable-speed breathing air from a rechargeable floating system built for boat days, beach dives, lobster season and underwater adventures with friends.
50Ah or 70Ah
Variable-speed air
Swappable battery
More time in the water. Less fuss on deck.
Charge it, launch it and dive
Sea LiON replaces gasoline, pull-starting and exhaust with rechargeable battery power. Its floating design keeps the compressor and breathing-air system at the surface while your crew explores below.
Rechargeable power
Start the system with the push of a button—no fuel can or pull cord required.
Variable-speed performance
The compressor responds to air demand and shuts off at its pressure setting to conserve energy.
Easy battery swaps
Add a spare battery and exchange packs between dives to keep the day moving.
Made for dive buddies
Bring two, three or even four divers along, depending on depth and breathing demand.
Bring your people
Bring your favorite dive buddies
Every diver position includes the breathing-air equipment needed for that position and a basic tow belt. Each additional-diver setup includes a regulator, 20-foot diver hose, Y-divider and basic tow belt.
Actual depth capability and runtime vary with diver count, breathing demand, conditions and battery selection. Four-diver use is limited to 10–15 ft maximum.
Power your kind of dive day
Choose the runtime and gear your crew wants
Start with a complete two-diver Sea LiON, then match the battery, diver equipment and optional Safety Package to the way you plan to dive.
Choose your battery
50Ah: approximately 2 hours 15 minutes.
70Ah: approximately 3 hours and replaces the included 50Ah battery.
Bring the crew
Equipment for two divers is standard, with complete setups available for a third or fourth diver.
Keep diving
Add a spare 50Ah or 70Ah battery, complete with its own charger and protective case.
Equip every diver
The Safety Package pairs every selected diver with a Spare Air Add-On Kit and SEAC Screen computer.
See the choices at a glance
Sea LiON pricing
Every starting price below includes the Sea LiON, a 50Ah battery and charger, standard downline, basic gear bag, and complete equipment with basic tow belts for the selected number of divers.
| Diver configuration | System price | Matching Safety Package | System + Safety | Bundle savings |
|---|---|---|---|---|
| 2 divers | $5,900 | $1,290 | $7,190 | — |
| 3 divers | $6,300 | $1,600 | $7,900 | Save $335 |
| 4 divers 10–15 ft max | $6,700 | $2,245 | $8,945 | Save $335 |
Runtime estimates vary with depth, number of divers, breathing demand, conditions and battery age. Prices shown reflect the current product configuration and may change.
Confidence for every diver
Backup air and dive information within reach
Choose the Safety Package to equip every person in your selected diver group with compact independent backup air and an easy-to-read dive computer.
The Safety Package is supplemental equipment. It does not replace training, proper dive planning or the need for every diver to remain prepared to make an emergency ascent.
Air on demand, pressure in reserve
Why Sea LiON uses an accumulator tank
Sea LiON’s variable-speed compressor can turn off when the system reaches its pressure setting, helping conserve battery energy. The accumulator tank acts as an air buffer: divers breathe from the stored volume while the compressor responds and fills the tank back up.
Battery-powered compressor cycles with demand. The accumulator smooths the transition and maintains a reserve volume between compressor cycles.
The direct-drive compressor runs continuously whenever the engine is running, so it supplies air continuously and does not need the same cycling buffer.
What comes standard
A complete two-diver starting point
- Sea LiON floating battery-powered compressor system
- Accumulator tank
- 50Ah battery and charger
- Standard downline
- Equipment for two divers
- Two basic tow belts
- One basic gear bag
Brownie’s Drop Weight Cummerbelts are currently out of stock and cannot be added at this time. Every diver kit comes with a basic tow belt, making the system complete and ready to use.
Current production models may not include a depth-selector switch.
A smarter lift from storage to water
Split the weight before you carry it
The Sea LiON is approximately 53 lb assembled in its pan with a battery installed, depending on battery and configuration. The battery removes from the system, allowing you to carry the battery and floating unit separately instead of lifting everything at once.
A gas-powered floating system’s engine and compressor remain together as one lifting assembly. Sea LiON’s removable power pack makes loading, unloading and battery changes easier to manage.
Approximate operating weight is different from packaged shipping weight and varies with configuration.
Choose exact quantities
Add Individual Equipment
Need a different quantity than the Safety Package or diver selection provides? Add individual equipment to your order.
Add-a-Diver Kit
Add the hose, regulator, connection and basic tow belt required to equip another diver.
Spare Air Add-On Kit
Includes a 3-cubic-foot Spare Air package and attachment sleeve for a Brownie’s cummerbelt.
SEAC Screen Computer
Add clear, wrist-mounted dive information for each diver in your crew.
Deluxe Gear Bag
Add a more durable gear bag with upgraded material and improved equipment organization. The intake staff stores inside with the rest of the gear.
What makes a Brownie’s a Brownie’s?
Made for real boats and real dive days
Sea LiON combines rechargeable power with the practical equipment, connections and support Brownie’s owners have relied on for generations.
Air Stays on the Surface
Keep bulky scuba cylinders off the deck while divers receive air through individual hoses.
Variable Speed + Air Buffer
The compressor responds to demand while the accumulator provides breathing-air volume between cycles.
Quick-Release Connections
Brownie’s QRS fittings make hoses and diver equipment fast to connect, disconnect and organize.
Swap Power and Keep Diving
Bring a charged spare battery and exchange packs between dives without replacing the whole system.
Equipment for a Crew
One floating platform can support multiple divers when configured for the conditions and breathing demand.
Parts and Service Support
Replacement parts are available, and Brownie’s service centers can support maintenance and repairs.
Built for a crew
One floating system. Individual air lines.
Brownie’s Peleton-style hose arrangement keeps each diver connected through an individual hose while the Sea LiON stays at the surface. Quick-release fittings make it straightforward to add, remove and organize diver equipment.
See how it comes together
Brownie’s Third Lung setup
Watch the setup process before your first dive, then follow the current manual and training for your specific system.
Preparation matters
Train, Plan and Be Ready
Breathing underwater involves inherent risk. Proper instruction, maintenance, dive planning and emergency preparation are essential.
Get Properly Trained
Divers should receive appropriate training, follow current Brownie’s instructions and stay within the limits of their training, experience and equipment.
Every diver should remain prepared to make an emergency ascent.
Consider Independent Backup Air
For dives beyond a depth at which a diver is personally comfortable making a controlled free-swimming ascent, many experienced divers carry an independent emergency breathing source.
Spare Air kits can be selected in the Safety Package or purchased individually.
Prefer a different kind of system?
Explore more ways to dive with Brownie’s
Choose the power source, installation style and portability that best match your boat and dive plans.
The OG Gas System
Choose the classic floating Brownie’s with gasoline power, direct-drive simplicity and equipment for a multi-diver crew.
Brownie’s BIAS
Move the compressor below deck for a clean, ready-to-use system integrated into your vessel.
BLU3 Nomad
Go smaller and lighter with a compact, single-diver battery-powered system designed for portability.
Charge it. Launch it. Dive it.
Make the water your playground
Bring your crew and turn the next boat day, beach day or lobster trip into an underwater adventure.
