A Battery-Powered THIRD LUNG™ with equivalent performance to our gasoline-powered systems. The Sea LiOn™ can run for up to 3 hours with a 2 – 4 diver capacity.
Three divers | Three hours | One battery
- Up to 3 hours run time
- Easy swap lithium ion battery with spring loaded contacts
- Variable speed algorithm – system turns on and off based on diver breathing demands
- Maximum depth selector for higher efficiency modes
- Visible LED battery level indicator
- Total unit weight 53 lb (mounted in pan, with battery)
- Recreational diving performance: 2-4* divers 0-33ft on the Standard package. 2 divers to 60ft with the PRO Package (*with the purchase of the add-a-diver kit)
- An accumulator tank that provides a buffer of air between the compressors available air output and the demand the diver is requiring
- Completely recharge battery in 6 hours with a 24 Volt, 70.4 Ah (1774 Watt-hour) lithium ion battery pack with a 110v/220v charger.
The Sea LiOn™ has equal performance to our gasoline powered systems - without the fuel!
The Sea LiOn™ is the first in its class and leader in:
Innovation in lithium-ion battery technology has advanced to the point where Brownie’s THIRD LUNG™ could modify its current system to adopt the lighter, more powerful lithium-ion batteries.

Fuel-Free Sea LiOn™ Delivers Gasoline-Level Diving Performance
The dial at the top of the system allows you to select your maximum dive depth in order to achiever longer run times. ​Choose between 15, 25, 35, and 65 feet of maximum depth. When the system is switched on, the compressor will pulse on startup to confirm which option has been select.
- One pulse: 15 feet
- Two pulses: 25 feet
- Three pulses: 35 feet
- Four pulses: 65 feet
The voltmeter clearly displays your battery status without getting out of the water.
Impervious to salt water corrosion, the Sea LiOn’s body is constructed from King Starboard and features a sturdy center handle to allow for easy deployment into the water.
With the push of a button, the battery can be easily accessed for a quick swap of a freshly charged battery. The battery compartment is further secured by fasteners that help to reduce water intrusion.
Sea LiOn™ Package Options
Standard Package
- Motor compressor in storage case
- 24 Volt lithium ion battery with charger
- Air intake staff with dive flag
- Flotation tube
- Accumulator tank
- 40 ft main Peleton™ down line
- 2 (ea) Y-Dividers
- 3 (ea) 20 ft individual diver hoses
- 3 (ea) low pressure regulators
- 3 (ea) Brownie’s drop weight Cummerbelts
- Brownie’s Deluxe mesh gear bag

PRO Package
- Everything included in the Standard Package, plus:
- All PRO Packages include a 60 ft main Peleton™ down line (substitute for 40 ft in standard package)
- 3 (ea) SEAC® Sub wrist computer
- 3 (ea) Spare Air® add-on package

– Robert Carmichael, Chairman, Brownie’s Marine Group, Inc.
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