Sea Tek Marine in Marathon, Florida offers advanced Lithium battery technology for off-grid marine systems.

More power in less space and weight.

Lithium Iron Phosphate (LiFeMnPo4)battery technology offers superior energy density, charge times, discharge capacity, and longevity all in less weight and space than conventional electrolyte batteries. The results are smaller battery banks delivering more power, or dramatically more capacity in the same space as your existing batteries.

Lithium Batteries

Our batteries come in 4-cell, 200AH packs that can be combined to suit any application. All cabling and monitoring circuitry is mounted on the ends of the packs, protected by in-molded tabs and plastic cover plates.


Nominal Voltage 12.8V (4X 3.2 V)
Nominal Capacity 200 Ah per pack
Chemistry LiFeMnPO4
Operation Voltage Range 11.2 to 14.4V
Weight 24.9 kg or 55.0 lbs
Dimensions 500 X 259 X 142 mm or 19.25 X 10.2 X 5.5 in
Max Charging Current 3x Rated Capacity (600A for a 200Ah pack)
Max Discharge Current 3x Capacity (continuous), 10x Capacity (pulsed)
Cycle Life >2000 (80% Depth Of Discharge)
Operating Temperature -20 to 65 C or -4 to 149 F
Self Discharge Rate <3% monthly


Lithium ion batteries differ in many ways from conventional electrolyte batteries, but that doesn’t mean integrating them into your existing systems will be a headache. While we recommend high-output chargers to get the most out of your lithium batteries, standard smart chargers and distribution systems are easily compatible with these packs. Our experienced team will be there every step of the way ┬áto ensure that your new batteries integrate smoothly into your existing systems.

Ready to make the switch? Have questions? Drop us a line with the easy contact form below.
Or give us a call at 305 942 4026