
Firefly Carbon Foam Batteries
The ONLY carbon foam battery on the marketFirefly “Oasis” Battery
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- Available in size G31 -12V, 116Ah, 13.6″ x 6.7″ x 9.4″
- Available in size L16 – 4V, 450Ah, 10.5″ x 6.9″ x 17.2″
- Unparalleled resistance to sulfation
- 2-3 X the cycle life of other deep-discharge batteries
Firefly’s Performance in Independent Testing
Independent PSOC Testing by Compass Marine
In independent PSOC (Partial State Of Charge) testing of AGM batteries done by Rodd Collins of Compass Marine for Practical Sailor, the Firefly AGM was the only AGM to regain FULL capacity after 30 PSOC (one month) of cycle testing. For a full description of the testing procedure, see:
Click on the graph to the right to see how Firefly performed after 30 cycles of “abuse” during the testing:
Nigel Calder's analysis after a season with Firefly batteries
While these batteries had proven their resilience since their inception in multiple land-based applications, the first well-documented field test of the battery in the marine environment was done in the summer of 2014 by Nigel Calder. As a marine systems guru and author of the Boatowner’s Mechanical and Electrical Manual, Nigel Calder’s opinion is respected by boaters world wide. He has commented on his first season of use as well as followed up with a report on their performance after a winter of storage at 38% state of charge.

Charge Characteristics by Coastal Climate Control
The experts at Coastal Climate Control put together this graph showing the difference in performance between Firefly and a slightly smaller sized, new, high-quality, marine AGM battery. The graph shows that the Firefly battery can accept a higher charge for longer and the current tapers more slowly than the competition.