DeepSea Power & Light has taken advantage of recent advances in battery technology to improve their proven SeaBattery. The most recent evolution has increased the storage capacity by almost 10%. This increase expands the 12-volt battery from 76Ah to 84Ah, and the 24-volt battery from 38Ah to 42Ah. What this means to the user is a significant increase in battery life.
DeepSea's SeaBattery has long been recognized as an extremely rugged product. Because of its’ pressure compensating design and robust housing, this battery is rated at full ocean depth. The battery’s durability was witnessed, when 5 batteries attached to a light tower with DeepSea 1200 watt HMI lights were inadvertently dropped during deployment to the RMS Titanic. The light towers fell 2½ miles to the ocean floor, and the equipment was feared lost. Fortunately, the equipment was easily recovered when the manned submersibles finally reached the bottom. They simply turned on the remote switch and the lights shined brightly on the bottom of the ocean. The whole system was moved into position and used for the remainder of the filming.
Typically, these batteries are used for long-term oceanographic deployment, where they will sit at bottom of the ocean providing power to monitoring equipment for months at a time. Or, they will supply power for years to unmanned buoys while on a constant trickle charge.