Ultralife SeaSafe™
Smart lithium-ion power for underwater systems
- Modular lithium-ion battery systems designed for AUVs, ROVs, MUVs, oceanographic equipment, and subsea oil & gas applications.
- Available in 24V, 30V, and 37V configurations, with flexible series and parallel connectivity for scalable voltage, capacity, and power requirements.
- High-performance platform delivers up to 4x longer runtime than comparable SLA batteries, with high-current options for demanding subsea applications.
- Pressure-tolerant designs rated for depths up to 6,000m, with options for direct-in-water, pressure balanced oil-filled cases, or pressure-vessel installations.
- Patented Battery Management System (BMS) provides continuous safety monitoring, automatic cell balancing, and condition-based battery management.
- ABS and UN 38.3 certified for reliable operation in harsh underwater environments.
Voltage (Choice)
24V / 30V / 37V
Capacity (Range)
28Ah – 47Ah
Energy (Range)
725Wh – 1739Wh
Weight (Range)
7kg – 11.5kg
| Product | Nominal Voltage | Rated Capacity (93% SoC) | Rated Energy (93% SoC) | Weight | Size | Note | Tech Data Sheet |
|---|---|---|---|---|---|---|---|
| SeaSafe™ Direct (10 amp) | 24V | 28Ah | 725Wh | 7.1kg | 254mm H x 203mm L x 74mm W | For use direct in water | SeaSafe™ Specifications |
| 30V | 829Wh | 7.3kg | |||||
| 37V | 1036Wh | 7.8kg | 254mm H x 203mm L x 81mm W | ||||
| SeaSafe™ Direct (40 amp) | 24V | 28Ah | 725Wh | 7.1kg | 254mm H x 203mm L x 74mm W | For use direct in water | |
| 30V | 829Wh | 7.3kg | |||||
| 37V | 1036Wh | 7.8kg | 254mm H x 203mm L x 81mm W | ||||
| SeaSafe™ Direct (20 amp) | 24V | 28Ah | 725Wh | 7kg | 254mm H x 203mm L x 74mm W | Low profile, For use direct in water | |
| 30V | 829Wh | 7.2kg | |||||
| 37V | 1036Wh | 7.7kg | 254mm H x 203mm L x 81mm W | ||||
| SeaSafe™ II (40 amp) | 24V | 28Ah | 725Wh | 7.1kg | 254mm H x 203mm L x 74mm W | Daisy chain, For use in pressure-balanced, oil-filled case | |
| 30V | 829Wh | 7.3kg | |||||
| 37V | 1036Wh | 7.8kg | 254mm H x 203mm L x 81mm W | ||||
| SeaSafe™ Endurance (40 amp) | 24V | 47Ah | 1217Wh | 8kg | 71mm H x 678mm L x 142mm W | 1ATM, For use in pressure vessel | |
| 30V | 1391Wh | 9.2kg | 71mm H x 757mm L x 142mm W | ||||
| 37V | 1739Wh | 11.5kg | 71mm H x 912mm L x 142mm W |
