Underwater Battery Canisters

RBRfermata & RBRfermette³

This battery canister, rated to 750dbar, is capable of extending deployments for all RBR instruments and any other devices requiring a nominal 12V supply. Four MCBH connectors are mounted on the top end-cap, and the battery pack design includes 56 D-cells, soldered with reverse- and short-circuit protection, in a single wrapped pack.

The RBRfermata prolongs the life of all deployments by providing 1kWh of power to any underwater instrument. For standard RBR instruments, this is approximately a 40x improvement to our extended battery carriage capacity.

As an alternative, you can also extend your deployments using the compact RBRfermette³. Featuring a single MCBH connector, this battery canister accommodates 8 AA cells.

Drawings for the battery packs are available to aid local sourcing, particularly in the case of lithium packs (which further increase the autonomy).

  • 56 D-cell capacity (1kWh nominal)
  • Full diode and fuse protection
  • Pressure relief valve in bottom end-cap
  • Four MCBH connectors for distribution
  • Freely available battery pack drawings
  • Alkaline and lithium variants available
  • 8 AA cell capacity (24Wh – 60Wh nominal)
  • Single MCBH connector for distribution
Height 658mm
Diameter 140mm
Weight ~15kg (including batteries)
Power 56 alkaline D cell packs (arranged as 8 diode-isolated 12-V batteries)
Depth Rating 750m, 600m, 10,000
Capacity 1kWh (alkaline), temperature dependent
Material POM or titanium with SS-316 hardware
Size 340mm x 63.25mm diameter
Weight 960g in air, 430g in water (including batteries)
Power 8 AA cells
Depth Rating 750m
Capacity 24Wh
Material POM or titanium

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