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Rectangular lithium-polymer battery pack, matte finish, compatible with Sea Dragon lights

NShi

NShi 7.4V 3000mAh lithium-polymer laptop battery SL9831

SKU CH-4N2B-NM0VB

Replacement lithium-polymer battery for Sea Dragon dive lights, 7.4V 3000mAh 22.2Wh with overcharge and short-circuit protection

  • Battery TypeLithium Polymer
  • Replaces original Sea Dragon SL9831 battery exactly
  • 4 V 3000 mAh 22.2 Wh lithium-polymer power
  • Built-in overcharge over-discharge over-voltage short-circuit protection
  • Certified ISO9001 RoHS CE UN38.3 MSDS compliant
  • Compact 75.44 x 39.7 x 21.2 mm 181.4 g design

Replacement battery for Sea Dragon lights

The NShi SL9831 is a 7.4V 3000mAh lithium-polymer pack built to match the original specifications for Sea Dragon dive lights including the 3000, 2500, 2100SF, 2000, 1500 and 1200 models as well as the Fluoro-Dual Beam and SL983 and SL984 units. It carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications and includes overcharge, over-discharge, over-voltage and short-circuit protection.

Fits existing housings without modification

The pack measures 75.44 by 39.7 by 21.2mm and weighs 181.4g so it slides into the same battery compartment used by the original SL9831 cell. No adapter cables or firmware updates are required; the connector and voltage are identical to the factory part. Buyers who need a different voltage or a higher capacity pack will not be served by this model.

Low self-discharge and stable output

Lithium-polymer chemistry delivers a steady 7.4V nominal voltage across the 22.2Wh capacity with minimal self-discharge during storage. The integrated protection circuit prevents thermal runaway and limits current spikes so the light runs cool and quiet on every dive. No active cooling or external power regulation is needed.

Highlights

  • Replaces original Sea Dragon SL9831 battery exactly
  • 4 V 3000 mAh 22.2 Wh lithium-polymer power
  • Built-in overcharge over-discharge over-voltage short-circuit protection
  • Certified ISO9001 RoHS CE UN38.3 MSDS compliant
  • Compact 75.44 x 39.7 x 21.2 mm 181.4 g design

Specifications

Battery TypeLithium Polymer

Questions about this item

How long will the 3000 mAh capacity keep a Sea Dragon 3000 running before the voltage drops?

The 22.2 Wh rating at 7.4 V delivers 3000 mAh, so a Sea Dragon 3000 draws power until the pack reaches its low-voltage cutoff, typically giving several hours of continuous light output.

Does the pack get hot or make noise when powering a Sea Dragon 2500 all day?

The lithium-polymer cell has no moving parts and the built-in protection board limits current, so it runs silently and stays near ambient temperature during extended use.

Which Sea Dragon models and part numbers must I already own for this SL9831 pack to fit?

It replaces the SL9831 cell in Sea Dragon 1200, 1500, 2000, 2100SF, 2500, 3000, Fluoro-Dual Beam, SL983 and SL984 lights.

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