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Rectangular lithium-ion battery pack with textured dark casing and gold contacts

BatteryJack inc.

BatteryJack inc. KNB-33L Li-ion Battery Pack 7.4V 1800mAh

SKU CH-F81R-J58P5

Lithium-ion 7.4 V 1800 mAh pack powers compatible Kenwood two-way radios

  • Drop-tested from 6 ft on all sides for rugged reliability
  • 4 V 1800 mAh capacity powers compatible Kenwood radios
  • Fits TK-2180, TK-3180, TK-5210 and TK-5310 series models
  • 18-month warranty backs long-term performance
  • Built with highest-grade cells for consistent output

Compatible Kenwood Radios

The KNB-33L lithium-ion battery pack delivers 7.4 volts and 1800 milliampere-hours of capacity for a wide range of Kenwood portable two-way radios. Supported models include the TK-2180 series, TK-3180 series, TK-5210 series and TK-5310 series. It is built with high-grade cells and designed to meet or exceed original equipment specifications for reliable communication in marine and automotive environments.

Replaces KNB33 Original Pack

This pack directly replaces the Kenwood KNB33 battery used in the compatible radios listed above. The upgrade is worthwhile when the original cell no longer holds a full charge or when a spare is needed for extended shifts. An eighteen-month warranty backs the replacement, and the rugged construction survives six drops from six feet on every side without loss of power.

Verify Radio Model Before Ordering

Confirm that your radio model appears in the supported list before purchasing. The pack fits only the specific Kenwood TK-2180, TK-3180, TK-5210 and TK-5310 variants shown in the compatibility data. It will not work with radios outside this range or with other manufacturers' equipment.

Highlights

  • Drop-tested from 6 ft on all sides for rugged reliability
  • 4 V 1800 mAh capacity powers compatible Kenwood radios
  • Fits TK-2180, TK-3180, TK-5210 and TK-5310 series models
  • 18-month warranty backs long-term performance
  • Built with highest-grade cells for consistent output

Specifications

No published specifications for this item yet.

Questions about this item

Which Kenwood radio models accept the KNB-33L 7.4V 1800mAh pack?

The pack fits TK-2180, TK-2180K, TK-2180K2, TK-3180, TK-3180K, TK-3180K2, TK-5210, TK-5210G, TK-5210GK, TK-5210GK2, TK-5210GK3, TK-5210GK7, TK-5210K, TK-5210K2, TK-5310, TK-5310G, TK-5310GK, TK-5310GK2, TK-5310GK3, TK-5310GK4, TK-5310GK5, TK-5310GK6, TK-5310GK7, TK-5310K and TK-5310K2.

How do I install the battery without damaging the latch?

Align the pack rails with the radio guides, slide it in until the latch clicks once, then tug gently to confirm it is locked; forcing it sideways bends the plastic catch.

When should I replace the pack based on the rated cycle life?

Plan a replacement after roughly 18 months of daily charge cycles or when run-time drops below 80 % of the original 1800 mAh capacity.

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