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Rectangular lithium-ion battery pack, dark grey plastic casing with gold contacts and printed labels

BatteryJack inc.

BatteryJack inc. 1800mAh KNB-33L Battery for Kenwood TK-2180K2 TK-3180K2 TK-5210K2 TK-5310K2 two-way radio

SKU CH-PTX7-F4WA4

1800 mAh 7.4 V lithium-ion replacement battery fits Kenwood TK-2180, TK-3180, TK-5210 and TK-5310 series radios

  • 1800mAh capacity keeps Kenwood radios transmitting longer
  • 4V Li-ion chemistry matches original KNB-33L specifications
  • Drop-tested from 6 feet on all sides for rugged durability
  • Compatible with TK-2180, TK-3180, TK-5210 and TK-5310 series
  • 18-month warranty backs reliable everyday performance

Compatible Kenwood Radio Models

This 1800mAh KNB-33L battery fits Kenwood TK-2180, TK-3180, TK-5210 and TK-5310 series portable two-way radios. It replaces the OEM KNB33 pack at 7.4V using Li-Ion chemistry. The Titan brand unit is built to meet or exceed original specifications for direct replacement.

Drop-Tested Durability For Field Use

The pack survives six drops from six feet onto all sides without breakage or power loss. This suits crews working in construction, security or marine environments where radios take regular impacts. Buyers needing a lighter slim-line pack or a higher capacity cell for multi-day shifts should look at other options.

1800mAh Capacity Decides Runtime

The 1800mAh rating determines how long the radio transmits and receives between charges. Users running high-power channels or constant duty cycles will drain the pack faster than light-duty operators. Match the milliampere-hour figure to your shift length before ordering.

Highlights

  • 1800mAh capacity keeps Kenwood radios transmitting longer
  • 4V Li-ion chemistry matches original KNB-33L specifications
  • Drop-tested from 6 feet on all sides for rugged durability
  • Compatible with TK-2180, TK-3180, TK-5210 and TK-5310 series
  • 18-month warranty backs reliable everyday performance

Specifications

No published specifications for this item yet.

Questions about this item

Which Kenwood radios will the 1800mAh KNB-33L battery power?

The battery fits Kenwood 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 models.

Will the 7.4V 1800mAh Li-Ion pack work with an older KNB33 charger I already own?

Yes, the replacement meets or exceeds OEM specifications for the KNB33 form factor, so existing chargers that support the original KNB33 will charge this pack.

How can I confirm the 1800mAh KNB-33L is delivering full capacity after the first charge?

Insert the battery, power on the radio and verify the fuel gauge shows a full charge icon; then transmit on a clear channel — strong, clear audio and stable voltage indicate the pack is performing to its rated 1800mAh.

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