BatteryJack inc. KNB-33L 7.4V 1800mAh two-way radio battery

Reliable power for Kenwood handhelds

The BatteryJack KNB-33L is a 7.4V 1800mAh lithium-ion pack built for Kenwood TK-2180, TK-3180 and TK-5210 series portable radios. It supplies the voltage and capacity those models expect, keeping communication equipment running during shifts or outdoor work. The cell chemistry matches the original specification so the radio’s charge indicator and protection circuits operate normally.

1800 mAh capacity with drop-rated durability

At 1800 mAh the pack delivers a full day of typical transmit and receive cycles before needing a recharge. The supplier states the housing survives six drops from six feet onto all six sides without breakage or power loss, giving a practical margin against knocks on job sites or in vehicles. Runtime will fall short for users who need multi-day operation without access to a charger.

Direct replacement that frees you from OEM pricing

The battery slides into the radio’s existing latch — no adapter, soldering or firmware update required. Because it meets the same electrical and mechanical spec as the original KNB33, it works with existing single-bay or multi-bay chargers already in the fleet. Buyers who need a higher-capacity pack or a different voltage for another radio family will need a different model.