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BK Technologies (Relm) 4004-40012-603

15V @ 12Ah Li-Ion Battery
For RELM / BK RDPR-00UM universal portable repeater system and KNG-TMR150, KNG-TMR400, KNG-TMR500, KNG-TMR800 radios
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Item SKU Number:  180801
Manufacturer Part Number:  400440012603, 4004 40012 603, 4004-40012-603
FCA point / Shipped from:  USA 



NEVER solder the battery terminals, or NEVER modify the battery pack. This may cause heat generation, and the battery may burst, emit smoke or catch fire.

NEVER leave battery pack in places with temperatures above +60°C (+140°F). High temperature buildup in the battery, such as could occur near fires or stoves, inside a sun-heated vehicle, or in direct sunlight for long periods of time may cause the battery to rupture or catch fire. Excessive temperatures may also degrade battery’s performance or shorten battery life.

NEVER strike or otherwise impact the battery. Do not use the battery if it has been severely impacted or dropped, or if the battery has been subjected to heavy pressure. Battery damage may not be visible on the outside of the case. Even if the surface of the battery does not show cracks or any other damage, the cells inside the battery may rupture or catch fire.

NEVER expose the battery to rain, snow, seawater, or any other liquids. Do not charge or use a wet battery. If the battery gets wet, be sure to wipe it dry before using.

NEVER place or leave battery packs near fire. Fire or heat may cause them to rupture or explode. Dispose of used battery packs in accordance with local regulations.

NEVER use the battery with a transceiver for which it is not specified. Never use a battery with any other equipment, or for any purpose that is not specified in an instruction manual.

NEVER let fluid from inside the battery get in your eyes. If it does, blindness can result. Rinse your eyes with clean water, without rubbing them, and immediately go to a doctor.

NEVER put the battery in a microwave oven, high-pressure container, or in an induction heating cooker. This could cause a fire, overheating, or cause the battery to rupture.

NEVER use the battery if it emits an abnormal odor, heats up, or is discolored or deformed. If any of these conditions occur, contact your dealer or distributor.


 Manufacturer's Catalogs and Guides:

These files contain information about the available products from the manufacturer. If you need something that is not on our website, please contact us. We will help you purchase the desired product at a low price.

BK Technologies Catalog 2023
BKR & KNG Accessory Catalog

Published Date: August 2025
BK Technologies BKR Accessory Catalog 2022.pdf
BKR Accessory Catalog

Published Date: March 2022
BK Technologies All Products Catalog
BK Technologies All Products Catalog

Published Date: April 2025


Relm BK Radio BK Technologies is deeply rooted in the public safety radios and communications Industry and manufactures high specification communications equipment of unsurpassed reliability and value for use by public safety professionals and government agencies, as well as radios for use in a wide range of commercial and industrial applications. Advances include a broad new line of leading digital two-way radios compliant with APCO Project 25 specifications.

BK Technologies two-way radios always incorporates the latest technology. The quality and function of the BK Technologies two-way radio can meet your demands for reliable communication. BK Technologies' products are manufactured and distributed worldwide under Bendix King and Relm brand names.





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