RELM Replacement Communications Batteries

and Chargers

For Business and Public Safety

(LMR Battery Technology)


This list updated 11/02/2023

These Premium packs are shipped from our USA facility and custom manufactured for us by Multiplier Industries, LLC.

Tired of bad fit and dismal performance? Specify these Premium Packs!

Warranty information at the bottom of the page.

What's the best Battery?

Look for a Li-Po, Lithium Polymer, those are the Best Batteries we have.

No Li-Po, then look for a Li-Ion Battery. Note, to charge Li-Ion or Li-Po, you will need a charger that will charge Li-Ion Batteries.

No Lithium, use a NIMH, No NIMH, use NiCD. Note: NiCd chargers will also charge NIMH.

At This Time, ALL of our Chargers charge NiCD, NIMH, Li-Ion, Li-Po unless otherwise noted.

At this time you can purchase on our Amazon Store, any radio battery, Radio Battery Charger & Radio Holsters and Leather. We are adding the links to the listings.

Of Course your Dept. PO is still welcome and we can bid you a qty of any battery or charger. Just E-mail me direct.

Catalogs, Data Sheets & Fliers


Sandown Wireless P/N Replaces O.E.M. P/N Description List Price Our Price
Two-Way Radio Batteries        
BK Technologies (RELM Radios) RPU3000, RPU3600, RPU36000A, RPV3000, RPV3600, RPV3600A        
CRP1700LI BPRP1700 7.4 Volt, 1700 mAh / Lithium-Ion /  Belt Clip $107.00 $76.25
BK Technologies (RELM Radios) RPU416, RPU499, RPV516, RPV599 BPRP1500 7.2 Volts, 1500 mAh / NIMH / Belt Clip    
CRP1500MH     $76.00 $54.15
BK Technologies (RELM Radios) RPU7500, RPV7500        
CBL1703-1 BPRP1771 7.4 Volts, 1800 mAh / Li-Ion $78.00 $55.58

Charger Accessory Items

Note: Every Make and Model Radio/Battery requires different components.

We must know the Make, Model and Battery P/N in your device in order to quote you for these items.

Some obsolete radios do not have accessories or batteries available any longer.

Please e-mail us for a Quotation.


EC1 Single Cup, 120 VAC, $59.85

(Charger and Power Supply)

EC Charger Video:

User Manual


EC1M Single Cup, 12 VDC, $77.85

(Charger, Mobile Mount Plate and 12VDC Power Cord)

User Manual


EC2 Dual Cup, 120 VAC, $106.20

Mobile Version 12-24 VDC, $192.00

(Charger and Power Supply)

User Manual


EC6 6 Cup, 120 VAC, $375.00

Mobile Version 12-24 VDC, $516.45

(Charger, Power Supply, AC Power Cord)

User Manual


EC6 12 Cup, 120 VAC, $742.50

Mobile Version 12-24 VDC, $856.35

(Charger, Power Supply, AC Power Cord)

User Manual



Single Cup Mobile Mounting Bracket, $24.00

(Supplied with Single Mobile Charger Package)


Dual Cup Mobile Mounting Bracket, $32.00

(Supplied with Dual Mobile Charger Packages)


6 or 12 Cup Mobile Mounting Bracket, $85.00

(Supplied with 6 or 12 Cup Mobile Charger Packages)


Hard Wire Kit for all Models, $26.00

(Optional for the Single or Dual Cup Chargers, Supplied with the 6 or 12 Cup Mobile Models)



DC Power Cord for 1, 2, and 6 Cup Models, $27.00

(Optional for the AC Models, Supplied with single and dual Mobile Chargers)



Replacement Single Charger Cup, $18.00

You Must Specify what the Make. Model and battery P/N is for your radios.


Replacement Dual Charger Cup, $32.00

You Must Specify what the Make. Model and battery P/N is for your radios.

Charger User Manuals (PDF)

EC1    EC2M    EC6M    EC12M


Audio Gear

Call or E-mail for Quotation

ESM-27 Video:

Call or E-Mail for a Quotation


With a well-trained staff and state-of-the-art printing equipment, Power Products can supply
custom labels for select audio accessories. Our process is highly flexible, allowing us to
prepare labels for almost any quantity. Because our artwork is prepared and printed
professionally, we do require extra lead time to get the order shipped.

Contact marketing for more information!

Recommended Chargers - AC & DC

Endura Brand

If We Sell the Battery, we have the Charger.

All these chargers are listed on our Amazon Store or just E-mail Us for a Quote.


Audio Gear

We have Police / Fire Audio gear for All Makes and Models!




NiCD Types:   (1) One Year, Workmanship and Performance

NIMH Types:  (1) One Year, Workmanship and Performance.

Li-Ion Types: (1) One Year, Workmanship and Performance.

PolyMax HPC Batteries: (24) Months for Capacity, (24) Months for Materials and Workmanship.


If any CriticalBattery fails to deliver at least 80% capacity during the Warranty period, it will be replaced at No Cost to You!

If any CriticalBattery fails due to workmanship during the Warranty Period, it will be replaced at No Cost to You!

We stand behind these new Products 100%.

Try One, You will never go back to over priced O.E.M packs or Ill fitting/performing aftermarket replacements.

Our New Chemistry, PolyMax HPC Cells, will out perform all of our previous offerings.


Dealer Pricing is Available.

Quantity Pricing is Available.

Many of our Premium Packs are also Available on Amazon, Just copy/paste the link on the page to your browser.

Public Safety PO's are welcome as is our Order Form. Just E-mail it back to us.

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