I received this battery case with a NOS? PRC-77 from a Japanese ebay seller. It is for 4 18650 batteries and apparently was made by 3D printing. Seems to work fine and has the resistance in the 3V line. Only problem is that the '25 and '77 are analog, with no low battery alarm so it is too easy to drain the batts below their 2.5V minimum and thus ruin them. It is identical in size to the BA-5598. And I do not want to sell it.

Clare. N2RJB

On Wed, Apr 22, 2026 at 7:50 PM Tim via MRCA <[email protected]> wrote:

Hi Dave ..My PRC-25 is powered by 2 “D” Cells in series (with a DIY 1 ohm resistor in series) for the 3 volt 2DF4 TX tube filament and two 6 volt, 4.5 A-H Gel Cells (Power Sonic PS640F-1) in series for the rest of the electronics. It all fits in the stock battery box and I can charge the Gel Cells by connecting pin leads to the Power connector female pins when the Z-1 plug is removed.

The 1 ohm resistor in the filament line is needed to drop some voltage (from fresh batteries) to the tube filament when it is cold-started. Mine is made from about 8 feet of 30 gauge magnet wire wound on a high value resistor as a form.With my occasional usage the D Cells last "forever".

Tim

N6CC

On Wed, Apr 22, 2026 at 3:37 PM KD2GIY via MRCA <[email protected]> wrote:

On my trip to MD and DE I came across a very good deal on a working prc-25 on the Jeep dock.

I understand the radio needs 2 different voltages and it would be a pain in the ass to fabricate this.

My question is, does anyone have for sale a drop in battery insert for this radio or can let me know where I can find one on the internet?

I've seen pictures of some that take d batteries.

I have looked and cannot find anything but used original dead batteries.

Thank you for your time.

Best regards
Dave
KD2GIY

______________________________________________________________
MRCA mailing list
Home: http://mailman.qth.net/mailman/listinfo/mrca
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
MRCA mailing list
Home: http://mailman.qth.net/mailman/listinfo/mrca
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html