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NNTN4503 HT1550 FPP Red Battery Discontinued

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jpu535
Posts: 33
Joined: Tue Dec 16, 2003 8:27 am

NNTN4503 HT1550 FPP Red Battery Discontinued

Postby jpu535 » Tue Oct 31, 2017 11:26 am

I didn't want to resurrect a 5 year old thread so I figured I would start a new one.

I was looking to order some HT1550 FPP batteries and when I checked on MOL last month, early September, they were there. Well, I got distracted and didn't get a chance to order them. When I checked again yesterday they were gone. I called Motorola and was told they were discontinued at the end of September.

com501
Posts: 994
Joined: Fri Nov 02, 2001 4:00 pm
What radios do you own?: Over 50 - All Motorola

Re: NNTN4503 HT1550 FPP Red Battery Discontinued

Postby com501 » Tue Oct 31, 2017 6:57 pm

Great. Good thing I sold my 1550 last winter. Now we need the Chinese to build a replacement.

N4KVE
Posts: 1578
Joined: Wed Apr 02, 2003 10:35 am
What radios do you own?: XTS3000/5000, TRBO, 900MHZ

Re: NNTN4503 HT1550 FPP Red Battery Discontinued

Postby N4KVE » Tue Oct 31, 2017 7:51 pm

But I've seen radios for sale that act like the red battery is attatched, but isn't. Someone has figured a way to make the radios FPP with a normal battery. GARY.

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W3AXL
Posts: 89
Joined: Fri Sep 04, 2015 9:02 am
What radios do you own?: an unhealthy amount of them

Re: NNTN4503 HT1550 FPP Red Battery Discontinued

Postby W3AXL » Wed Nov 01, 2017 9:36 am

The red battery is simply a 1-wire dallas device with specific bits enabled to signify that it's a red battery. It's been a while since I did any research, but IIRC the standard 1250/1550 batteries also have this chip and it's just a matter of the programming that makes the difference.

The modifications that are available on eBay most likely just attach the 1-wire chip directly to the battery contacts inside the radio. As far as I know nobody has cracked the Waris series firmware to do the FPP mod in software only.

jry
Posts: 315
Joined: Fri Feb 06, 2004 3:14 pm

Re: NNTN4503 HT1550 FPP Red Battery Discontinued

Postby jry » Thu Nov 02, 2017 6:38 am

no the ebay mod is actually a firmware update to bypass the chip.
believe the person doing that is on the forum and you may find the responses with a search


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