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I have a set of sylvania 2 way radios which came with rechargable AAA batteries(Peaceboy 550 mah, 1.2v Nimh). These batteries no longer charge, so I purchased AAA rechargable Nimh batteries to replace them, but they don't work, and I'm not sure why.

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6 Suggested Answers

vrc_tech
  • 109 Answers

SOURCE: Batteries won't charge on new cobra 2VP 270 radios

If radios are brand new then I would take them back to the store for warranty exchange. The other opton is to vist a local radio service center and ask the tech to jump the battery. if the battery falls below a certain voltage it might need a quick jump sart from a power supply with a higher voltage normally 12 volts works well...

Posted on Aug 20, 2008

  • 157 Answers

SOURCE: Midland rechargeable battery packs won't recharge and vibrate

Hello batterbum, from the info you listed you have the right battiers & charger, with alkaline the radios work leads to wrong or a bad batch of Ni-MH battiers. Vibrations from a battery pack states too much current being drawn for battery capacity. Note: depleting a battery and recharging with a charger will place the battery in a false full charge state. Recharging a depleted battery with a DC power supply with current limit can reboot the battery to a 90% cycle. I suggest returning battiers for correct replacements, if they are correct 'by the book' ask for the highest in mAhr specs. Please inform me of your outcome. Good Luck

Posted on Nov 07, 2008

BillB-SA
  • 2761 Answers

SOURCE: I took out the rechargeable batteries (replaced

Press the channel/scan up or down arrow key to change3 the channel on either radio. Need the operating instructions? You can download/print them here:

http://www.banoggle.com/Products/Uniden/manuals/GMR-325-2om.pdf

Bill B

Posted on Aug 06, 2010

  • 1 Answer

SOURCE: How to charge battery in Motorola Talkabout Distance DPS

also got to battery barn.com and they have matching rechargable batteries with stand alone battert chargers that can be used AC or off the car 12vdc port. I have the same radios.

Posted on Aug 08, 2010

walesarumi
  • 6993 Answers

SOURCE: I have a Yaesu FT-51R purchased in mid-year 1995.

Hello,

Yes, it is possible to use the FNB38 NiMH batteries or any other battery as long as it is the same size and the same volt. Once the battery can fit into the radio and charger and has the same volt, then it is definitely going to work.

I hope the above is clear and understandable, if not, please let me know.

Good luck.

Posted on Apr 25, 2011

Ironfist109
  • 3018 Answers

SOURCE: cobra pr 3850wx bought new NiMh 800mAh 1.2v

  • A Cobra 3850wx Radio requires 4x600mAh NiMH 1.2V AAA Part # GA-3ANH rechargeable batteries.
  • Not just any AAA rechargeable battery will charge in the unit.
  • All will work in the radio but not all will charge inside the radio. It has to be a specific battery.
  • This is an example of what you need. GA-3ANH batteries which will charge inside your radio. http://www.tomsawyer2wayradios.com/catalog/item/3823249/5076887.htm
Regards, Tony

Posted on May 23, 2011

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Where can I get a new set of rechargable batteries for my cobra microtalk cxt275


The Cobra CXT275 radios can operate on any type of battery (Alkaline, Ni-Cad, NiHM). Each radio uses 4 AAA batteries. Only special rechargeable batteries can be recharged in the actual radio (see below)
If I remember correctly, they come from the factory with NiHM batteries rated at 300mAH. "mAH" stands for milli-Amphere-Hour and it represents the storage capacity of the battery. (The larger the mAH, the longer run time of the battery)

You have 2 options: A or B
Option A) Buy a set of Nickel-Metal Hydride AAA rechargeable batteries and a external battery charger. When the batteries die, pop them out of the radio, and charge them in the external charger. When they are recharged, pop them back in the radio.
Option B) If you want the ability to charge the batteries in the radio, using the "drop-in charger" then you will need modify the batteries so they can charge in the radio.
Follow these steps: You must be somewhat electrically inclined to do this...Note: By doing this you are going to void the warranty of the radio and new batteries that you just purchased.
1) Buy a set of Nickel-Metal Hydride AAA rechargeable batteries. You can probably find some rated at 600 mAH (this will extend the run time)
2) Looking at the back of the radio with the cover removed, there are 4 slots for batteries.
3) Looking at the battery slot on the far right, you should notice 2 contacts for the negative contact. The one on the bottom, is the contact for the radio to receive power from the battery. The one on the side (about 1/8" inch up from the bottom contact), is the contact for the charger to recharge the battery.
4) You will need to modify 1 battery for each radio. Somehow you need to bridge the bottom contact with the side recharge contact.
5) (look at the negative end of the cobra factory batteries and this should help you realize what you need to do) depending on the manufacturer of the new rechargeable batteries, you may be able to use an X-acto knife and remove 1/4" of the plastic wrapper from the bottom of the battery on the negative end. This should reveal the metal shell of the battery that can mate with the radio's side recharge contact.
If it does not, you need to find another way to have it mate with the bottom contact. You might be able to use some Aluminium Foil to bridge the bottom contact with the side recharge contact. Be sure the Aluminium Foil does not touch the positive contact of the battery to the left! You could have an electrical short!
6) Insert the Modified Battery into the right slot.
7) Insert the other 3 new batteries into the other slots. These do not have to be modified. Only the right most battery needs to be modified.
8) Drop the radio in the charger for the batteries to charge. The red LED on the charge base should come on. If it does not, then the side recharge contact is not making a good connection with the negative battery terminal.
9) If the red LED comes on, then the modification works. Let the batteries charge for 24 hours for their first initial charge.
10) When the batteries die after radio use, then charge them for about 12 - 16 hours in the drop-in charger. Do not let the radios sit in the charger for long periods of time. That can destroy the batteries. Take the radios out of the charger when the allotted time has passed.
11) If you hardly ever use your radios you will want to drop them in the charger for about 8 hours every 3 months. This will keep the batteries fresh without damaging them.
I hope this helps, Thomas (Electrical Engineer)

Feb 22, 2012 | Cobra Two-Way Radios

1 Answer

Cant use my fv700 i changed the chanell and frequency for bothh but still not working help


One solution that i read was "i had two fv700 do the same thing. i replaced the nimh battery packs in both radios and replaced with triple a batteries and both started working properly"

This has worked for me also - aaa batteries fit right in - it's just a drag that it's not rechargeable anymore - I wonder if 3 rechargeable aaa's would work?

Hope this works!

Jul 28, 2011 | Two-Way Radios

2 Answers

Cobra pr 3850wx bought new NiMh 800mAh 1.2v rechargable batteries now the base charger lights won't come on when i put the radios in it


  • A Cobra 3850wx Radio requires 4x600mAh NiMH 1.2V AAA Part # GA-3ANH rechargeable batteries.
  • Not just any AAA rechargeable battery will charge in the unit.
  • All will work in the radio but not all will charge inside the radio. It has to be a specific battery.
  • This is an example of what you need. GA-3ANH batteries which will charge inside your radio. http://www.tomsawyer2wayradios.com/catalog/item/3823249/5076887.htm
Regards, Tony

May 22, 2011 | Cobra Microtalk 100 FRS Walkie Talkie...

1 Answer

How could i change its batteries?


  • Your radio, Midland LXT110, utilizes a NiMH rechargeable battery pack or 3AAA batteries. I have a similar set and when the battery pack runs out I just use regular AAA rechargeable batteries. They are more economical. To change the batteries in general follow these steps.
  1. Remove the back clip.
  2. Now remove the battery cover by pushing down from the top center of the battery cover and slide it off.
  3. Replace batteries observing polarity.
  4. Replace the battery cover.
  5. Replace battery clip.

Regards, Tony

May 17, 2011 | Midland LXT110 Two Way Radio

2 Answers

It came with battery i assume are rechargable but when plugged in there is no sign that they are charging and when you take them off the charger they die in a few seconds


It looks like some of these came with alkaline battery backs, some with rechargeables, and some with no batteries. The rechargeable packs will be marked "NiMH" with the part number FA-BD on them. If yours are the rechargeable types they probably need to be replaced. You can also power the units with 4 AAA alkaline batteries.

Bill B

Feb 25, 2010 | Cobra MicroTalk FRS 110-2 (14 Channels)...

3 Answers

Motorola talkabout t5700


No, the charger is only usable to charge the rechargeable NiMH or Li-Ion battery which comes with the radio. Attempting to charge Alkaline rechargeable batteries with this charger could cause the to expode. If your charger is not charging the batteries which came with the units, it could be you do not have the charger cord end plugged in all the way, or the batteries dropped below the initial charge level by setting on a store shelf too long. Most TalkAbouts come with a cradle style charger to hold the radio, and a possible plug to plug into the charge hole. Check all connections, and clean any battery/charger contacts with a pencil eraser. To re-initialize the batteries you would need to attempt 3-5 charge cycles by charging for 8-10 hours, then letting the battery rest for 8-10 hours, repeating 3-5 times as needed. If this does not bring the battery back to life, you need to replace the batteries.

Jun 07, 2009 | Motorola Talkabout T5700 AA (22 Channels)...

2 Answers

Motorola t5000


I'm assuming you're using the NiCd batteries. NiCd batteries do not last forever and need to be replaced when they show a resistance to beign charged. To optimize the life of these batteries you need to let them fully discharge before attempting to charge them. This is impractical most of the time.

You have two choices:
1. Purchase a NiMH charger and AA batteries and use that INSTEAD of the CHARGER STAND and NiCd batteries. This type of battery can be recharged without the problems discussed earlier and will last longer... or
2. Purchase another NiCd battery pack.

Oct 24, 2008 | Motorola T5000 Two Pack 2-Way Radios with...

1 Answer

Short Battery Charge


Hello Dave2794875,

According to manufacturer specifications the NiMH rechargeable batteries should provide about 12 hours of operating time assuming a 90/5/5 operating cycle (90% standby, 5% receive, and 5% transmit). Theoretically, decreasing the volume can help somewhat but should have a minimal effect.

If you are only seeing two hours of standby time then you are definitely not getting the specified amount of time. This could be indicative of a problem with the charger or the battery pack or both.

Using disposable alkaline AAA batteries, you should see an increase in operating time because alkaline batteries have more capacity and last longer then rechargeable batteries. However, if yu do a lot of operating the cost of disposable AAAs can add up fast. For most users the rechargeable batteries are much less expensive in the long run. If you only use the radio occasionally then alkaline batteries are the way to go.

Hope this helps,
Ken
"Go Ahead. Use Us."

Jul 26, 2008 | Uniden GMR-1558 / 2CK 2-Way Radio

2 Answers

Rechargeable batteries


They are a plastic wrap of 5 aaa batteries.......if you can't find the direct replacement for those batteries, you can just make up a battery pack yourself.
The main thing when doing this is to use the same TYPE of battery. For example alot of these battery packs use NiMH or NiCD batteries. The charger that came with the radios is designed to charge this type of battery. So look at the battery pack and if it says they are NiMH bateries... pick up 5 AAA NiMH batteries... connect them in series and your set.

All you really have to do is get the same type of battery that is close to the same voltage.
So if your stuck.... just make up a battery pack.
If you had a charger for Lithium Ion batteries, I would say make the battery pack out of those type insted. They are 1.5 volts insted of the lower voltage of NiMH and other rechargeables.
The slight increase in voltage will increase the output wattage of the radio.
But again, Lithium Ions use a different type charger than NiMH.... so if you want to use the same charger.... use the same type of batteries.
Take care

Dec 01, 2007 | Two-Way Radios

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