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I have micro talk cobra two radio. It have desktop charger but we lost its power supply. We need to have power supply but we do not know the dc voltage specification. Can you tell us the dc voltage specification of this power supply? Thank you very much.
If the desktop charger is the version that can accommodate two radios simultaneously similar to the T5000, then the AC wall adapter or the power supply is 9 volts AC.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
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Most lithium small radio batteries are 3.6 volts. If AA or AAA batteries, multiply by 1.5 volts. 4 batteries = 1.5 * 4 = 6 volts MAXIMUM. Rechargeable batteries are 1.2 volts. Your charger would be a much higher voltage because it takes power to "push" the charge into a battery. You didn't say, so I am assuming you want to operate the radio with a wall charger. I've done this by soldering the wires to the battery contacts. You need a higher voltage than 3.6 volts, but milliamps is more important. You need enough milli amps to get the radio to transmit. Too much and it frys, literally. So, this is all on you to decide if the risk is worth it. I use a 5-6 volt power supply set on no more than 1 amp (800 ma is my favorite size) 1 amp = 1000 ma. Let us know if this helped!
Check your battery contacts to see if they have a film of dirt or debris. If so, clean them with a pencil eraser. Check to see they are making good alignment with the contacts in the charger. If these suggestions do not solve your issue, you may have a bad solder on a battery contact in the radio. (Be certain the radio is shut off when charging.)
The fact that these turn on while on the charger is an indicator that the batteries are just that far gone. Depending on how much you like these radios vrs the cost of a new set is something to think about.
This link is where you can get a reliable battery replacement.
I use a newer Midland talk around for camping, hiking etc. The thing I always look for in a talk around radio is if the manufacturer battery goes bad or runs dry can I use some batteries at home with it? I like the fact I can put 4AA batteries of the shelf in my radio in an emergency. And when the stock battery gores kaput, I can use some AA rechargeable batteries I already have at home and save on replacing the battery or radio. Something to think about should you decide to get a different radio set.
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