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80 posts

Master Geek


# 165876 23-Feb-2015 15:07
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I have  Motorola SX 709 two way radios which are about 6 years old but have lost the battery charger , the battery pack states it is  4.8V 700aMH Nickel-metal hydride but unable to find a charger for it as Jaycar says I need more information on it , I thought somebody on this forum may be able to help me source one as Im not sure about the electrical side of things

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3358 posts

Uber Geek


  # 1244930 23-Feb-2015 15:29
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They are just rechargable AAAs in series (4x 1.2v = 4.8) similar to unidens.

In theory a standard pack charger should do it as long as you keep an eye on the input rates.



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Master Geek


  # 1244960 23-Feb-2015 16:07
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Oblivian: They are just rechargable AAAs in series (4x 1.2v = 4.8) similar to unidens.

In theory a standard pack charger should do it as long as you keep an eye on the input rates.


How do you do that?

 
 
 
 


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  # 1244987 23-Feb-2015 16:32
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If you get a hobby charger that should do what you need. Just set it to a low current because of the small batteries, and put it on the + and - terminals of the pack. Little rare earth magnets are great for that.

Otherwise check on ebay or aliexpress for aftermarket pack chargers, there are heaps for various radios.




Richard rich.ms

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  # 1244994 23-Feb-2015 16:43
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^^

Or check under the battery panel for standard battery contacts (you may find they are present but the sealed pack just skips touching them), my unidens take the pack, or 4 individual AAAs. So you could get some eneloops and a standard charger if the need arose



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Master Geek


  # 1245004 23-Feb-2015 17:04
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It actually comes with a charger cradle so you can do the two radios  together

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  # 1245013 23-Feb-2015 17:17
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ok, well that makes it a little harder since you cant parallel or series up the 2 battery packs if they are at different charge levels and treat it as a single 8 cell pack.

Best bet is to put the model into ebay and see what you can get for $20ish in that case.




Richard rich.ms



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Master Geek


  # 1245015 23-Feb-2015 17:25
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Thanks, I'll try that on ebay first but thanks for the replies , I can always put separate batteries in it but didn't think it would be much of a problem getting a charger.... I was wrong

 
 
 
 


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  # 1245021 23-Feb-2015 17:53
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nicad and nimh are a pain to charge quickly and properly, thats why most things are going to lithium now where a simple charge control IC makes it charge quickly and safely.





Richard rich.ms



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Master Geek


  # 1245023 23-Feb-2015 17:55
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richms: nicad and nimh are a pain to charge quickly and properly, thats why most things are going to lithium now where a simple charge control IC makes it charge quickly and safely.


Interesting thanks

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Uber Geek


  # 1245101 23-Feb-2015 19:29
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Back the truck up.

Do you need a charger to do the cells, or do you HAVE the cradle, and NOT the power pack for the cradle?

Cause the way it reads, you DON'T have the cradles/pack

If that's the case, the required input will be on the base of it, and you get a power pack to match. And then the little image should point out the if centre pole is positive, and the size is how wide/long the hole it goes into is.



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Master Geek


  # 1245321 24-Feb-2015 07:07
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I do have the cradle but nothing relevant on the bottom



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Master Geek


  # 1245323 24-Feb-2015 07:08
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I meant to add  no power pack

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  # 1245329 24-Feb-2015 07:38
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What does the sticker say? It may take a standard power supply and do the battery charging itself, or the charging may be in the plug pack.



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  # 1245346 24-Feb-2015 07:52
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BDFL - Memuneh
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  # 1245347 24-Feb-2015 07:52
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I have a pair of Motorola radios and a cradle (different shape but similar sticker). The cradle sticker doesn't say anything but the power adapter to the wall outputs 9v 200mA - ( + )

Actually the sticker says KEBT-06 on mine.





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