Motorola Talkabout two way radio

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PeterQ

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#165876 23-Feb-2015 15:07

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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#1244930 23-Feb-2015 15:29

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.

PeterQ

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Master Geek

#1244960 23-Feb-2015 16:07

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?

richms

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#1244987 23-Feb-2015 16:32

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

Oblivian

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#1244994 23-Feb-2015 16:43

^^

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

PeterQ

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#1245004 23-Feb-2015 17:04

It actually comes with a charger cradle so you can do the two radios together

richms

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#1245013 23-Feb-2015 17:17

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

PeterQ

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#1245015 23-Feb-2015 17:25

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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richms

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#1245021 23-Feb-2015 17:53

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

PeterQ

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#1245023 23-Feb-2015 17:55

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

Oblivian

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#1245101 23-Feb-2015 19:29

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.

PeterQ

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#1245321 24-Feb-2015 07:07

I do have the cradle but nothing relevant on the bottom

PeterQ

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#1245323 24-Feb-2015 07:08

I meant to add no power pack

timmmay

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#1245329 24-Feb-2015 07:38

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.

PeterQ

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#1245346 24-Feb-2015 07:52

freitasm

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#1245347 24-Feb-2015 07:52

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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