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Motorola SL300 - need to wait after power down before will charge?

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g8tzl2004
Posts: 1092
Joined: Wed Sep 08, 2004 10:13 am

Motorola SL300 - need to wait after power down before will charge?

Postby g8tzl2004 » Mon Aug 06, 2018 8:40 am

I am charging my SL300's using a standard USB charger (5v 2A) but not an official Motorola charger....actual one used to charge a tablet PC so plenty of current.

The SL300's charge OK...BUT I have found that if I have been using the SL300's, if I power down and immediately connect the charger, I get a voice annoucement saying "unable to charge" or something similar. But if I wait a few minutes after powering down and then connect the charger it charges OK.

Anybody know what is going on? Maybe the battery voltage under load is too low and you need to let it recover after powering down...but then you would never be able to recharge a flat battery. Is there anything special with the official Motorola USB charger?

sjxts3000
Posts: 853
Joined: Sat Jul 09, 2011 8:14 pm
What radios do you own?: APX

Re: Motorola SL300 - need to wait after power down before will charge?

Postby sjxts3000 » Mon Aug 06, 2018 1:25 pm

How about you just use the dang charger that came with the radio? You spend several hundred dollars on each of your radio*s* (you said plural) and then use some other $10 charger to charge them?

VE3TUH
Posts: 256
Joined: Fri May 24, 2002 3:14 pm
What radios do you own?: more than I should...

Re: Motorola SL300 - need to wait after power down before will charge?

Postby VE3TUH » Sun Aug 12, 2018 6:55 am

Did you test with the proper charger to see if this behaviour is consistant or just related to your aftermarket charger? And no, you shouldnt have to power down to charge the battery. However, a friend of mine has an SL300 with similar charging issues.


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