Question about Motorola Mobility H300 Wireless Headset

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No Power My H300 worked fine for several weeks (7-8). When I thought the battery was dead, I replaced it but the headset will not power on again. Did I do something wrong? ...Yes, I have made sure the battery is in the right way.

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Radio interference from a nearby bluetooth-capable device that's paired is the culprit. Pair your bluetooth and your phone in the basement of your home, if your home does not have metallic walls and doors..

Posted on May 01, 2008


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Posted on Jan 02, 2017


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1 Answer

CS55 headset battery was dead (app 1 1/2 years of service). I replaced it and fully charged. Worked fine for 3 or 4 days. Now, won't charge. Tried the system reset and power cycle, no...

On your base there are the numbers 1-4. Put the # 1 in the 3 O'Clock position like a clock. Try putting the letters that are in the bottom on B.

Good luck from Headsets Direct - 800-914-7996.

Aug 10, 2011 | Plantronics CS55 Wireless Headset

1 Answer

Can you set the H300 to pairing mode

startingwith the power off push and hold the call button while the head set turns on....then continue holding the call button until the light turns blue that has enabled the pairing mode now the pin code for all h300 model bluetooth device is 0000..i hope this helps

Feb 01, 2011 | Motorola Mobility H300 Wireless Headset

1 Answer

I can hear great on my end of the cellphone but people on the other end can barely hear me....what can you suggest as a fix....thank you for your


Due to some reason this may happen:

Battery might be weak or in a state of dead stone or loose contact.

1)Open the battery door at the back of the
2)Insert a new battery so that the + and -
markings match the markings in the
battery compartment.
3)Close the battery door

If this is working fine before and now you have this problem the microphone soldering might be loosened out.You have to re-hot it.

If you have warranty,You could take it to the service center,If you have warranty you can ask him to replace the one.

post a comment for further assistance.

thank you for using fixya have a nice day:-)

Aug 26, 2010 | Motorola Mobility H300 Wireless Headset

1 Answer

No power

I think you should check the charging system. You said you replaced the battery a few weeks ago. Even with the charging system not working, the battery might have enough power for a dozen or more start-ups; but using the lights may have drained what power was left. Get or borrow a battery charger and charge your battery. If mower then seems to be working fine, measure the voltage across the battery when the mower engine is running at normal speed (not idling). It should be 13.5 volts or more if the charging system is working. 12 volts or less means it's probably not working. Either test or replace the regulator/rectifier. Please rate me if you think this helped, thanks!

May 31, 2010 | Craftsman 26 Hp 54" Deck Yard Tractor

1 Answer

Why wont my bluetooth h300 turn oni changed the battery because i thought that was the problem but noe its like theres no power it just wont turn on no blinking lights or anything

Did you hold the call button down for more than a few seconds?

Check the manual out to make sure your doing the correct process.


Jul 16, 2009 | Motorola Mobility H300 Wireless Headset

2 Answers

No Sound/No Power

I used your site to research the problem further. I found an answer which recommended rubbing the suspect terminal lightly with a pencil eraser. It worked! I now have battery power and my headset works fine.

Nov 30, 2008 | Bose QuietComfort 2 Consumer Headphones

1 Answer

Headset problems

Hold down the power button untill the light remains on.
This setts the device to "Find Me".

Jul 21, 2008 | Motorola Mobility H300 Wireless Headset

1 Answer

Motorola H300 problem

it may be defective. thats the best advice i can give. try calling customer service and see if you can get a replacement...

Nov 07, 2007 | Motorola Mobility H300 Wireless Headset

1 Answer

Completely dead - Worked great for approx one week, now will not power up at all.

yes they really do not like being on the charger permenantly because it burns the cells out in the battery which is what I would say has happened here.
Maybe if you leave it sit for a week then plug the charger back in and see if it powers up you might be lucky

Oct 30, 2007 | Motorola Mobility HS850 Consumer Headset

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