Question about Sony MDR-RF970RK Headphones

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The operating instructions say that after 16 hours the red power/charge indicator light would go out, indicating the batteries are fully charged. After 3 days the red light on my unit is still on. The green light comes on when you remove the headphones from the cradle and the headphones work, but the red light comes back on and stays on when in the cradle. Is this ok, or does this mean the batteries are weak and can never fully charge?

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I have the MDR-RF970R but I bet the battery is the same. If you have had the headphone for seceral years then I bet you are right, the battery is going. You might try using them till the battery dies and then recharge. This is called deep cycle and may time it will extend the life of rechargables.

If the headphones are new, then just check and make sure that they going all the way into the charge slot.

I will say it is not common for me to see the light off, but I use the headphones all the time.

Good luck.

Posted on Sep 20, 2010

  • Emily Baugh Oct 02, 2012

    Headphones don't work at all. Is battery in the base or the headphones themselves?

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Posted on Jan 02, 2017

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18v 12 cordless trimmer/edger. Why won't it start?


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CHARGING THE BATTERY PACK
Battery packs for this tool are shipped in a low charge condition
to prevent possible problems. Therefore, you should
charge them until the green LED on the front of the charger
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NOTE: Batteries will not reach full charge the first time they
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CHARGING A COOL BATTERY PACK
See Figure 3.
If battery pack is within normal temperature range, the red
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NOTE: If the charger does not charge the battery pack
under normal circumstances, return both the battery pack and
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electrical check.
n Charge the battery pack only with the charger provided.
n Make sure the power supply is normal household
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n Connect the charger to the power supply.
n Place the battery pack in the charger aligning raised rib
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n Press down on the battery pack to be sure contacts on
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NOTE: The green LED will remain on until the
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n If both yellow and green LEDs come on, this indicates
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Allow the battery pack to remain in the charger for 15
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n After normal usage, a minimum of 1 hour of charging time
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n The battery pack will become slightly warm to the
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n Do not place the charger and battery pack in an area of
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Source(s):http://toolboyworld.com/eBay/Ryobi_P110/...

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1 Answer

The operating instructions say that after 16 hours the red power/charge indicator light would go out, indicating the batteries are fully charged. After 3 days the red light on my unit is still on. The...


If it is new, send it back, but make sure you carefully read the instructions first. If is says the indicator light is red on charging and green when fully charged and it doesn't do that then the batteries or the charger are defective.

In future make and model are useful. And you posted to electric drills, but I recategorised it.

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Completely wrong. Quoting from the user's manual:

"The charge indicator light (LED), located on the charg- ing stand, will light up red and glow when the char- ger is properly connected to power supply. This light indicates the charger is operating properly. It will remain on until battery pack is removed from charging stand or charger is disconnected from power supply.

After normal usage, 3 hours or less of charging time is required to fully recharge battery pack.

If both red and orange LED indicators glow, the battery pack is deeply or completely discharged, and 6 hours or longer of charging time is required to fully recharge battery pack.

Note: If charger does not charge battery pack or orange LED continues to glow after more than 30 minutes of charging, return battery pack and charging assembly to your nearest Ryobi Authorized Service Center for electrical check."

So to summarize: red = charging. orange (yellow) = fully discharged battery. orange after 30 minutes - bad battery or bad charger.

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