Question about Ryobi Multi-Volt Battery Charger

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I get a green and yellow light on the Ryobi 18v charger and the batteries don't recharge. Does this mean the charger is now bad? Thanks for any help. Dan

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This usually indicates that one or more of the rechargeable C batteries is not recharging. The batteries are standard rechargeable C batteries but the terminals are spot welded and are very hard to separate. There are 15 rechargeable C batteries in the Ryobi 18v battery pack. A battery tester will show which battery(s) needs replacing. There are refurbishing centers (Google search) but they will replace all the batteries and usually upgrade the OEM 1500 mah batteries with 2100 mah, or higher, batteries.

Posted on Jul 17, 2010

  • jeriatric May 03, 2014

    The C batteries are compact 'Sub C' batteries and not the standard C batteries you find in the hardware store...but are easily found with a google search The milliamp ratings must match. The milliamps (mah) can range from .1200 mah to 3500 mah. The type of battery should not be mixed; ie Nicad, Metal hydrided, Lithium. You can 'flash' the battery pack (a 12 volt car battery will do) by momentarily tuching the positive and negative contacts on the battery pack. This will 'flash' away the tendrites that are shorting out the weak Sub-C battery. This is only a temporary solution (not to be used with Lithium batteries).to give you a little more life to a dying battery.

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Hi, it is more likely your batteries are worn out, they don't last as long as the drill

Posted on Jul 07, 2010

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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.

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http://oneworld1.inetu.net/manuals/ryobi/hp1442m_1802m_874_eng.pdf
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