I have a ryobi charger 1423701. but it does not charge at all

Question moved to a Ryobi category from MISC.

If they both show charged, they are unlikely to be incorrect. You can test the contacts of the batteries with a test meter, and you can also test the charger output.

If they don't work in a tool, the tool may have failed. Having said that, they do appear to have some history of this. Check out the videos.

https://www.google.com/search?q=Ryobi+18+volt+charger+shows+fully+charged

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Yes, the green light flashes until the battery is fully charged on Ryobi chargers. This will change to a solid green light when the battery is fully charged until the charger goes to a power-saving mode. Not all of the Ryobi chargers have a power-saving mode. However, for those that do, the green led will dim over time and then brighten and dim slowly again in this mode.

My Ryobi charger, model P113, actually has a key for the LEDs on the unit on the left of the battery port. The manual for this charger is here: https://manuals.ttigroupna.com/system/files/5495/original/P113_192_trilingual.pdf?2011 . Ryobi has many of their manuals on their site. Look up your charger/tool here: https://www.ryobitools.com/power-tools/support/manuals , Home Depot's web site also has many of these manuals on the product site for the tools that they sell.

I hope this helps.

Cindy Wells

If the old charger has a deep-uncharge-protection contact and was also made for Li-ION ther is in any case a marketing technical design by a notch to protect the battery to place on the charger if this cells are not correct.
(this answer applies to all brands with a quality mark)

Two things come to mind (1) there is a short in the charger or (2) the light is simply out.

does the outlet work that the charger is plugged into... is the battery completely dead and the charger can't see it... is the charger even plugged in... or is it even any good ???

NO! Never charge lithium batteries in a charger designed for nickle based batteries like the NiHi your old charger was meant for. Ryobi did design the new Lithium charger to be backwards compatible so you can charge your older 18V NiHi batteries in the Lithium 18V charger.
Also note, NEVER miss-match the voltage, for example, make sure you are not trying to charge 12V batteries in an 18V charger unless the manufacturer has specifically stated that the charger is capable of multiple voltages.

http://oneworld1.inetu.net/manuals/ryobi/hp1442m_1802m_874_eng.pdf
It sounds like your battery is bad. If yellow and green are on for more than 15 minutes it probably a defective battery pack. See page 8 in the manual.

your batteries have possibly developed a memory and are probably shot or it may be the charger local toolstore should be able to test them both.Which ever one is bad it will cost more to buy a charger and battery than it will to buy a new drill .whatever you do ask the shop people how to stop the battery from developing a memory or if you want to come back to me when you have them fixed up I will be happy to tell you.please let us know how you get on ,thankyou

Does it not hold a charge, or will the charge not indicate "fast charge"? I had to apply a initial jump charge on the battery to get it up to 20 volts, then I put it in the Ryobi Charger, and it started charging it.