The battery has failed. Whether the battery can be reconditioned is not the question. The battery charger is condemning the battery when it does this. There are some battery fixes on you tube where a second battery can be used to get the dead battery off the zero voltage or low voltage limit that the charger is seeing. My response that the battery has failed is based on the charger symptoms and not on whether the battery can be reconditioned.
Testimonial: "Well you're incorrect because I jumped it with two 18 volt Dewalt and the thing is running like a champ so if the red lights on it might say the battery failed but it's charging it and it just keeps going like the Energizer Bunny so like I said if you guys need any information on how to bring back a dead battery go on YouTube and check it out it works just fine"
SOURCE: charger not charging
Just was on a website for Ryobi drills and it states that if the yellow and green light stay on for more than 15 minutes the battery is fried. Couldn't find the link but if you do a search for Ryobi Drill 18 volt you should find the same info. It was as product review from Australia I think.
I also have a problem with the charging of Ryobi batterys. They seem to charge AOK with the green light coming on but the charge does not last at all. Not sure if the problem is with the batteries on the charger.
SOURCE: My Casio Exilim EX-S880 wont turn on. Battery is
I found this while trying to solve my exact same problem.. It worked for me after about 7 times. Some other people on the site said it worked for them after 20 times. Good luck!
My NP 20 gave me the flashing red light of death and I got Casio to replace it. Then I had the same problem with my second NP 20 so I dug around for a way to fix it and I found the following advice on a site called FixYa. It worked instantly and I didn't risk ruining my battery.
ylu1 writes:
I had the same problem as this.
what i did was...
i kept putting the battery on the charger then took it off as soon as the red light came on.
i did this about 6 times.
doing this puts a bit of charge in the battery each time before the charger starts to flash.
after the battery as got enough charge in it it can start to charge.
hope this helps.
SOURCE: The Yellow and Green light both come on and stay
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.
SOURCE: Ryobi p111 charger -- light stays red
My charger do the same thing. I talked with the service people at Ryobi who said that the red led never goes out no matter how long you charge it. They suggested just charge it for 12 hours and then disconnect. Pretty dumb system, but that's apparently the way it is.
SOURCE: My battery will not charge. ( Ryobi 18.0v)
Bothights on indicates a problem with the battery. You cam try cleanibg the battery terminal with a Q-tip moistened with alcohol. Allow it to dry completly before tryin to recharge. If that doesn't work the battery may be defective or broken. If it was dropped that could cause the damage.
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