Last year, rather than invest a hundred bucks for a single Ridgid lithium battery and more for the "proper" charger, I purchased a flashlight/drill combo with two lithium batteries and charger from Ryobi. Price was low and I was curious if the performance would live up to the hype. I'm into flashlights as a hobby and I use several different sizes of rechargeable lithium ion batteries which perform well and save a lot of money over single use. I can charge these batteries when they are only partly drained or to the point they shut down without a problem. I mentioned this because with the 18volt Ryobi lithium ion battery, it seem if I try to charge a battery that is not drained much the charger malfunctions. The lights flash and indicate a "defective" battery, but if I drain the battery completely it will charge fully with not problem. I have had problems when trying to use these same batteries if they have been stored in a very cold environment. Now I have mixed thoughts regarding the pros and cons of what should be a superior battery technology compared to nicads. My Ridgid nicads are amazing! Been going strong for several years now.
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