I have purchased replacement batteries for Milwaukee tools from 3B before. The result was great. Charged very well, HELD charges and performed as wells any brand name battery. I then took a plunge and purchased 3 batteries for Ridgid tools. These were 2- 4ah and 1- 6ah. Visually, they were all identical. 1st red flag. As I compared them to existing Ridgid brand batteries they looked the part w the exception to the 6ah battery. At this point I'm thinking "what am I not seeing here". Charged them all, went well, a week later put them out to use on a job- in a flashlight. Flashlight kept going off as it does when a battery is low. Checked LED readout- Full. Removed battery and reinstalled. Once again, light in the flash light, then off again. 2nd red flag. I check a few tools like this. It is as though the batteries have a timing chip in them. I checked and rechecked the tabs on batteries and tools to see if connection was correct or short in some manner. Nothing stands out. A fair amount of time has passed. I bought them with something of a discount so the loss isn't horrendous but, annoying. As I revisit the whole event. I figure they, factory, sales and myself ALL screwed up. Me for not doing a righteous $#*!out to 3B, the sales people for pulling a bait and switch(put a 6ah sticker on an identical 4ah battery) and the factory for building a flawed battery. Now a couple of months have passed since purchase. I assigned two batteries to a specific tool and cased them and tool up. I just checked batteries and tool. Batteries still have a charge, and yep, still have a timeout glitch in them. Completely unreliable in the field. Well, truth be told, they do work. You just have to unload battery and reload every time they shut down. Piss poor. I'll gladly take the hit from Ridgid and buy a battery where all I have to do is wince from the $$$ cost, charge it, and use the tools. Makes my day SO much less stressed, and toss anxiety out the window where it belongs. I think my total loss for the experiment amounts to a tad under 100$. I received about 500$ worth of stress, confusion, anger and general malaise. Not the swinging bargain after all. I give it a two. Batteries actually hold a charge and charge well. It the USING the charge part that really hammers the coffin