Revised. Two days after leaving the review below I was contacted by customer support proactively. They asked if they were to send me out a second unit for free, and if it worked properly, would I change my review. I thought this only fair. I received the replacement unit without having to send back the defective unit. I was definitely impressed by their customer service. I took two sets of completely dead aa batteries, which was verified by battery charger. I placed eight in each unit. As before the first unit never finished charging the batteries. Well, I did stop it after 36 hours. I tested those batteries and they did have about a 10 percent charge. I replaced four of the batteries back into the defective unit and it DID charge them after 12 hoursOkay so now for the new unit. I am happy to say the new unit charged all eight batteries in 10 hours. So it does work. I did however try only four batteries in the new unit and it took only 6 hours to charge. Simple math would show that it is faster to do all eight at one time. But if you need for batteries quickly charge only what you need.I have changed my rating to 5 stars, 80 percent because the product worked as advertised but 20 percent because of the excellent customer service.I finally wanted to state that I did NOT receive this product at a discount.---------I purchased this battery charger because of its ability to charge 8 batteries at one time. However after using it I realized it cannot charge eight batteries in any reasonable time. Batteries were in the charger for 36 hours without completing a charge. Putting the to battery tester it showed it was only 11% charged. I the. Tried four other batteries that were as dead as the first eight were and it took only six hours to charge completely. So there is no reason to spend the extra money for eight slots if you can only use four at a time. I would not recommend this product to anyone
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