I've had this for about a year and I noticed that the lights are not accurate anymore. The first spot always shows green even when I switch the batteries around. Then I took 4 batteries that I know are charged and tried again. It still showed the same set of colored lights. The first is green and the rest are red. I was going to give it two stars but I realized I've had this for just under a year. It's been working fine up until recently so maybe a year is its shelf life.Edit: After writing this review, a customer service rep emailed me and asked if I would like a new one. I said yes and the new one seems to be working fine. However, the new one now charges with a usb port instead of directly in the wall. It's not a big deal since I have a bunch of wall to usb chargers. The old one lasted a year so I'll see how long this new one lasts. Either way, I'm bumping them up a star because of the great customer service.Update: It has been almost a year since I got the replacement and it's still working great. Bumped it up to 5 stars.
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