I purchased this model from Revain in July 2012 and it has worked flawlessly in a variety of applications. I mainly use it to keep my lawn mower's battery charged all year round (this is the right way to keep the battery going for long periods of inactivity). I actually used it to start my previous car when the battery died. Most recently when I was having my 2015 Honda CRV serviced I was told that the battery was dead. When I got home I used the diagnostics (checked the alternator output, it was fine) and also found that the battery was 50% dead even though I had been driving without headlights during the day. I fully charged it and will continue to monitor the device. The device is a bit difficult to understand, but following the instructions it has served me well for over five years now. Some of the reviews I read complained that the default charger didn't match the setting I wanted. Again, this was not a problem, just read the instructions, remember that you have to install it every time. It has always been accurate for me, despite reading negative reviews about its accuracy. I used a separate voltmeter to check accuracy.
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