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I have bought 3 of these over the last 5 years. They work great once I got used to how they work. They arent perfect but the best for the price. The battery does start running down after about 6 months. I havent had 1 not charge tho. My first one I have to charge every day. I do use them everyday. I keep series on 2 and the third I change out books. It was cheaper and easier to just buy a new one. I can listen and charge at the same time so thats nice too. I never travel without one. I may have to buy another one for a spare so I dont have to get used to a different one, as I hear they arent making them anymore.
Love this player. This is my second one ... the first one I inadvertently deleted the 'Tools' from menu, so just replaced with new -- price is very reasonable. I use it for audio lectures, New Age music and guided meditations mostly. It's small, easy to take anywhere ... walking or just for relaxing. Well worth the price.
Gave this to my son for Christmas as his first iPod-type gift. Within a few weeks, many of the mp3s were corrupted and I couldn't even delete the files back off the Ruizu or download new ones due to the way they corrupted. I emailed the company for help as suggested in the manual, and never got a response. As of today, it will no longer charge.