Excerpt: Clipper is fantastic. Only reason it is 4 star and not 5 is because the scissors that came with it feel very budget, and don't cut that well. The clippers however were super sharp out the box, and the battery got through 4 boys haircuts right out the box before needing a recharge.
Summary: I purchased this model about 8 years ago (so no doubt it is several versions old). However I have used it for all of me and my sons hair cuts so it is used ever 2 months or so. I have never maintained the clippers in any way and they are going strong.
Summary: These are excellent clippers cutting hair easily and evenly. The only problem is that once the batteries reach the end of their life it's not possible to replace them, so the only option is to use them on mains power only or buy new clippers.