I have a Braun Cooltec shaver I got several years ago from a vendor in the US. The Cooltec feature is nice but it drains the battery fairly quickly (so I recharge it often). I also have a Braun cartridge I bought from a guy on eBay soon after getting the shaver, and it looks almost identical to the cartridge I got with the shaver. The long trimmer cutter on it seems to be dull and pulls. I swapped back in the cartridge that came with the shaver (I sterilized it of course), and it seems to trim alot better- no pulling and it's a decent shaver. So, I am wondering, what are the odds the cartridge I bought off eBay is a counterfeit? It looks identical in all ways except the long trimmer has some slight differences in the shape of the guard.