Make sure to get the slim version to use with Sennheiser mics. Regular size are a tight fit, may get stuck on a bad day. I've been using Ansmann for about 18 months; had a couple show up as bad on the charger (and taken out of rotation) but no failures in use. I can get great run time with them, 6+ hours in a handheld. I'm sold, will keep using them.
Mike
Mike