I bought the Gigaset ZX600 also here in Amazon and must say that it has also very disappointed me in terms of durability of the Accu's. I have the power 10 hours ear (standby) on the phone from time to time on the day it (even have ever tried the advertised you 4 hours talk time durability, worked) ... OK ... that it's even there .. .but the Accu goes after 6-8 months permanently broken and can not be replaced, that is for this price really hahne Büchen ...: 0 (( Since I had to have a replacement immediately, I bought the 2nd ZX600 at my local electronics retailer. The 2nd unit stopped even the oa few months and I've complained about it until now 3x at my local dealer and get a new one. Now I claim it just for the 4th time and my dealer now has "the Papp on", because this device and said to me, I could this earpiece not "use profssionell". As I once watched narrowly, because where I call "professional" if I have the button in the ear (on standby) and now and then a day leads a telephone conversation ??? I feel completely ripped off, because should not the button in the ear during the day on standby may be worn, this should be stated in advance on the package !!! I do yes no button ear only when the phone rings. Then happened what the previous speakers have already criticized. Now I'm going to buy another, kompatibeleres device to my Gigaset. At least I'll try to find something ... Adequate and Gigaset gets an A thick complaint mail sent ...: 0 (( That reminds me also falls directly the documentary the Verbraucherzentrale NRW, where our customer was informed that the electric industry especially an "early-Broken-go-part" installs, so you have to quickly buy a new one again. But I do not see ...