You always hear that batteries should not be charged constantly. What is the situation with this device? I ask this question mainly because I only disconnect the device from the mains in warm temperatures and then listen to music outdoors with the battery and don't necessarily want to buy a purely mains-powered device. Teufel (Boomster) offers the option of switching the charging function on and off with a switch for these cases. But as far as I know, this is not available with Geneva, is it? Nevertheless, the question is whether the battery suffers extremely if I constantly charge it?