Hello there, the evaluation with the stars irritated in this case actually something because the device is very handy and great giving good service. The problem is the battery, which relatively quickly gives up the ghost. Have inquired directly from Bosch and learn there that this case, intense work, no longer than 10 to 15 Min.hält. What can one do well, just play stuff, or the two alternatives be used, every 50 min. Charging pause or a second battery. The is actually offered in a variant, but with the same markup as if you buy it individually. I think that's not good, but it should be to have at least half. The real problem, however, is that one never learns anything about the durability of the battery, however, plenty of safety information, which no one, other than the manufacturer interested. If I had seen how long the battery lasts only, I would not have purchased the product, but also no current device because it should be a battery yes, but it also has something. Now the device was already in use, so it will be difficult with a possible return. mfG Thomas Leyh
