Now, after a few weeks use, can be pulled on my part the following conclusion: The battery is thoroughly recommended ansich. Do what he will, invites well, and laässt to handle well. The LED lamp is to use relatively bright and well. Only the supplied USB cable is bad, because it now no longer suitable for loading and unloading. Probably the connector is defective - Loose connection. Therefore deliver a star. With the USB cable from the smartphone charger it works perfectly.
Since you always have a suitable USB cable rumzuliegen Normally, I do not find it particularly bad. But you Solltre change anyway.