Small compact and good capacity. Unfortunately, I found random failures of the battery. The player can run several times without problem, and one morning, the battery is empty while I recharged at night. Technical support does not know this fault, so, for them, this failure does not exist! They do not even imagine that the battery bp is probably a symptom of intermittent failure of a component ... In case the USB, the USB cable, or my way to recharge the machine; in this case, why would work some times and not next time?