By contrast, the firm built-in battery is simple scrap. At least for me.
On the one hand he invites indefinitely, which is signaled by a red, LED display. Charging time is about 4, sometimes 5 hours which is then indicated by a green LED.
After 24 hours, the battery - without any use! - Empty again.
I durchexerziert the now 3 times.
Charging - short function test - playing - after 24 nothing.
With a 5 Euro-pointer I leave I liked that, because you can not expect more. But in a region about 30 euros price that is a no go.