First of all I'll explain my situation: I own a Bluetooth speaker, more precisely this one: http://www.leicke.eu/en/products/EP18108
Due to my clumsy hands it fell while the USB cable was connected to the charging socket, and the USB socket split from the speaker's board. All features of the speakers work great, but I cannot charge it without the socket.
One solution might be to solder the socket back to the mainframe, but it doesn't seem a good idea with my standard soldering iron.
However, I can access to the battery which shows the black and red cable.
I'm not sure if I could charge the battery by connecting directly to a 5V source, or maybe that is not that simple and could damage the rest of the mainboard. Maybe I should take the battery out every time I would need to charge it... maybe you guys knows a better way to connect a charging circuit to this cables and perform a new charging socket in the speakers box.
Could you please give me a hand on this?