Bluetooth AR3011 not work well with only battery

[xin344]

Hi there, there's a problem I found bluetooth devices such as keyboard not work well when I use BATTERY, I have no idea, do every one have any idea? Or dealing with this?

Thank you for your reading, and please give me a way to show this problem out.

 

[xin344]

I think it difficult to solve, can anyone give any idea?