Hello,

I need advice.

I bought 3 pcs C310(EU) Ver:2.20 P/N:1770500148

In one place of the installation, there will be a problem with the power supply using the adapter, as there is no 220V connection.

I tested the power supply from the 12V 7Ah battery, which is used for backup sources. The camera worked without any problems at first, but after some time it started making an intermittent beeping sound. 

After connecting to the adapter, it works again without problems.

What could be the problem or how to ideally provide power from a battery source.

Thank you for your response

Richard