Device continuously disconnects Fujitsu ScanSnap S1300i Mobile

Hello!

I’ve been using this scanner for few weeks already. For the months I’ve been using it there’s no problem with it. Few days ago, I noticed that the scanners continuously shows blinking light in its power button. We ignored it, we just thought it is just replenishing. We seldom use this scanner. Recently when I try to scan a document it turned off and on by itself. What could be the reason for this? Can you give us proper ways to resolve this problem?

Thank you!