Are there batteries in my Loop kit?

Let us take a look at both of your devices....

The Loop Hub

This doesn’t have an internal battery and just requires a plug-in power supply, which is supplied in your Loop kit.

The Loop Clip

This is powered by a non-replaceable battery designed to last the life of the device, depending on usage conditions.  

Leaving the Clip unattached or loosely attached to a power cable can diminish the battery life considerably as in normal operation the Clip scavenges power from the electricity cable rather than use its battery.