Hi Bob,

I did not find a schematic to the device but I see no reason to remove batteries. In fact depending on how the circuit is set up the batteries could very well act as a buffer that would have some ability to help protect against voltage spikes from the 5 v external circuit.

I think video track told me he is a electronic design engineer. He may be able to comment on the issue.

I have never seen a consumer electronic device that needed to have the batteries removed to plug into a external power supply.

Don't worry, be happy!

Look on page 44 of the users manual. It talks about the auto power off function. It says that the auto power off function is disabled when plugged into USB power which also leads me to believe that the MFG expects the batteries to always be in the device. The auto power off function is there to save the battery power.

Billy

Last edited by Planobilly; 10/04/20 06:12 PM.
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