Hello DeltaDedicated,
Thank you for your inquiry! We recommend to keep the battery pack plugged in while the A/C Adapter is in use, as a back up. If you do not want to have the battery pack plugged in at all while using the AC Adapter, simply remove the top 'lid' off of the battery pack to remove entirely.
Best regards,
Tanya
Answered by: Delta Faucet
Date published: 2019-05-08