When the UPS battery backup is powered on,120w uninterruptible power supply it will charge the litihium battery within the attached unit. When power fails the battery will keep the connected device powered for upto 24 hours.
Most modern electronic equipment in and around our homes rely solely on the utility power supply. When the power goes off, so does all our modern electronic equipment. It prevents the external battery from being over-discharged, keeping it from being damaged. Therefore,120W dc ups battery backup power supply it can ensure you have constant access control and security.
https://www.solarpowerinverter.net/