1. For input connect to the mains, for output connects to the devices you want to protect. The battery in the UPS will charge while the electricity is on. When the electricity is in failure, your computer (or printer, TV, DSTV, light, etc.) will be powered by UPS through batteries, the backup time is decided by the batteries you choose.
2, the sockets on the back of the uninterruptible power supply, not only can be directly connected with the device, but also can be connected to the power strip. So that you can expand your home’s connectivity. Although it supplies power to multiple devices, it can’t be overloaded, otherwise the product’s service life would be reduced.
3, After the battery is low, it should be charged in time to avoid damage to the battery due to excessive discharge.