Huawei HW-Li2Ah User Manual page 3

3
Overview
3.1
Introduction
The backup battery unit is a lithium ion battery for indoor use only. It provides the
backup power solution for multiple ONTs and its input voltage is 11.1 VDC. The backup
battery unit works as follows:
When the mains supply is no
supplies power to an ONT.
When the mains supply fails due to force majeure, the battery immediately s
from the backup state to the working state, and supplies power to th
The following figure shows the appearance of the backup battery unit.
The backup battery unit consists of three components: battery (including the battery
monitoring cable), charger, and AC power cable.
rmal, the battery is in the backup state, and the charger
3
witches
e ONT.