Which of the following descriptions of Huawei’s DC power supply are wrong?

Which of the following descriptions of Huawei’s DC power supply are wrong?
A . When the mains power is normal, the rectifier module not only supplies power to the load, but also provides floating charge current for the battery.
B . When the mains power is off, the battery will power the device.
C . When the battery temperature is too low, increase the battery charging voltage.
D . When the mains power is normal and the real-time capacity of the lead-acid battery is lower than the set value, the battery switches from the equalizing charging mode to the floating charging mode.

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Answer: D