I need help finding what is my UPS battery life time

[NotMe]

Hello
I have a UPS called Advice Ecom 600
I was trying to figure out how to calculate the Battery up time using this formula
"Estimated total battery life = (Ib / Id) x 0.7
Where: Ib = Total Capacity Rating of battery (mAh) and Id = Current Consumption of the device in milliamps (mA)"

but i couldn't figure out what to put where

Since this is all gibberish to me, I'll write the Info i have about the UPS:

Capacity: VA/W 600VA/360W

Input Voltage: 230VAC
Input Voltage Range: 160-276VAC
Input Frequency: 47-63Hz (auto detection)

Output Voltge: 230VAC
Output Voltage Regulation (Batt Mode): ±10%
Output Frequency: 50Hz
Output Frequency Regulation (Batt Mode): ±1Hz
Output Waveform: Modified Sinewave

Battery Type: Sealed Lead Acid Battery
Battery: 12V/7A x 1pcs
Recharge Time: 8 Hours To 90% After Complete Discharge

Typical Transfer Time: Less Than 3ms

The Load on it is usually Around 48%
Temprature is 37.8C

Can someone help me with this one?
did i miss some piece of info?

Thanks,
Yair