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BQ40Z50-R2: BQ40Z50-R2 RunTimeToEmpty accuracy

Part Number: BQ40Z50-R2

Hello. 

I have two questions of RunTimeToEmpty() calculation. 

1. As your description mentioned it depends on the present rate of discharge. 

If the set use dynamic load(such as 10~100W or above), 

how can it calculate on that condition?

2. How accurate is RunTimeToEmpty?

if you have a certain error rate of it, please let me know. 

0x11 RunTimeToEmpty()
This read-word function returns the predicted remaining battery capacity based on the present rate of
discharge.

Thank you. 

Jeongwoo Kim.