The "1.20" is the individual cell's voltages.
They higher you can get with this number, the better.
Sanyo HV cells average somewhere in the high 1.14's. It's not uncommon to see 1.15's with HV cells
From what I hear and have seen, GP cells average in the high 1.13's to the low 1.14's. A 1.15 with a GP cell is a little more rare.
The next number you listed, 528, would be runtime in seconds.
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