Rapid depletion suggests improper battery calibration. Your reader thinks that it has 35% left based on when the battery was new, but now 35% is actually 10%. My Libra does not exhibit this problem. I've been trying to calibrate it by discharging below 10% and charging to 100% a few times. The meter seems more stable now than when I first got it, so I'll switch to using 20 - 90% charging thresholds.
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