Puzzling Ultracap measurements

Today the Maxwell boostcap BCAP0650 arrived, so I did a few quick tests. I'm a bit puzzled over the results. More tests are required to say for certain, but here's the data from two measurements,

Measurement #1:
Description: How long it takes to charge the BCAP0650.
Capacitor initial voltage: 210mV
Capacitor final voltage: 220mV
Current source: 199 mA
Time duration: 26.9 sec
=======
Calculated capacitance = 535 F

Measurement #2:
Description: How long it takes to charge the BCAP0650.
Capacitor initial voltage: 410mV
Capacitor final voltage: 420mV
Current source: 42.1 mA
Time duration: 150 sec
=======
Calculated capacitance = 632 F

Although inconclusive, could this suggest that bcap requires *less* energy to charge when *higher* current is used?

If confirmed, then it appears the bcap behaves as if it has less capacitance when high current is used. When the bcap was charged at 199mA, the capacitance was 535F. So if we place a load across the bcap and drain it at 42.1mA, would it have 632F? If true, then it indicates excess energy.

Tomorrow I'll do the other experiments to know for certain. It's probably nothing, and easily explained, but I thought this was interesting nonetheless. Tomorrow we'll know for certain.

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