[john]

Here are some test results:

First test, using Crystalyte 409 motor (not the most efficient), totally thrashed it with minimal pedalling; 13 miles to cut-out, 18.5 mph average.

Second test, same motor but more typical pedalling and less throttle; 25 miles to cut-out, 16.5 mph average.

I've not measured the voltage during use, but can tell from the performace that it holds up well throughout the discharge cycle and under heavy load, as others have reported with LiFePO4.

I don't have a way of measuring total battery output energy, but energy from the mains to fully charge is about 500Wh. Assuming a good charging efficiency, I would say that the battery capacity is as advertised.