Duly filled in.
I don't think much of the tip during the survey to use Li-ion as the best for hill climbing. This isn't true, since chemical exhaustion makes them less capable than NiMh in this respect. That was neatly underlined this morning when the one week old newest of three Li-ions followed the others in dropping below cutout point three times during a 2.25 mile mixed climb. Starting with 8%, followed by 12%, followed by 7% gradually reducing to 6% and finally a short 10%. The cutouts were as usual during the latter stages as the chemical exhaustion bit in.
I can and do climb the same stages, using the same substantial pedal effort with the same bike using the NiMh battery, consistently without any problems.
The batteries concerned are 36 volt, the Li-ions Manganese 10 Ah, the NiMh 9 Ah.