Thanks again for all the replies. Cycling batteries seems to be a confusing topic for me, but I thought the discharge cutoff of 1.1V was conservative, and in the future I will drop this to 1.0 or 0.9, and see how that impacts the total battery capacity.

Luckily I have a replacement battery on hand, 1600mAh 4.8V NiCd, and am doing an initial slow charging at 150mAh for 16 hours. After one slow charge with this new battery, should I cycle with these settings, or a lower peak charge rate?

NiCd, 4 cells, peak charge 0.8A, trickle 80mA, peak sensitivity 8mV/cell, discharge 0.3A, discharge cutoff 0.9V/cell?

Thanks