Pink is one of Sam's often used cell wrap 22F, 26F, 26H, 26J, 29E, 30Q & 35E are all pinkies and most popularly used battery cells.
I carried both a 11ah (22F) & 13ah (26F) for about 100 miles range though I used a rear rack top bag when I had the oxydrive kit with the superb Bafang CST hub and swapped them over when lvc was hit .
The batteries only lasted me two years as I would drain them to lvc all the time to get the max range ( batteries imv are for using and there is always something better to use next time ). The cells as expected lost capacity so range dropped quite a bit and would only get me some 60 -65 miles , I still have most of the cells now some 8 /9 years on . They are used in torches some reconfigured for two 12s packs for other uses and the 22F's are still complete as a 36v softpackwhich also has another use where current draw or mileage isn't needed.
Later on I used a PF 14.5ah on the down tube and a PF 23.2ah in the rear rack bag , handling was good when riding but a bit cumbersome if pushing or manhandling the bike sometimes. This became my longer range set up and I could return home with 40% remaining and never hit LVC.
Old cell packs still have uses or the cells as individual cells do, one reason why I don't take them to a recycling centre until absolutely knackered. One can use them as mentioned for torches, reconfigure for smaller packs for power tools or low voltage gadgets where current demand has little effect on their usage.
If one had enough cells of the same mah then they could be made up into a power bank if one had solar or a stand alone panel in the garden to charge it with or wanted to make use of cheap electric rates with some tariffs.
One could easily use old cells for a larger portable power bank to run a pc /laptop, kettle or lighting during a rare power outage or as a regular supply for a pc etc,etc.
