Yes that's strange, since these cases are available in black, BH use them on their e-motion models and Gazelle fitted them at one time in their Easy Glider model. Probably Derby Cycles wanting to keep their stock simple.Shame they haven't sourced black battery cases to go with it, otherwise the best Panasonic powered bike I've seen so far.
I just stumbled on this review it may help you if you are looking to buy one of these machine. A very good review interms of it content.....Hi all goodly peeps just came across this name in a cycle forum =Spencer Ivy Spencer electric bike anybody heard of it ? it's a new one on me ..!