The battery is inserted into the frame not on the frame. Interesting, if the pins are the same as in the photo then maybe it could work. Could you send a link to one you thought would work please.
Hi, here are three photos, one showing the 2 pin entry with spec and the second the battery, the third the new battery which is available from Stromer but not on their web site (as this is an old bike so the original battery is no longer listed)
I'm looking to buy a used Strommer ST1 from 2012. Battery goes to 30% after 30km of flat surface moderate use. Any advice. I'm based in Poland regarding sending the pack for a redo. What do you recommend I do.