Ha! Probably would help tho it's only 3yrs/9700miles in so I'll persevere.
Annoyingly the e-tandem we'd earmarked last year with Bosch mid drive was a horrid ride so we went for an Orbit with Shimano power - so can't interchange batteries.
Anyway, I'm mostly doing 10-15miles a day so not an issue.
You need another battery!