E-bike battery cases for folding bikes
A folding frame has to fold. That single requirement removes most of the range before you look at capacity.
Who this is for: Shops converting folders, and brands needing a pack that does not defeat the fold.
What this build actually constrains
The fold has to clear
Anything that crosses the hinge or fouls the folded silhouette is out, regardless of how many cells it holds.
Frame tubes are short
A 20-inch folder's down tube is often under 350 mm. Most high-capacity moulds simply will not fit.
Small packs, honestly
For most folders the ceiling is around 52 cells, and that is fine — the bike is not doing 80 km.
What we would put on this build
- ['
- Integrated — 28 models, up to 104 cells on 18650 and 80 on 21700. ', '
- Water Bottle — 2 models, up to 52 cells on 18650 and 30 on 21700. ', '
- Downtube — 21 models, up to 200 cells on 18650 and 160 on 21700. ']
Silver Fish
The long profile is the point of a Silver Fish case, and a folder's down tube is the one place there is no length to give it.
Models worth starting from
Full range in every format, with the numbers, in the format comparison.
Questions we get about this build
What battery case fits a 20-inch folding bike?
Will a rear rack case fit a folding bike?
Send us the build and we will say which format works
Frame envelope, cell type, series and parallel count is all we need. If the answer is that none of our moulds fit and it needs a new one, we will say that rather than sell you the nearest thing.