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Silver Fish Battery Cases

Tapered shells that slide into a frame or seat-post carrier — the retrofit standard for folding bikes, mountain frames and conversion builds.

16 models 36 V – 72 V 18650 / 21700 MOQ 1 piece
ALX021 Silver Fish Frame Mount — empty e-bike battery case
ALX021 · SILVER FISH

Silver Fish Frame Mount

Frame mount for folding and mountain bikes. Our highest-moving single part number.

MOQ 1 · quote in 5 hDetails
ALX072 Flexible MOQ Shell — empty e-bike battery case
ALX072 · SILVER FISH

Flexible MOQ Shell

Custom solution with a flexible minimum, sized for startups as much as brands.

MOQ 1 · quote in 5 hDetails
ALX061B ABS+PC Impact Resistant — empty e-bike battery case
ALX061B · SILVER FISH

ABS+PC Impact Resistant

The lowest-cost entry in the range, and customisable without a mould change.

MOQ 1 · quote in 5 hDetails
ALX063 Bulk Order Silver Fish — empty e-bike battery case
ALX063 · SILVER FISH

Bulk Order Silver Fish

Built for e-bike brands and battery assemblers buying in volume, not by the piece.

MOQ 1 · quote in 5 hDetails
ALX042B Rapid Prototyping Shell — empty e-bike battery case
ALX042B · SILVER FISH

Rapid Prototyping Shell

Fast sample delivery for new projects — a physical part before you commit.

MOQ 1 · quote in 5 hDetails
ALX027 High-Volume Silver Fish — empty e-bike battery case
ALX027 · SILVER FISH

High-Volume Silver Fish

ABS and aluminium alloy construction for bicycle factories producing at volume.

MOQ 1 · quote in 5 hDetails
ALX036 Custom Logo & Mould — empty e-bike battery case
ALX036 · SILVER FISH

Custom Logo & Mould

OEM and ODM with custom logo printing and mould opening for global manufacturers.

MOQ 1 · quote in 5 hDetails

Showing all 16 models in this series. Every one is an empty shell — you supply cells, BMS and harness.

About this series

Why buyers choose Silver Fish

The Silver Fish profile is the classic retrofit shape: a tapered shell that slides into a bracket on the frame or seat post. If you are replacing a Silver Fish case or building a conversion kit, this is almost certainly the family you want.

Material options run from straight ABS through ABS+PC for higher impact toughness to ABS with aluminium-alloy reinforcement for heavier duty cycles. Several models are available with the internal structure exposed as a technical drawing.

Volume pricing moves once you are ordering in the hundreds, but the minimum stays at one piece — repair workshops buy single units from us every week.

  • The retrofit standard — Fits frame and seat-post carrier brackets already on the market.
  • ABS, ABS+PC or aluminium-reinforced — Pick the duty cycle, not just the price.
  • Wide voltage coverage — Most models span 36 V to 72 V.
  • Repair-shop friendly — Single-unit orders ship the same way as container loads.
Get a Quote All battery cases
Silver Fish battery case mounted on a folding e-bike
Silver Fish on a folding frameSeat-post carrier, retrofit fit
Other fitments

Compare with the rest of the range

Hailong Battery Cases

The universal fitment. Waterproof ABS and PC+ABS shells with key lock, cable exit and mounting kit options, sized for 18650 or 21700 packs.

Integrated & In-Frame Battery Cases

Hidden housings that sit inside the down-tube, plus conversion kits with aluminium-alloy reinforcement.

Downtube Battery Cases

Housings that sit inside the down-tube, taking 18650 packs to 104 cells. The largest family we hold tooling for.

Rear Rack Battery Cases

Flat rack-mounted housings for cargo, delivery and long-tail builds — to 104 cells, without widening the bike.

Water Bottle Battery Cases

Mounts on standard bottle bosses — the lowest-cost way to add range to a frame with no down-tube space.
Ten Haitian injection moulding machines running in a line at the ALX factory in Guangzhou
Moulded in house10 Haitian injection moulding machines
Finished e-bike battery cases racked ready for dispatch
Racked and readyEmpty shells, inspected before dispatch
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Tell us your voltage, cell type and dimensions

That is all we need to point you at the right case. Quoted within five hours, MOQ one piece.

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