Yes — the JD-012SR (SYR Kingkong) is a 36V / 48V / 52V integrated e-bike battery platform built with 21700 Li-ion cells, and it is a verified fit for 10 electric bike models, including the Himiway Zebra, Zebra Step-Thru, Cobra, Cobra Pro, Big Dog, D5 Pro and D5 Pro ST. Himiway's own pack for these bikes is a 48V 20Ah (960Wh) unit, so a 48V 20Ah JD-012SR matches the original voltage and capacity. The platform uses a hardware BMS that a third party can replace — there is no communication handshake to defeat. Before ordering, confirm three things: your bike's voltage (48V on all Himiway models listed here), the battery's physical case dimensions, and the discharge port and mounting pattern on your existing pack.

This guide lists every verified compatible model, the specs to match, and the fitment checks that prevent a return.

What Is the JD-012SR Kingkong Battery?

The JD-012SR is an integrated (in-frame) downtube battery — the type that sits inside or on top of the frame's down tube rather than in a rack or on a rear carrier. "Kingkong" (金刚) is the shell name; SYR is the platform family.

Key platform facts, per our own product listing (product No. JD-012SR):

Cell format: 21700 Li-ion cells
Voltage options: 36V, 48V, 52V
Cell configuration: packs are built to the voltage and capacity your bike requires (e.g. a 48V pack uses 13 cells in series)
BMS: hardware BMS, third-party replaceable
Mounting: integrated downtube shell with the original-style clip-in / rail mount
Compatible models: 10 verified e-bike models (listed below)

Because the shell is designed as a drop-in replacement for the original pack, the fit is determined by the case outline, the discharge port and the locking mechanism — not by the bike's brand name.

Battery Specs to Match Before You Buy

Use this table as your checklist. Every row must match your original battery, or the pack will not seat correctly.

Parameter	What the JD-012SR platform uses	What to check on your bike
Voltage	36V / 48V / 52V options	48V for all Himiway models in this list (13S, full charge 54.6V)
Capacity	Built to match the original pack (Himiway Zebra & Cobra family stock pack: 48V 20Ah / 960Wh)	The Ah printed on your existing label
Cell type	21700 Li-ion	N/A — internal
BMS	Hardware BMS, third-party replaceable	Confirm your bike has no BMS-communication lock
Case type	Integrated downtube (Kingkong shell)	Case length, height and profile
Discharge port	Shell-matched output connector	Pin count and port shape
Mount / lock	Original-style rail mount with key lock	Rail position and key barrel location

A note on capacity: Himiway lists its own replacement pack for the Zebra / Cobra / Big Dog family as a 48V 20Ah (960Wh) unit rated for up to 40+ miles per charge with a 6–7 hour full charge. Matching that 48V 20Ah specification keeps your range, controller behaviour and charger unchanged, which is the safest approach for a replacement.

Which E-Bikes Use the JD-012SR Kingkong Platform?

This list is compiled from our own model-to-bike compatibility data (10 verified models, all 48V) and cross-checked against manufacturer specifications.

Himiway — 7 models

All of these run a 48V 20Ah battery from the factory:

Himiway Zebra
Himiway Zebra Step-Thru
Himiway Cobra
Himiway Cobra Pro
Himiway Big Dog
Himiway D5 Pro
Himiway D5 Pro ST

The Zebra, Cobra and Big Dog share the same battery format, which is why one replacement part covers so many bikes in the range.

Freesky

Freesky Wild Cat (48V 20Ah)

Asomtom

Asomtom E300

Other verified 48V models

PHOENIX WAVE
SPATIAL
OVERFLY (48V 20Ah)
A-0 (48V 20Ah)
EBIX M910

> ⚠️ Fitment note: the JD-012SR is verified for the models above. If your bike is not listed, send us your battery's label photo and case measurements — the shell is shared across several platforms, so a different model may still fit.

Why 21700 Cells Matter in This Battery

The JD-012SR is built around 21700 cells (21mm diameter, 70mm length) rather than the older 18650 format (18mm × 65mm). That matters for three practical reasons:

More capacity per cell — a 21700 cell typically stores more energy than an 18650 cell of the same generation, so the same case volume can hold more watt-hours.
Higher sustained current — larger cells handle continuous discharge with less heat build-up, which suits 750W+ motors that pull current for long climbs.
Better thermal behaviour — more surface area per cell and lower internal resistance means less heat stress over the pack's life.

The practical result: a 21700 pack can deliver the same range as an 18650 pack while running cooler, or more range in the same shell. If you want the full explanation of how cell format and capacity interact, see our guide to e-bike battery amp hours and range.

The BMS Question: Why "Third-Party Replaceable" Matters

Some modern e-bikes use a battery with BMS communication — the pack talks to the controller, and a non-OEM battery either throws an error or refuses to run. That is the single biggest reason replacement batteries fail to work.

The JD-012SR platform uses a hardware BMS, which means:

The pack protects itself (over-charge, over-discharge, over-current, short circuit, temperature) without a digital handshake with the controller.
A third party can supply and service it — you are not locked to the original manufacturer.
Replacement is a plug-and-play swap once voltage, capacity and connector match.

That last point is exactly why an aftermarket replacement is practical for this bike family: the original pack is an electrical component, not a coded one. For a deeper explanation of balancing, cut-off thresholds and what to look for, read our guide on what BMS to look for in an e-bike battery.

Fitment Checklist: 5 Things to Confirm

Before ordering a replacement, work through these five points in order:

Voltage. Read the label on your original pack. All bikes in the list above are 48V — do not substitute 52V unless your controller is explicitly rated for 58.8V input. See our 36V vs 48V vs 52V voltage guide.
Mounting pattern and port. Compare the rail position, the discharge port shape and the pin count. This is what makes a pack a true drop-in replacement rather than a "close enough" fit.
Case dimensions. Measure the length, height and profile of your old pack. Shell families look similar but differ by a few millimetres — and the difference matters.
Capacity. Match the original Ah (48V 20Ah on Zebra / Cobra / Big Dog / D5 Pro) so your charger and controller behaviour stay unchanged.
Safety certification and inspection. Check the pack's certification and inspect the unit on arrival — see our UL 2849 and UL 2271 breakdown and our safe battery checklist.

If you are replacing a pack for the first time, our replacement battery buying guide walks through the whole decision path.

Common Questions About Himiway Battery Replacement

Will a JD-012SR work in my Himiway Zebra?

Yes — the platform is verified against the Himiway Zebra, Zebra Step-Thru, Cobra, Cobra Pro, Big Dog and D5 Pro / D5 Pro ST. Match the 48V 20Ah specification of the original pack.

Can I upgrade to a higher-capacity battery?

You can use a higher-Ah pack of the same voltage if it physically fits and the BMS current rating covers your controller, which typically means more range rather than more speed. Do not change the voltage unless the controller is rated for it. Remember that capacity and weight trade off — see our amp-hour and range guide.

Why did my original battery stop charging?

The usual suspects are a blown fuse, a failed BMS, a dead cell group, or a charger fault. If the pack is out of warranty and a rebuild is not economic, a replacement pack is the practical route.

Is an aftermarket battery safe?

Safety comes down to cell quality, BMS protection and build quality — not to whether the badge says OEM. Confirm certification, buy from a supplier that publishes its specs, and inspect the pack on arrival.

Does the Kingkong shell fit other brands?

Yes. The same 21700 Kingkong platform is verified for Freesky Wild Cat, Asomtom E300, PHOENIX WAVE, SPATIAL, OVERFLY, A-0 and EBIX M910 in addition to the Himiway models.

How do I store the new pack in winter?

Store it indoors at around 50% charge and avoid freezing temperatures — our winter storage guide covers the details.

Get the Right JD-012SR for Your Bike

The JD-012SR Kingkong is a 21700 integrated battery platform covering 10 verified 48V e-bike models, with a hardware BMS that a third party can replace — no communication lock, no proprietary pairing.

To order the correct configuration, tell us:

Your bike model and year
The voltage and Ah printed on your original pack
A photo of the old battery's discharge port and mounting rail

ShunTongDa supplies replacement e-bike batteries across 36V, 48V and 52V platforms with published specifications, US/EU/AU/UK stock options and worldwide shipping.

View the JD-012SR Kingkong battery → or contact us with your bike details and we will confirm the fit before you buy.