Replacement battery shopping has a step most listings let you skip: confirming that the pack on the page is still the pack the page describes.
With ShunTongDa's 48V listing, that step is the whole story. The photos and title sell a silver fish shell for VIVI bikes, the spec table still carries the model name of a folding pack, and a buyer from last spring describes a 14Ah unit that matches neither.
That matters more here than it usually would, because the fit record on this listing is a coin flip.
One buyer in April 2026 got an exact-fit install with working locks and reported 20 to 25 miles of easy riding. Another buyer, eight days earlier, says the pack did not fit the bike as advertised and could not be sent back. Same listing, same month, opposite outcomes.
This review walks through what the live page actually says, where it contradicts itself, and what the five written reviews do and do not settle. The comparison table holds the price-per-watt-hour numbers, and the arithmetic you cannot skip happens before checkout, with a tape measure.
The ShunTongDa 48V silver fish pack sells at 188.00 with an active buy box, and on price per watt-hour it sits in the pricier band of the 301 batteries we track, which you can check on the same comparison table. The value case is not the reason to buy it or skip it.
The reason is the fit question, and the record splits exactly in half on it: one owner has reported a perfect install with exact connections, a working key lock, and 20 to 25 miles with minimal battery drain at roughly half what the dealer wanted, while another says the pack does not fit the bike as advertised and the return window closed on them.
If you can measure the mounting cavity, confirm the five-pin port, and accept a one-year warranty as the whole backstop, the price stops being the problem. If you cannot, no price fixes it.
One ASIN, three products
The drift on this listing has three dated layers, and the star rating pools all of them. The oldest layer is March 2024, where a five-star text describes a DHC-6 48V 14Ah battery consistent with its description. That review carries no purchase confirmation, and the 14Ah pack it praises matches nothing on the current page.
The middle layer is what our own records hold: a 10.4Ah folding pack at 499.2Wh, sold under the DCH-006 name. That is the pack the old review article described, and the model number most search results still attach to this ASIN.
The current layer is the live page. The title reads 48V 10Ah Silver Fish, names VIVI 500W C26 and MT20 bikes, and the spec table still says Battery Capacity 10.4 amp hours and Item Type Name DCH-006. So the page sells 10Ah in the title and 10.4Ah in the table, under a model name that belonged to a folding pack, in a shell the old article never covered.
The dimensions repeat the pattern. The build bullet gives 390 by 75 by 111mm, which is the common silver fish shell.
The spec table gives 4.02 by 1.69 by 16.93 inches, which works out to about 430mm long, a tube shape closer to the silver fish pack in our separate ShunTongDa review. Two different lengths, on one page, for one pack. I don't know which one ships, and the page cannot tell you.
The fit reports disagree, and the shell explains why
The two April 2026 texts are eight days apart and land on opposite sides. The later one says the install was perfect, the connections were exact, and the key and locking mechanism worked without issue. The earlier one says it does not fit the bike as advertised and the buyer could not return it.
Neither names the bike model in detail, which is the gap a replacement buyer most needs closed.
Grin Technologies' connector guide puts the category problem plainly: there's no real standardization on connector type or pinout across ebike systems.
A silver fish shell is a shape, not a plug. The five-pin base on this pack will not mate with a four-pin cradle, and the key position decides whether the pack locks into your tray at all. Buyers of a different silver fish pack we reviewed have run into the same wall, where the shape matched and the mount did not.
That's why the two dimension sets on the page turn a routine check into a mandatory one. If the cavity in your frame takes a 390mm shell and the box contains the 430mm tube, the fit complaint writes itself, and the title's promise to VIVI C26 and MT20 owners does not survive the trip.
Ten or ten point four, and what a 2A charger does with either
The capacity question stays open because nobody in the record has metered the pack. The title says 10Ah, which is 480Wh at 48 volts. The spec table and the package list say 10.4Ah, which works out to 499.2Wh.
The difference is one part in twenty-five, small on a label, real on a ride.
Charging is arithmetic either way, because the box includes a 54.6V 2A charger. A 2A charger moves roughly 96 to 109 watts into a 48V pack, so a full fill of 480 to 499Wh lands near five hours. That's an afternoon top-up rather than the overnight job the bigger packs need.
The LED charge indicator is the only state-of-charge tool on the pack, so you're reading four lights, not a watt-hour meter.
Range has one owner figure and nothing else. One rider has reported 20 to 25 miles with minimal battery drain after an initial short ride and full charge. The energy-use bands at ebikes.ca put a 480 to 499Wh pack at roughly 37 to 52 miles with minimal assist, 25 to 34 miles with typical pedaling, and 15 to 21 miles throttle-heavy, in ideal conditions.
The owner's figure sits at the bottom of the assisted band, which is consistent with a pack that may be closer to 480Wh than its label claims.
One honest thing about this listing: it makes no cycle-life claim at all. Category sellers routinely promise 1000-plus cycles, and this page promises nothing, which beats a number nobody can check. The flip side is the same page calling its cells Grade A, which is a seller word rather than a spec, with no cell brand and no chemistry named anywhere.
The waterproof word, and a power ceiling that does check out
The listing claims an IP65-rated waterproof case. Under the IEC 60529 scheme, the 6 in IP65's first position would mean dust-tight, and the 5 means protected against water projected in jets from any direction. Read it as rain-proof on a mounted pack, not dunk-proof, and not a promise about pressure washers or stream crossings.
The power claim survives its own arithmetic, which is rarer than it should be. A 30A BMS at 48V delivers about 1440W continuous on a fresh pack, and the listing's motor window runs 0 to 1000W, so the protection sits above every motor the page names with headroom to spare.
The five-pin port, the LED indicator, the anti-theft key lock, the power switch and the alloy steel casing round out the hardware, and the box includes the charger, a mounting bracket, two keys, six bolts and a manual.
The spec table's care signals are worth a glance before you order. Number of Batteries reads "52 Lithium Ion batteries required," which describes neither a 10Ah nor a 10.4Ah pack in any unit I can make work. The warranty is one year, covering a pack whose seller promises no lifespan figure at all.
Treat that year as your test window: charge it full, ride it close to home, and meter a full discharge inside the first month.
Frequently Asked Questions
Will this fit my VIVI C26 or MT20?
The record can't settle it. On one side, an owner has reported a perfect install with exact connections and a working lock. On the other, another says it does not fit the bike as advertised.
The page carries two dimension sets, 390 by 75 by 111mm and about 430 by 102 by 43mm, so measure your cavity before ordering and match the five-pin port and key side. If your tray takes the shorter shell, the title's VIVI fit claim is the only assurance you get.
Is the capacity 10Ah or 10.4Ah?
The title says 10Ah and 480Wh. The spec table and the package list say 10.4Ah, which is 499.2Wh.
Nobody in the review record has metered either figure, so the honest answer is that the page contradicts itself and the buyer finds out at the meter. The one-year warranty is the window to do that in.
Is the battery waterproof?
It carries an IP65 rating, which under the IEC 60529 scheme means dust-protected and resistant to water projected in jets. That covers rain on a mounted pack. It does not cover submersion, and the rating doesn't stack upward to immersion.
How much range can I expect?
The one range figure in the record comes from an owner who has reported 20 to 25 miles with minimal battery drain. As arithmetic, the ebikes.ca energy bands put 480 to 499Wh at roughly 37 to 52 miles with minimal assist, 25 to 34 miles with typical pedaling, and 15 to 21 miles when you lean on the throttle. Actual distance depends on rider weight, terrain and assist level more than on anything the label says.
Can I return it if it doesn't fit?
The record already holds a no. The April one-star reports the pack did not fit as advertised and was not returnable, so the fit check has to happen before the order, not after. Check the cavity length, the port pin count and the key position against your current pack, and if any of the three is ambiguous, the listing's own contradictions give you no fallback.