Silver fish packs are the default battery format on budget ebikes, and the replacement market for them runs on lookalike listings. The LZIXYM 48V 13Ah holds 624 watt-hours behind a 25A BMS in a shell about 390 by 75 by 111 millimeters, with a bottom-mounted 4-pin discharge port, an LED gauge, a key lock, and no charger in the box, at 169.00.
When we first covered this pack in August, the review record stood at two five-star ratings and almost nothing else. Today the page shows six global ratings, five written texts, and a first four-star band, and the texts have turned out to be more useful than the star count, because nearly all of them are installation reports rather than verdicts.
Every report is an install story
Three of the five written texts carry a purchase badge, and those three are the ones with substance. Two of them describe trike conversions. One owner has fitted this pack to a Narrak S180 trike and reported about 50 percent more range than the trike's tired original 13Ah battery, but the fit took work: soldering, wire connecting, and some reshaping of the base plate.
The same owner then reversed the polarity wiring on the old Narrak pack and used it as a spare, which pushed total range up further still. Another owner has reported a perfect fit on an Ancheer trike with a few more amps than the stock pack delivered.
The listing's own fitment text names no trikes, so the knowledge a trike buyer actually needs lives in these reviews, not in the listing itself. Both conversions also confirm the one spec that decides everything here: the 4-pin discharge port on the bottom of the case.
The two texts without purchase badges landed on the same August day, and one of them is seller-praise promo copy through and through, thanking the seller for fast communication. Treat the pair as advertising. The 24 percent four-star band carries no text at all, so the only critical signal on the page stays mute, and nobody has reported long-term durability, water exposure, or a measured capacity test.
The listing cannot settle on a weight
The first bullet prints 9.0 pounds, or 4.1 kilograms. The spec table's own battery weight row reads 7 pounds. That is a two-pound argument inside one listing, and the listing offers no third number to break the tie.
The family context makes it worse. The LOCKBUS pack that carries the identical model number prints 7.58 pounds in three agreeing rows, and the LGNUO sibling prints 7.94 pounds against a 3.5 kilogram row that doesn't match. One shared platform now shows four printed weights across three storefronts.
The chemistry row doesn't help either, since it reads Other Than Listed, which is a spec table declining to name its own cells.
Weigh the box when it arrives. Anything in the 7 to 9 pound band is normal for a silver fish of this size, so the number won't tell you the pack is bad, but it's the only way to know which listing claim was real. The listing claims no cycle count, so there's no durability promise to weigh against the band.
The model number is the LOCKBUS's, letter for letter
The spec table prints model FP4813R0Z69, which is the exact string the LOCKBUS 48V 13Ah carries, and the manufacturer row reads Dongguan Yizhan Electronics Technology. That is the same factory line behind the LGNUO 48V 13Ah with its FP4813R0 code and the 48V 20Ah LZIXYM pack with FP4820R0. Four storefronts now sell one platform, with the capacity digit sitting in the middle of the shared model code.
The prices fan out around the same 624 watt-hours: 169.00 here, 160.99 for the LOCKBUS, 169.00 for the LGNUO.
The shells differ more than the prices do. This one measures about 390 by 75 by 111 millimeters, the LOCKBUS folds into about 358 by 135 by 90, and the LGNUO runs about 392 by 76 by 111. The offers page shows the same seller name, Hengzan, behind both LZIXYM listings we have checked.
None of this makes the pack a bad buy. It means you're shopping for a shell and a price, not for a brand, and the shell you need is the one that matches your frame slot and your port. We have watched this platform sell under four names in one month, and we'd rather pick by tape measure than by logo anyway.
The BMS math holds, and the port decides the fit
The 25A board allows about 1,200 watts of continuous draw on 48 volts, and the title brackets this pack at 750W motors, which pull about 15.6 amps at full load. Unlike the 20A and 30A boards on its siblings, whose own 1000W claims outran them, this listing's numbers agree with each other, and a 500W or 350W machine runs with room to spare.
The bottom 4-pin port is the spec that can waste your money if you skip it. Most silver fish packs put the discharge connector on top, and the listing devotes a whole bullet to warning that this one sits underneath. Match it against your bike before you order, because an adapter isn't always available for a port on the wrong face.
There is no charger in the box, only the battery, a holder, a manual, and two keys. On a typical 2A charger, 13 amp-hours takes at least six and a half hours from empty before the taper, so plan on overnight charging from the first day.
What 624 watt-hours does for range
Range planning needs no promise from the listing, because the method works for every pack.
E-bikes usually manage 25 to 75 miles per charge depending on the power level you ride at (Wikipedia, E-bike), so take the range your current battery really delivers and multiply it by the ratio between its watt-hours and 624. Replacing a smaller worn pack with this one adds about half again your familiar range, and heavy throttle riding trims the number hard.
Lithium-ion chemistry holds up for 400 to 1,200 cycles to the 80 percent convention (Wikipedia, Lithium-ion battery). The listing claims no cycle count of its own, so the honest reading is that the low end of that band is what a budget pack owes you, and the trike owners' weeks of use are the only longevity signal on the page so far.
At 169.00 for 624 watt-hours you pay about 27 cents per watt-hour, which sits close to the middle of the 301 packs we track, and our data row agrees. The LOCKBUS asks 160.99 for the same platform in a different shell, so check both footprints before you pick. See where the price sits today against the field in our ebike battery comparison table.
Frequently asked questions
Will it fit my bike?
Measure your current battery first. The shell is about 390 by 75 by 111 millimeters and mounts behind the seat tube, so the slot needs to accept both. Then match the discharge port, because this pack's 4-pin connector sits on the bottom of the case rather than the top.
Does it come with a charger?
No. The packing list is the battery, a holder, a manual, and two keys. A 2A charger takes at least six and a half hours from empty on this capacity.
Can I trust the printed weight?
Not on its own. The bullet says 9.0 pounds and the spec row says 7, and the same platform shows four different printed weights across three storefronts. Weigh the box on arrival.
How does it compare to the LOCKBUS and LGNUO packs?
Same factory platform, same 624 watt-hours, and prices between 160.99 and 169.00 across the storefronts. The shells and port positions differ, so the decision is footprint and connector location, not brand.
What does the review record say?
Six ratings with five written texts, three of them verified trike and bike fit reports, two unverified seller-praising lines from the same August day, and no written criticism anywhere on the page. Buy on the specs and the return window, and treat the record as a fitment log rather than a verdict.