When a stock pack dies on a proprietary commuter bike, you don't get a market of options.
You get whoever built a replacement for that exact bay, which is the position this SMSELER 48V 7.5Ah ebike battery occupies for the Jetson Haze. It is a 360Wh slide-in pack cut to the Haze's 13.39 x 3.74 x 2.2 inch compartment, and at 159.99 it costs about 44 cents per watt-hour, which sits among the most expensive of the 301 packs on our battery table.
That price is the honest problem with this listing, and I will come back to it.
The stranger part is the record around it. Nobody has rated this pack. Not one rating, not one written review, on a page whose own spec table cannot agree with itself about the capacity.
What the page prints, and where it fights itself
Start with the title, which is unusually complete. Bike model, capacity, watt-hours, connector count, motor band, dimensions, and weight are all in the first line, so you can qualify or disqualify this pack before you even scroll. The bullets repeat the same numbers, and the watt-hour math checks out: 48 volts times 7.5 amp-hours is 360 watt-hours.
Then the spec table starts arguing. The Battery Capacity row reads 10.5 amp-hours while the title, the bullets, and the watt-hour math all say 7.5. One of those packs holds 40 percent more energy than the other, and the listing never says which one is in the box.
The weight rows disagree too: Item Weight says 5.84 pounds and Battery Weight says 1.5 kilograms, which is about 3.3 pounds. And the Number of Batteries row claims this lithium pack needs one AAAA battery, which is template junk copied from some other listing entirely.
None of this proves the pack is bad. It proves nobody has proofread the page, which changes how you should buy it.
The fitment math you run before you order
For a replacement pack, three numbers decide everything, and this listing at least prints all three. Voltage first: the Haze runs a 48V system, and this pack is 48 volts, so that part matches. Capacity second: 360Wh is the size of the pack it replaces, not an upgrade, so your range will be whatever the bike's range was when it was new.
Dimensions third: 13.39 x 3.74 x 2.2 inches against the Haze's slide-in bay, and bullet two says it plainly, always verify your compartment before purchase.
The connector story is the same five-pin output plus a separate DC charging port that the Haze uses, which is the reason this pack works where a generic downtube battery would not. There is one decode worth knowing: the Model Number and Model Name rows both read HA318, which is the bike's model, not the pack's.
The pack itself has no stated model number anywhere. If you ever need a matching charger or a second pack, that's the kind of gap that sends you back to the same listing rather than a catalog.
Behind the brand name sits Shenzhen HANI Energy Technology as the manufacturer of record, with SMSELER as the storefront. That split is normal for this market, but it means the name on the box is not the company building the pack.
Nobody has rated this pack, so buy by numbers
Here's where the listing stands out for the wrong reason. The page renders no rating at all, the histogram is empty, and the reviews page reads zero customer reviews. We ran into this on the Yasco 48V 13Ah rebuild, and the method there applies here too: when no owner exists to warn you, the listing itself has to carry the whole case, and this one only partly does.
There is also a drift note worth stating. An earlier version of this article described two five-star reviews that confirmed the fit. Whatever record those reviews belonged to is gone.
The page today shows zero ratings of any kind, so the one thing early buyers seemed to agree on, that the pack drops into the Haze bay unmodified, now rests on the listing's word alone.
That doesn't make the pack a gamble you can't price. The listing carries a one-year manufacturer warranty row and a 30-day return promise, and the stock line says it usually ships within two to three days rather than from stock. Put several full charge and discharge cycles on the pack inside the return window, because a week of commuting will tell you more than the spec table does.
What 360 watt-hours buys on a folding commuter
The motor band here is 120W to 500W, which covers the small hubs that folding commuters actually use. The 30A BMS sounds oversized next to that, and it is: 30 amps at 48 volts is a 1,440W ceiling, while a 500W motor draws about 10 amps. The BMS guards against overcharge, deep discharge, shorts, and heat, which is table stakes rather than a feature.
Range is the honest limit. E-bike packs typically deliver 25 to 75 miles per charge depending on how much work the motor does, and Wikipedia's e-bike overview frames exactly that spread.
At 360Wh on a light folding bike, gentle pedal assist should land you around 24 to 30 miles, and hilly throttle-heavy riding will cut that well short. It's a pack for a commute, not a tour.
The slide-in design is the part that earns its keep on a folding bike. The bay folds, so a rigid downtube bottle pack was never an option, and the tool-free rails mean the pack comes inside with you for charging. If you are weighing packs shaped for folding frames more broadly, our Lolrko 48V 20Ah folding-pack review covers a much larger option in the same form factor.
The price is the honest problem
At 159.99 for 360 watt-hours, this works out to about 44 cents per watt-hour, which places it among the most expensive packs we track.
The comparison table makes that plain: large generic 48V packs sell for less than half of that per watt-hour, and even mid-priced downtube packs land well below this one. You are not paying for energy here. You are paying for a bay nobody else fills.
For a Haze owner with a dead stock pack, that math can still work, because the alternative is a bike that won't run. The fitment is what you're paying for, and there's no cheaper drop-in competing for this compartment on the page.
For anyone else, the answer is simpler: this pack is not for you, and one of the far cheaper general-purpose packs on the comparison table will serve a standard frame better.
So the verdict lands like this. Buy it if your Haze's original pack is done and you have measured the bay, then test it hard inside the return window and lean on the one-year warranty row if anything behaves oddly.
Skip it if your bike takes any standard pack, because the same money buys roughly twice the energy elsewhere on our table. Check the current SMSELER price on Amazon before deciding.
Frequently Asked Questions
Does the SMSELER pack fit my Jetson Haze?
It is cut for the Haze HA318 bay, model PJHAZE-BTK, and the listing says to verify your compartment against 13.39 x 3.74 x 2.2 inches before ordering. No owner reviews exist to confirm the fit, so the measurement is on you.
Which capacity is real, 7.5Ah or 10.5Ah?
The title, the bullets, and the watt-hour math all say 7.5Ah, which is 360Wh. The spec table's Battery Capacity row reads 10.5Ah, which would be 504Wh. Ask the seller which pack ships before you buy, and treat 360Wh as the planning number since three of the four sources agree on it.
Is 360Wh enough range for a commute?
For most folding-commuter distances, yes. Plan on roughly 24 to 30 miles with gentle pedal assist, less with hills or heavy throttle. If your round trip runs longer than that, no pack this size is the right tool.
What warranty comes with it?
The spec table carries a one-year manufacturer warranty and the listing promises 30-day returns. There are no owner reports of how claims are handled, so exercising the return window early is the practical protection.
Can I use this pack on a different folding bike?
Only if the frame has the same slide-in bay, a 48V system, and the same five-pin connector. The listing's fitment row names only the Jetson Haze, and adapters aren't a realistic path for a fitment-specific pack like this one.