Replacing the battery on a Heybike Cityscape 1.0 is a narrower problem than replacing a battery in general.
The bike takes one pack shape, the aftermarket for that shape is thin, and most listings that claim to fit it really mean something close to it. Yose Power's DF line draws the boundary more tightly than most sellers do. The title names the Cityscape 1.0 and nothing else.
That narrowness cuts both ways, and the buyer record for this pack shows both edges.
One owner has praised the company's support while confirming the pack did not fit their bike at all. Another left a one-star that is hard to read and harder to argue with. A third simply replaced a ten-year-old battery and got on with riding.
This article reads the listing, the parameter cards in the gallery, and every written text in the record. The short version: the numbers are mostly honest with two self-inflicted wounds, the fit line is real, and the price is high.
The Yose Power 36V 13Ah Cityscape battery sells at 239.99, which works out to about 51 cents per watt-hour. That is among the most expensive positions in our comparison table, and the live figure renders in the specs box below, so you can see exactly where it lands against every pack we track.
What the price buys is a pack engineered for one bike's mount, with a key lock, a four-bar charge gauge, and a power-saving switch. Ten people have rated it at 3.9, and the shape of that score matters less than what the written texts are about.
Two of the three buyer texts are about fit
The histogram reads 58 percent five stars, 15 percent four, zero three, 14 percent two, 13 percent one, as printed. Three people wrote anything at all, and every written text carries a purchase badge.
Both negative signals are fitment stories. The September 2026 five-star says it in the first sentence: for that owner it was the wrong battery, and it did not fit their bike. The August 2026 one-star is garbled almost past recovery, and the readable part agrees: wrong battery, too long.
We quote it as printed rather than paraphrase it into a claim it may not support.
Nobody in the record describes a dead cell, a charging fault, or a pack that quit early. When the anger in a record is about the bike the pack went onto, the pack itself is doing fine.
The lesson is the one this category keeps teaching. "Heybike" is not a fitment spec.
The Cityscape 1.0 is a specific frame with a specific mount, and this listing fits that mount and no other. Match the model line first, then the case dimensions, which the listing prints as 75 by 111 by 390.5 millimetres. Capacity and price come last.
The best text in the record praises the seller from the return queue
The most useful text is also the strangest. Its writer bought the wrong pack, and then spent five stars describing how Yose Power handled it: fair, understanding, reliable, and, in their words, a company that cares about the people it does business with.
That is not evidence about the battery. It is evidence about the seller, and it matters for a different reason than a range report. A proprietary-fit purchase carries real risk of a fitment mistake, and this record shows what the mistake costs with this seller: a prepaid return label if the quality issue lands inside one month.
That one-month window is short, and it deserves a plain statement. The fitment risk and the return window both argue for opening the box and test-fitting early, not after the riding season starts.
One owner has replaced a ten-year-old battery with this pack and reports it works much better than the old one did. Their hope that it lasts as long is the only long-term signal in the record, and ten ratings cannot provide another.
The listing argues with its own numbers
The parameter card in the gallery claims 481 watt-hours. Thirty-six volts times 13 amp-hours is 468.
The same 481 figure appears on the DF pack we reviewed alongside the Jasion EB5 battery, so it is a family-wide card figure, not a typo on one listing. It reads like capacity computed against 37 volts instead of 36. Plan range from 468.
The cycle-life story splits too. The bullet promises 70 percent capacity after 700 cycles, and the card next to it says 1000.
Lithium-ion packs typically manage somewhere between 400 and 1,200 cycles before they fade to that level, according to Wikipedia's battery survey, so both numbers sit inside the plausible band, but the listing should pick one. We treat 700 as the promise and the card as marketing.
The discharge card is the honest part. Standard current 10 amps, maximum continuous 20, protect current 50, end voltage 28 volts. Twenty amps at 36 volts is a 720-watt continuous ceiling, and the listing claims compatibility with motors up to 800 watts.
A top-spec 800W motor would run past what the board allows continuously, so plan around 720.
Two smaller wounds are worth naming. The spec table lists the capacity as 13 milliamp-hours, which is off by a factor of a thousand and obviously a template error. And the charging bullet promises a full charge in 7 hours while stating in the same breath that no charger is in the box.
Range plans from the card's own test conditions
The gallery's range card is unusually specific about its conditions: 20 degrees, a 70-kilogram rider, a 350-watt motor, pedal assist. Under those conditions the card claims 45 to 50 kilometres in eco mode and 155 to 160 kilometres at the top end.
That 155-kilometre figure is a pedal-assist number, and pedal assist is the mode where your legs do most of the work. It works out to about 4.8 watt-hours per mile, which is what a fit rider contributes. Under throttle or heavy assist at a realistic 20 to 25 watt-hours per mile, 468 watt-hours carries you about 19 to 23 miles.
The card deserves credit for printing its test conditions at all. Most listings print the big number and hide the conditions. Just read the big number as the ceiling of a very specific experiment, not as a promise.
Who this pack is for, and who should keep looking
If you ride a Cityscape 1.0 and the original pack has died or faded, this is the purpose-built replacement, the record's only real criticism does not apply to the pack, and the seller has a documented record of absorbing fitment mistakes gracefully.
If you ride anything else, the record itself is the warning. Two of three buyers had fitment trouble of some kind, one of them with a pack that was simply too long for their frame. The 48V Mars sibling covers the Mars 1.0 the same way, and our comparison table lists dozens of universal packs that cost half as much per watt-hour if your bike takes a standard form factor.
Anyone price-sensitive should also look at the value line honestly. At 51 cents per watt-hour this is one of the most expensive packs we track, and the premium buys the fit, not the chemistry. The cells are DMEGC-26E according to the card, the 3.5-kilogram weight closes sensibly against the capacity, and nothing in the numbers is dishonest except the two figures already covered above.
Frequently asked questions
Does it come with a charger?
No. The bullet says so directly, and the packing list card shows a battery pack, a key, and a manual. The 48V sibling's record shows the practical answer: its owner's original Heybike charger matched this pack's port exactly, and the same should hold on the Cityscape. Keep your old charger unless it is the part that failed.
How long does a full charge take?
The listing says 7 hours, and the arithmetic agrees with a 2-amp charger: 13 amp-hours at 2 amps is a 6.5-hour floor. The charge socket caps input at 5 amps, so a stronger charger could cut that below 3 hours if the pack's electronics allow it.
What happens if it does not fit my bike?
Inside one month, the listing promises a prepaid return label for quality issues, and one owner has described the support process warmly after exactly this mistake. Past that window you are outside the promised coverage, so test-fit early.
Is a 3.9-star score a bad sign?
Not here. Ten ratings is a small sample, the histogram has no three-star band at all, and both written criticisms are fitment stories rather than product failures. A larger record would help, and it does not exist yet.