DYU SP1 20 Inch Removable Power Bank Folding Ebike Review — Is It Worth It? [2026]
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DYU SP1 Power Bank Folding Ebike
A 14 kg, 20-inch folding e-bike whose battery comes out like a power bank, with a USB port for your phone.
Is the DYU SP1 worth buying?
It depends what you value. The SP1 is the lightest 20-inch folder in DYU's range at 14 kg without the battery, and the removable pack makes charging in a flat or office easy. The cost is battery size: 24V 5Ah is small, which is why DYU also sells a dual-battery version for €1,299. At €1,099 (list €1,499) it is pricey next to the C9, so you are paying for weight and portability, not range.
Light, portable and a bit unusual
The SP1 uses an aluminium frame built with 3D forging, a 250W brushless motor and an LG lithium-ion battery that detaches. The store lists it in Silver, with Single Battery (€1,099) or Dual Battery (€1,299) options.
What makes it stand out
Removable power-bank pack
The battery lifts out so you can charge it indoors, and it supports charging a mobile device. It is 24V 5Ah (about 120Wh), with a charge time of about 3 to 4 hours per the spec sheet.
14 kg without fenders and battery
At 14 kg (30.9 lbs, excluding fenders and battery) it is genuinely easy to lift. The listing says it is compliant for subways, trains and airline travel; check each operator's own rules before relying on that.
Proportional pedal assist
Assist is proportional from 0 to 10 km/h and tapers off from 10 to 24 km/h. That keeps the motor smooth at low speed and tapering as you go faster.
160mm discs and OSRAM lights
TR 160mm disc brakes handle stopping, while OSRAM LED front and rear lights are USB rechargeable. Folded size is 700 x 450 x 620 mm.
Full spec sheet
| Model | DYU SP1 20 Inch Removable Power Bank Folding Ebike |
| Frame | Aluminium, 3D forging |
| Motor | 250W DC brushless |
| Battery | LG lithium-ion, 24V 5Ah |
| Charging time | About 3-4 hours |
| Brakes | TR 160mm disc |
| Lights | OSRAM LED front and rear, USB rechargeable |
| Assist range | 0-10 km/h proportional / 10-24 km/h decreasing |
| Weight | 14 kg excl. fenders and battery |
| Folded size | 700 x 450 x 620 mm |
| Options | Single battery or dual battery |
| Warranty / trial | 12-24 months warranty; 30-day risk-free trial (per product page) |
Pros & Cons
Pros
- Light at 14 kg without the battery.
- Removable battery with USB charging for devices.
- Compact 700 x 450 x 620 mm fold.
- Dual-battery option for more range.
- The page lists 21 reviews, all four and five stars.
Cons
- Small 24V 5Ah single battery.
- €1,099 is a lot compared with the C9 and D3S.
- Spec sheet doesn't give a range figure.
- Dual battery costs €200 more.
- Check train and airline battery rules yourself.
Answers before you buy
Can I take the battery out?
How heavy is the SP1?
What are the battery options?
How long does charging take?
Does it fold small?
Portable first, range second
If your bike spends more time in a lift or a train than on the road, the SP1 makes sense. If you want distance, look at the C9 instead.
This page contains affiliate links. Teelacodes may earn a commission when you click through and complete a qualifying purchase, at no extra cost to you. Read the full disclosure policy. Prices, stock and promotion terms can change without notice — always confirm the final total and availability on dyucycle.com before ordering.
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