YOSE POWER Rear Rack Battery Review: A 36V E-Bike Battery for Bikes Without Down Tube Space

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Not every bike has room for a battery on the down tube. If you’re converting a trekking or city bike with a crowded frame, a step-through, or a small frame, a battery that sits on the rear rack is often the simplest fit. The YOSE POWER 36V Rear Rack Battery with Taillight is one of the German e-bike conversion brand’s best-selling batteries. It comes in 13Ah, 14.5Ah and 15.6Ah versions, with or without a matching rear carrier, from €189 for the battery alone to €279 for the largest pack with carrier.

For this YOSE POWER rear rack battery review, we went through the full technical data, the product images and installation guides, all 54 customer reviews on the store, and YOSE POWER’s shipping and return policies. The goal is to show who this battery suits, which version to choose, and what to check before you order.

Quick Specs

Voltage: 36V (42V full charge, 28V cut-off)
Capacity / energy: 13Ah (481Wh), 14.5Ah (537Wh), 15.6Ah (577Wh)
Cells: DMEGC 26E / 29E 18650 cells
Weight: about 3.2–3.7 kg without the carrier
Current: 10A standard, 20A max, 50A protection
Charger: 42V / 2A, EU plug, about 7 hours for a full charge
Cycle life: 1,000+ cycles
Compatible motors: 36V kits from 250W to 500W
Fits: 26″–28″ bikes with V-brakes or disc brakes
Features: taillight, battery level light, power switch, key lock, controller box
Warranty: 18 months on the battery, 12 months on the charger

Prices and Versions

Version	Price
13Ah, battery only (no carrier)	€189
13Ah with rear carrier	€259
14.5Ah with rear carrier	€269
15.6Ah with rear carrier	€279

Two things to note. First, only the 13Ah battery is sold without a carrier; if you want 14.5Ah or 15.6Ah, you have to buy the carrier too. Second, the step from 13Ah to 15.6Ah costs just €20 when buying with a carrier, so the biggest pack is usually the better value if your motor and riding need the range.

YOSE POWER Rear Rack Battery Review: Design and Fit

The battery slides into a rear carrier that doubles as a luggage rack, and locks in place with a key. The carrier measures about 438 mm long and 149 mm wide, and YOSE POWER shows three ways to attach it depending on your frame. A disc brake link lever is included for bikes with disc brakes, along with a luggage strap.

Several reviewers said installation was straightforward, and one UK buyer fitted it to replace the original Samsung battery on a Prophete e-bike after drilling new mounting holes. Others said the assembly instructions for the carrier were thin, and that some parts’ purposes weren’t clear. If you’re not confident with bike mechanics, plan extra time or ask a shop to help.

Taillight, Controller Box and Controls

The battery has a built-in rear light that you switch on with a button. It’s powered by its own dry-cell battery, not by the e-bike pack, so it won’t drain your range, but you’ll need to replace that small battery when it runs out. YOSE POWER says it can email a manual for this. Other controls include a main power switch, a battery level indicator and the charging port.

Under the battery there’s a small controller box. YOSE POWER’s Lishui controllers fit inside, but larger controllers may not, so check your controller’s size first. The discharge cable connects to your bike’s controller, and an XT60 adaptor is included.

Range: What to Expect

YOSE POWER’s own images give two quite different range figures for the 13Ah battery: one says 45–155 km, another (based on a 20 °C test with a 75 kg rider and a 36V 350W motor) says 50–55 km in power mode and 160–170 km in eco mode. Real-world range depends heavily on assist level, terrain, rider weight and temperature.

Customer reports are more modest and more useful: one Hungarian buyer reported about 60 km “comfortably” in eco mode on average terrain, and a Finnish reviewer said the battery was still working well after almost 1,000 km. For commuting or weekend rides, that’s realistic for a 13Ah pack.

What Customers Say

The product page shows 54 reviews, almost all positive: we counted 46 five-star and 8 four-star ratings, with none lower. Common themes:

Fast delivery across Europe, from the German warehouse.
Easy, plug-and-play setup when paired with YOSE POWER’s own conversion kits.
Good customer service, including quick replacements for faulty parts.
Repeat buyers: several reviewers had bought multiple batteries or kits.

The criticisms are about details: thin assembly instructions for the carrier, a wish for a longer cover over the battery pins to keep out rain, and one buyer whose order took about 15 days to reach Denmark. Also note that the review section mixes in reviews for older versions of this listing, including 17.4Ah and 48V 10.4Ah options that are no longer sold, and some reviews are about full conversion kits rather than the battery alone.

Listing Details Worth Knowing

Motor compatibility: the description says 250W–500W kits, while one product image lists a “matchable motor” of 36V 700W. Stick to the written 500W limit.
Max current: the description says 20A max; one image shows “20A/30A”.
Range claims: 45–155 km in one image versus 160–170 km in eco mode in another, for the same 13Ah battery.
Delivery times: the product page says 4–8 working days outside Germany, the shipping policy says 3–5 working days for other European countries.
EU charger only: the charger has an EU plug, so UK and Swiss buyers will need an adapter.

Who It’s For

DIY converters with a trekking or city bike that has no room on the down tube.
Owners of YOSE POWER conversion kits wanting a matching battery.
Riders replacing an old rear-rack battery on bikes from brands like Prophete.
Commuters who also want a usable luggage rack.

Who It’s Not For

Riders with motors over 500W.
Anyone wanting a low centre of gravity: a rear rack battery puts weight high and at the back.
Buyers outside Europe: it ships from Berlin with an EU charger.
Riders without basic tools or bike skills, given the limited carrier instructions.

YOSE POWER Rear Rack Battery Review: Shipping, Returns and Warranty

YOSE POWER ships e-bike batteries from Berlin within 1–2 days of payment. The shipping policy estimates 2–4 working days within Germany and 3–5 working days to other European countries, with tracking on every parcel. You can choose your capacity and carrier option on the YOSE POWER store.

Returns are accepted within 30 days of purchase for unused products in original packaging, with proof of purchase. You need to email service@yosepower.com for the return address first, and you pay return shipping and carry the risk of damage in transit. Sale items can’t be returned. Refunds are processed within 48 hours of the return being confirmed. The battery carries an 18-month warranty and the charger 12 months.

Pros and Cons

Pros

Rear-rack design fits bikes without down tube space
Up to 577Wh (15.6Ah) for €279 with carrier
Built-in taillight that doesn’t drain the main battery
Controller box, key lock and level indicator
Fast shipping from Germany
18-month battery warranty
Strong reviews and responsive support

Cons

Only the 13Ah version is sold without a carrier
Taillight needs its own replaceable dry battery
Limited carrier assembly instructions
Inconsistent motor and range claims in the images
Buyer pays return shipping
Rack position raises the bike’s centre of gravity

FAQ

Which motors does the YOSE POWER rear rack battery work with?

The description lists 36V motor kits from 250W to 500W.

How long does it take to charge?

About 7 hours with the included 2A charger, according to YOSE POWER.

Is the taillight powered by the main battery?

No. It runs on its own replaceable dry battery.

Can I buy the 15.6Ah battery without the carrier?

No. Only the 13Ah version is offered without a carrier.

What’s the warranty?

18 months on the battery and 12 months on the charger.

YOSE POWER Rear Rack Battery Review: Bottom Line

The YOSE POWER 36V Rear Rack Battery is a practical, well-reviewed choice for DIY e-bike conversions where a down tube battery won’t fit. You get a usable rear carrier, a taillight that doesn’t eat into your range, a controller box and an 18-month warranty, with quick delivery anywhere in Europe. The 15.6Ah version with carrier at €279 is the best value. Just ignore the more optimistic range figures in the images, stay within the 500W motor limit, and allow time for the carrier installation.

That wraps up our YOSE POWER rear rack battery review. See all capacities and carrier options on the official YOSE POWER store.

You might also like: YOSE POWER Hailong Down Tube Battery Review and YOSE POWER 36V 350W E-Bike Conversion Kit Review.