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48V 20Ah Electric Motorcycle Battery

Planning a 48V lithium battery for an e-moped or light e-motorcycle build? The KT-E12 gathers 52 cylindrical SWY21700 cells into a 13S4P assembly. The result is 20Ah and 960Wh of stored energy at roughly 5.38kg, with a BMS that passes up to 30A. That output suits compact drivetrains in the 48V class.

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Technical Specifications

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Cell type	NMC	Factory Voltage	49.5 ±0.5V
Rated Voltage	48V	Minimum Capacity	19Ah
Rated Capacity	20Ah	Internal resistance	≤150mΩ
Pack Method	13S 4P	Weight	5.38 ±0.1kg
Charge limiting voltage	54.6V	Standard Charge Current	3A
Maximum Charge Current	4A	Discharge Cut-off Voltage	35.1V
Standard Discharge Current	10A	Maximum Discharge Current	30A
Working Ambient Temperature	Charging：0 ～ 45℃ Discharge：-20 ～ 45℃	Storage Temperature	One year ： -20～25℃ Three months ： -20～45℃ One month ： -20～60℃

Inside the Pack: 13S4P Built from 21700 Cells

Four 5.0Ah cells wired side by side form one 20Ah block. Thirteen such blocks wired end to end raise the voltage. Thirteen times 4.2 V gives the 54.6 V ceiling, and thirteen times 2.7 V gives the 35.1 V floor.

The BMS is a 13S, 30A, split-port design. It keeps the charging path apart from the discharging path, so the charger plugs into one socket and the controller into another. No enclosure ships with the unit.

Plug types and wire pinouts are listed on the interface drawing, which we include with the datasheet.

Matching the Battery to Your Vehicle

A good match rests on five checks:

Controller ceilings: stay at or under 30A
Motor rating
Charger output: 54.6 V cap, 3A normal rate
Space in the bay and the way the unit is held
Plug and wiring layout on both sides

Brand-by-brand vehicle lists and controller protocols are not published here. Each enquiry is reviewed against your own drawings. Please share the vehicle model, controller and motor figures, charger details, bay dimensions and photos of the plugs.

Custom Electric Motorcycle Battery Builds

Is the standard KT-E12 not quite right? Send your target figures and drawings. Our engineers can review these points for your project:

Shape and mounting
Plugs and leads
BMS set-up
Labels and cartons

Each request is judged on its own merits, so a change is not promised until engineering has looked at it.

Product front

Product side

45° side view of the product

Top view

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Certificates and Shipping Papers

Which certificates apply depends on where the unit ships and how it is finally configured. Name your destination market, and we will say which papers we can provide for the KT-E12.

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FAQ

Q1: How much power does the KT-E12 hold?

It is a 48 V, 20 Ah unit, which equals 960 Wh. The capacity floor is 19 Ah.

Q2: What is 13S4P?

Thirteen groups wired in series, each group holding four SWY21700 cells wired in parallel. That adds up to 52 cells of 3.6 V and 5.0 Ah.

Q3: Which charger should I pick?

Choose a 13S Li-ion model that cuts off at 54.6 V. Normal charging is 3A, and the limit is 4A. Compare its plug with the interface drawing first.

Q4: How much current can I draw?

Ten amps is the normal level, and thirty amps is the top level. Discharge stops at 35.1 V. Keep your controller's limit at or below 30A.

Q5: What does it weigh, and how big is it?

Mass is about 5.38 kg. Outline size appears on the approved drawing, which we can send along with the datasheet.

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