Description
BAK 13S 48V 70000mAh (70Ah) 13S14P 3C Lithium-Ion Rechargeable Battery Pack
The BAK 13S 48V 70000mAh (70Ah) 13S14P 3C Lithium-Ion Rechargeable Battery Pack is a high-capacity NMC lithium-ion battery pack designed for 48V-class e-bikes, electric scooters, electric motorcycles, EVs, industrial equipment, and high-capacity energy-storage applications.
This pack uses BAK N21700CG-50 21700 lithium-ion cells, rated at 3.6V nominal voltage, 5.0Ah typical capacity, and up to 3C maximum discharge rate.
Key Features
- BAK 21700 5000mAh cells
- 13S14P configuration
- 70Ah / 70,000mAh capacity
- 48V-class lithium-ion battery
- 182 cells total
- NMC / Hi-Ni lithium-ion chemistry
- 3C maximum cell discharge rate
- High energy capacity
- Rechargeable battery design
- Suitable for EV and mobility applications
- Requires a compatible 13S Li-ion BMS
- Full-charge voltage: 54.6V
BAK’s datasheet specifies the N21700CG-50 at 3.6V nominal, 5.0Ah typical capacity, 4.2V charging voltage, 1C maximum charging current and 3C maximum discharge current.
Capacity Calculation
Each cell provides approximately 5Ah.
5Ah × 14P = 70Ah
Total cells:
13S × 14P = 182 cells
Approximate nominal energy:
46.8V × 70Ah = 3,276Wh
Therefore, the battery provides approximately 3.28kWh nominal energy.
Voltage Information
- Nominal voltage: 46.8V
- Marketed voltage class: 48V
- Full-charge voltage: 54.6V
- Series configuration: 13S
- Parallel configuration: 14P
- Cell voltage: 3.6V nominal / 4.2V maximum
The 48V designation is the common system-voltage class; using the BAK cell’s 3.6V nominal rating, the calculated nominal pack voltage is 46.8V.
Applications
- 48V electric bicycles
- Electric scooters
- Electric motorcycles
- Electric carts
- EV conversion projects
- Industrial vehicles
- Robotics
- Portable power systems
- Solar energy storage
- High-capacity backup systems
- Custom EV battery packs
- Industrial battery systems
BMS & Charging
A suitable 13S Li-ion BMS should be installed to provide protection and monitoring for the 13 series cell groups.
For charging, use a dedicated 54.6V CC/CV lithium-ion charger designed for a 13S NMC/Li-ion battery pack.
Important Safety Note
This is a high-energy 3.28kWh lithium-ion battery pack. Proper cell matching, BMS protection, insulation, interconnections, wiring, enclosure and compatible charging equipment are essential for safe operation. Battery assembly and servicing should be performed by a qualified battery-pack technician.
