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48V 20AH Battery | Samsung 21700 50G Cells | Smart BMS Protection | 5A Fast Charger

$444.99

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Genuine Samsung Cells : Our 48V 20Ah lithium battery uses authentic Samsung 21700 50G cells in 13S4P configuration, delivering exceptional range and power for e-bikes and scooters.
Smart Bluetooth Monitoring & Control : Monitor battery health in real-time via smartphone app. Our intelligent BMS provides voltage, capacity, and temperature monitoring for your 48V lithium battery.
Compact & Lightweight Design : Only 3.8kg (8.4 lbs) and measuring 295×115×75mm (11.6×4.5×3 in), this 20Ah battery offers the perfect balance of capacity and portability for electric mobility.
Smart Fast Charging : Complete package with 54.6V 5A smart charger. Reach 80% charge in just 3 hours with universal 100-240V input compatibility.
Professional Safety & Durability : Built with vibration-resistant frame, temperature protection, and 500+ charge cycles. Operates reliably from -20°C to 60°C for long-lasting performance.

BMS Discharge Current (Select Motor Power)

30A | For 500W - 750W Motors

40A | For 750W - 1200W Motors

Discharge Plug

Anderson 50A

XT90F/M

XT60F/M

QS8 plug

Wire only

BMS Discharge Current (Select Motor Power)

30A | For 500W - 750W Motors 40A | For 750W - 1200W Motors

Discharge Plug

Anderson 50A XT90F/M XT60F/M QS8 plug Wire only

Quantity

Free Shipping

30 Day Return

100% Secure Payment

Fast Delivery

24-Hour Prompt Response

1 Years Warranty

Secure Payment

•Upgrade your e-bike or scooter with confidence. This professional 48V 20Ah lithium battery is engineered for reliability and smart control.

•Built with Genuine Samsung 21700 50G Cells (13S4P): We use 52 authentic, high-performance cells for superior range, power, and long-term durability.

•Smart Bluetooth BMS & App: Monitor battery health in real-time. Check voltage, remaining capacity, and temperature from your phone. Enjoy peace of mind with built-in protection and remote control features.

•Complete & Ready to Ride: Includes a fast 54.6V 5A Smart Charger. The cells are securely assembled in a rigid frame and protected by a tough PVC wrap.

•Ideal for electric bike conversions, powering scooters, and various DIY mobility projects requiring a dependable, high-capacity 48V battery.

•Get the combination of premium Samsung battery technology and intelligent monitoring for a smarter, safer ride.

Why Samsung 50G Cells Make a Difference

•Extended Range: 48V 20Ah provides 35-45 miles* per charge for typical e-bike use.

•Built to Last: 500+ charge cycles - that's 2-3 years of regular use with proper care.

•Safe & Reliable: Genuine Samsung cells with built-in safety protection. No cheap knockoffs here.

•All-Weather Ready: Works perfectly from -10°C to 60°C. Great for summer rides and winter commutes.

•Better Performance: Consistent power for hills and acceleration. No frustrating slowdowns.

* Range varies based on rider weight, terrain, assist level, and weather conditions. Actual range may differ.

Smart Bluetooth BMS: Your Battery's Brain & Guardian

•Real-Time Monitoring: Check battery status anytime on your phone - voltage, capacity %, temperature, and cycle count.

•Charge Optimization: Smart charging algorithms extend battery life by preventing overcharge and balancing cells.

•Safety Protection: Automatic shutdown for over-voltage, over-current, short-circuit, and temperature extremes.

•Range Prediction: See estimated remaining miles based on your riding patterns and battery health.

•Diagnostics & Alerts: Get warnings for abnormal conditions and maintenance reminders before issues occur.

•Easy App Control: Simple iOS/Android app with intuitive interface - no technical knowledge needed.

Choose Your BMS Version: 30A or 40A Continuous Discharge

Our batteries come with two BMS options. The continuous discharge current determines what motor power your battery can safely support:

🔋 30A BMS Version

Recommended for: 500W - 750W motors

Power Output: 48V × 30A = 1,440W peak power

Ideal For: Standard e-bikes, city commuters, flat terrain riders

Perfect for daily commuting and casual riding where extreme power isn't needed.

⚡ 40A BMS Version

Recommended for: 750W - 1,200W motors

Power Output: 48V × 40A = 1,920W peak power

Ideal For: High-performance e-bikes, cargo bikes, steep hills, off-road riding

Choose this for demanding conditions where extra power and headroom are essential.

📋 How to Choose:

Check your motor's wattage rating (usually printed on the motor)
Consider your typical terrain - hills need more power
Factor in your weight plus any cargo you carry
When in doubt, choose the 40A version for future-proofing

Note: Both versions include all the smart Bluetooth features above. The only difference is the maximum continuous discharge current.

Professional Cell Mounting System

Our 48V 20Ah battery features a precision-engineered frame that securely holds each Samsung 50G cell in place. This rigid structure provides essential protection against vibration, impacts, and physical stress during rides.

The individual cell compartments maintain proper spacing for optimal heat dissipation and prevent cell-to-cell contact. This design ensures long-term structural integrity and minimizes the risk of damage from expansion or movement.

By using a professional frame instead of simple tape wrapping, we deliver enhanced safety, extended battery lifespan, and consistent performance—key factors that distinguish premium e-bike batteries from basic alternatives.

54.6V 5A Smart Fast Charger

Included with your 48V 20Ah Battery

•Fast Charging: 5A output for 4-5 hour charge time

•Smart Protection: Auto-stop with multiple safety features

•3-Stage Charging: Optimizes battery health and lifespan

•Global Use: 100-240V AC for worldwide compatibility

•Certified Safe: CE, FCC, RoHS compliant

54.6V

Output Voltage

Charging Current

4-5h

Charge Time

Ready to Use: Complete package, just plug in and ride

Choose Your Power: 30A vs 40A BMS Performance Guide

Select the right BMS version based on your motor power and riding needs. Both options deliver the same 20Ah capacity with different performance characteristics.

30A BMS Version

Recommended For:

500W - 750W Motors

City commuters & daily riders
Mostly flat terrain
Casual recreational use
Budget-conscious buyers

Estimated Range*

30-40 miles

(50-65 km)

Peak Power Output

1,440W

(48V × 30A)

40A BMS Version

Recommended For:

750W - 1,200W Motors

High-performance e-bikes
Hilly terrain & off-road
Cargo bikes & heavy loads
Speed enthusiasts

Estimated Range*

25-35 miles

(40-55 km)

Peak Power Output

1,920W

(48V × 40A)

Quick Comparison: Which One Fits You?

Feature	30A BMS	40A BMS
Best Motor Match	500-750W	750-1200W
Typical Speed	20-25 mph	25-30+ mph
Hill Performance	Moderate hills	Steep hills
Estimated Range	30-40 miles	25-35 miles
Best For	Commuting	Performance

🔋 Range Estimation Factors

Rider weight & cargo: Heavier loads reduce range
Terrain: Hills consume more energy
Assist level: Higher assist = shorter range
Weather: Cold reduces efficiency
Riding style: Aggressive acceleration uses more power

* Range estimates based on average riding conditions. Actual range will vary based on factors listed above.
Pro Tip: Check your motor controller's maximum current rating before selecting BMS version.

48V 20Ah Lithium-ion Battery - Technical Specifications

Basic Parameters

Parameter	Specification
Battery Model	48V 20AH 960Wh
Battery Type	Lithium-ion rechargeable battery
Production Process	13S4P (65 cells total)
Standard Voltage	48V DC
Battery Capacity	20Ah (960Wh)
Dimensions (L×W×H)	Approx. 295 × 115 × 75 mm (11.6 × 4.5 × 3.0 in)
Weight	Approx. 3.8 kg (8.4 lbs)

Cell Parameters (Samsung INR21700-50G)

Parameter	Specification
Cell Brand & Model	Samsung INR21700-50G
Cell Type	Lithium-ion rechargeable battery
Nominal Voltage	3.6V ~ 3.7V
Nominal Capacity	5000mAh (5.0Ah)
Max Continuous Discharge	5A (Continuous) / 9.8A (Peak)
Charge Cut-off Voltage	4.20V ± 0.05V (CCCV, 100mA cut-off)
Discharge Cut-off Voltage	2.5V ± 0.1V

BMS Specifications

Parameter	Specification
BMS Brand Options	JBD / ANT / JK
Selection Criteria	Discharge current, battery dimensions, customer requirements
Installation	Built into battery pack
Communication	Bluetooth & WiFi enabled
Compatibility	iOS & Android systems
Main Functions	Real-time monitoring, remote control
Optional Extensions	CAN BUS / RS485 / GPS (Customizable)

Battery Pack Performance

Charge Cut-off Voltage	54.6V (Full charge)
Discharge Cut-off Voltage	32.5V (Auto protection)
Rated Discharge Current	Based on motor power
Continuous Discharge	Determined by BMS rating
Peak Discharge Current	Motor power & BMS peak capacity

Charger Specifications

Input Voltage	100-240V AC (Universal)
Output Current	5A (Standard) / 10A (Optional)
Charging Method	Constant Current & Voltage (CC/CV)
Charging Time	80% in 3h / Full in 4-5h
Plug Options	US / EU / UK / AU standards

Temperature Specifications

Operating Condition	Temperature Range	Notes
Battery Charging	0°C to 60°C	Recommended < 45°C
Battery Discharging	-20°C to 60°C	Must maintain < 60°C
Charger Operation	0°C to 60°C	Recommended < 45°C

⚠️ Important Notes & Recommendations

State of Charge (SOC)

Optimal Storage: 40-60% SOC (3.7-3.8V per cell)
Avoid: Long-term storage at <10% or 100% SOC
Aging Acceleration: Extreme SOC levels reduce lifespan

Temperature Control

Ideal: 15-25°C (<2% annual degradation)
Permissible: -20°C to 45°C (requires SOC control)
Prohibited: >50°C or <-30°C (hazard risk)

Maintenance Recommendations

Physical Protection: Avoid compression/impact, keep away from metal objects

Long-term Storage (>1 month): Perform periodic brief charge/discharge cycles

Recommended Cycle: Shallow cycle (30%→80%) every 3 months to maintain lithium-ion activity

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48V 20AH Battery | Samsung 21700 50G Cells | Smart BMS Protection | 5A Fast Charger

Premium 48V 20Ah E-Bike Battery with Bluetooth Monitoring | Samsung 50G Cells

48V 20Ah E-Bike Battery | Bluetooth Monitoring | Samsung 50G

Professional-Grade Lithium Battery for Enhanced E-Bike and Scooter Performance