Overview

Upgrade your e-bike with the Hercules 48V 20Ah UL Certified Lithium-Ion Battery. Built using premium 21700 lithium-ion cells, this high-capacity battery delivers dependable power, extended riding range, and long service life for demanding riders.

Designed for compatibility with Hercules battery systems, this battery is ideal for replacing worn-out batteries or increasing ride time on compatible electric bicycles.

Specifications

Voltage: 48V
Capacity: 20Ah
Energy: 960Wh
Cell Type: Premium 21700 Lithium-Ion Cells
Certification: UL Certified
Battery Management System: Integrated Smart BMS
Charging Voltage: 54.6V
Battery Style: Integrated Downtube Battery
Color: Black
Condition: Brand New

Features

Premium 21700 lithium-ion cells
High-capacity 960Wh battery
UL Certified for safety
Smart Battery Management System
Long cycle life
Excellent power delivery
Lightweight aluminum battery housing
Lockable removable battery
Integrated charge indicator
Weather-resistant construction

Estimated Riding Range

Actual range varies based on rider weight, terrain, assist level, tire pressure, and weather.

Typical range:

Eco Mode: 50–80 miles
Normal Mode: 35–60 miles
High Assist: 25–40 miles

Compatible With

Compatible with bicycles designed for the Hercules integrated battery platform.

If you're unsure whether this battery fits your bike, contact EMP before ordering. We'll verify compatibility using photos of your existing battery and bike.

Included

Hercules 48V 20Ah Battery
Battery Keys
Battery Mounting Hardware (if applicable)
User Documentation

Charger sold separately unless otherwise stated.

Safety Features

Overcharge Protection
Over-discharge Protection
Short Circuit Protection
Overcurrent Protection
Temperature Protection
Cell Balancing Technology

Why Buy From EMP?

U.S. Based Support
Fast Shipping
Battery Compatibility Assistance
Professional Customer Service
Premium Quality Batteries
Expert E-Bike Battery Specialists

Shipping

Ships from the United States
Professionally packaged
Hazmat compliant shipping
Tracking provided after shipment

Warranty

1-Year Limited Warranty

Warranty covers manufacturing defects under normal use.

Frequently Asked Questions

Will this fit my bike?

This battery is designed for compatible Hercules battery systems. Contact us with photos before ordering if you're unsure.

Does it include a charger?

Unless otherwise specified, the charger is sold separately.

Is this battery UL Certified?

Yes. This battery is UL Certified and built with premium lithium-ion cells.

How long will it last?

Most riders can expect 800–1,000 charge cycles with proper care.

HJM Bike Battery Rebuild Service

Hercules 48V 20Ah Lithium-Ion E-Bike Battery