⚡ Samsung 40T High-Current eBike Battery – Proven Performance Since 2018
72 V Power Pack | Choice of 8 Ah or 12 Ah | 80 A Continuous BMS | USA Made
 
🔋 Overview
Trusted by riders since 2018, our Samsung 40T High-Current eBike Battery has earned its reputation for reliability, durability, and consistent performance.
Hand-built in Bethlehem, PA by Bicycle Motor Works, this pack uses premium Samsung 21700 40T cells and a heavy-duty BMS to deliver smooth, stable power for high-performance e-bikes and mid-drives.
Available in 8 Ah (720 Wh) or 12 Ah (864 Wh) configurations, both packs feature a rugged enclosure, pure copper/nickel connections, and industry-leading thermal control for dependable operation under load.
 
 
⚙️ Technical Specifications (Compare between the 8ah and 12ah)
Feature
8 Ah Model
12 Ah Model
Voltage / Configuration
72 V (20S 2P)
72 V (20S 3P)
Cell Type
Samsung 21700 40T 4000 mAh 30 A
Samsung 21700 40T 4000 mAh 30 A
Capacity
8 Ah
12 Ah
Energy (Wh)
720 Wh
864 Wh
Continuous Rating / BMS
80 A cont., 120 A burst BMS
90 A cont., 120 A burst BMS
Cell Discharge Rating
60 A continuous (2P)
90 A continuous (3P)
Wiring
10 AWG silicone output leads
10 AWG silicone output leads
Connectors
XT-90S output / XT-60 charge port
XT-90S output / XT-60 charge port
Dimensions (approx.)
9 " × 4 " × 3 "
13.75 " × 3.75 " × 3.25 "
Weight
≈ 7 lb
≈ 11.25 lb
 
 
🚀 Key Features
✅ Proven Samsung 40T Cells – The original high-current e-bike standard; trusted by Bicycle Motor Works since 2018.
✅ U.S. Made Quality – Hand-assembled and tested in Bethlehem, PA.
✅ Rugged Construction – Thick rubber outer layer and double shrink wrap for protection.
✅ Thermal Stability – Tight internal build reduces heat buildup for longer cycle life.
✅ High Power Output – Up to 120 A burst current for peak performance and acceleration.
✅ Plug-and-Play Compatibility – Perfect for CYC Motors, BBSHD Ludicrous, and BAC/ASI controllers.
 
 
🧠 Engineering Excellence
Every pack is spot-welded using solid nickel and copper busbars for low resistance and minimal voltage sag.
The tight-frame construction improves heat dissipation and cell longevity – unlike packs with loose internal air space that trap heat like double-pane glass.
A temperature-protected BMS maintains cell balance and prevents over-charge, over-discharge, and thermal runaway.
This pack delivers consistent power output and long-term stability under intense conditions.
 
 
⚠️ Safety Information
Lithium-ion batteries are powerful and must be used responsibly.
Always:
Charge only with an approved lithium-ion charger.
Monitor while charging and store in a safe, dry area.
Handle with care to avoid damage.
Never:
Modify connectors or wiring.
Use if damaged or wet.
Leave charging batteries unattended.
Contact Bicycle Motor Works or a qualified technician if unsure about battery compatibility or charging procedure.
 
🚚 Shipping Information
All e-bike batteries are built to order.
Typical turnaround: 5–10 business days.
Tracking provided upon shipment.
Ships safely within the continental U.S.
 
 
🏆 Why Choose Bicycle Motor Works
🇺🇸 Proudly Made in the USA since 2014
🔋 Authentic Samsung 21700 Cells – never rewrapped or recycled
⚙️ Family-Owned, Quality-Driven Craftsmanship
💪 High-Current Designs for Serious Riders
🔧 Trusted Nationwide by Builders & Professionals
 
Bicycle Motor Works – Premium American Power for Performance Riders.