top of page

72v 12ah Samsung 40T Lithium-ion E-Bike Battery

Bicycle Motor Works

  • ⚡ 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)

    Feature8 Ah Model12 Ah Model
    Voltage / Configuration72 V (20S 2P)72 V (20S 3P)
    Cell TypeSamsung 21700 40T 4000 mAh 30 ASamsung 21700 40T 4000 mAh 30 A
    Capacity8 Ah12 Ah
    Energy (Wh)720 Wh864 Wh
    Continuous Rating / BMS80 A cont., 120 A burst BMS90 A cont., 120 A burst BMS
    Cell Discharge Rating60 A continuous (2P)90 A continuous (3P)
    Wiring10 AWG silicone output leads10 AWG silicone output leads
    ConnectorsXT-90S output / XT-60 charge portXT-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.

  • Buy Now
bottom of page