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.