72V 8ah Premium eBike Battery – Featuring Advanced Ampace JP40 21700 Cells Built in the USA | High-Current | Cold-Weather Ready Premium U.S.-Made eBike Power Upgrade your ride with the 72V Ampace JP40 eBike Battery, custom-built in Bethlehem, Pennsylvania by Bicycle Motor Works, a family-owned manufacturer trusted since 2014. Every pack is hand-assembled in the U.S. using premium certified 21700 cells, advanced materials, and high-current BMS protection for riders who demand both power and reliability. This is not an imported, mass-produced battery — it’s a precision-built American pack engineered to perform under the most demanding riding conditions. The Ampace JP40 – The Most Advanced 21700 Cell in the World The Ampace JP40 represents the next generation of lithium-ion cell technology, outperforming industry-leading models like Molicel P42A, P45B, and P50B in both energy delivery and thermal stability. Why Riders Love the Ampace JP40: - Highest performing 21700 cell by discharge rate - Cold-weather champion – no capacity loss down to -20°C (-4°F) - Tabless (all-tab) design – peak current of 140 amps for 5-second bursts per cell - Superior energy and heat management compared to Molicel P42A, P45B, and P50B - Extreme reliability – 100 stress-test cycles at 30A continuous with only 2% capacity loss These cells are purpose-built for high-current eBike applications, offering unmatched torque, consistent voltage, and excellent longevity. Battery Options Choose the configuration that matches your ride and power demands: Model | Voltage | Capacity | Configuration | Energy (Wh) | BMS Rating | Dimensions | Weight 72V 8Ah Pack | 72V | 8Ah | 20S2P – Ampace JP40 21700 Cells | 576Wh | 80A Continuous / 120A Max | 9” × 4” × 3” | ~7 lbs 72V 12Ah Pack | 72V | 12Ah | 20S3P – Ampace JP40 21700 Cells | 864Wh | 80A Continuous / 120A Max | 13.75” × 3.75” × 3.25” | ~11.25 lbs Performance Highlights - 72V High Voltage System – Delivers superior torque and top-end performance - High-Current Capability – Up to 80A continuous / 120A burst - Optimized for CYC X1, BBSHD Ludicrous, and BAC ASI setups - Enhanced Heat Dissipation – Compact internal structure prevents trapped heat - Low Resistance Connections – Solid nickel and copper busbars for maximum efficiency - Cold-Weather Ready – Performs flawlessly down to -20°C (-4°F) - Smart BMS Protection – Balances cells and prevents overcharge/discharge Our tight-frame construction improves heat transfer and prevents energy loss, unlike imported packs that trap heat with excess air space. This means cooler operation, longer lifespan, and consistent high-current output. Construction Details Every Bicycle Motor Works pack is meticulously designed for efficiency, durability, and safety. Features Include: - Tough, rigid casing with thick dual shrink wrap and rubberized armor layer - Heavy-duty XT-90S output connectors with spark suppression - XT-60 charge connector for reliable recharging - Temperature-protected 80A BMS with active balancing - 10AWG high-current silicone wiring for secure and efficient power delivery Each cell and circuit is individually tested for voltage, resistance, and balance prior to assembly. Safety Guidelines Lithium-ion batteries are powerful energy devices and must be handled carefully. Please follow these precautions: - Charge only with the proper lithium-ion charger - Never short-circuit, puncture, or modify the battery - Do not use if wet or damaged - Never leave charging batteries unattended - Charge in a fireproof or metal container - If unsure, consult a professional before use Improper handling may lead to damage, fire, or personal injury. Shipping & Lead Time - All eBike batteries are built to order in the order received - Typical lead time: 6–10 business days - Tracking provided upon shipment - Ships from Bethlehem, Pennsylvania - U.S.-based support for all customer inquiries Why Choose Bicycle Motor Works - Proudly U.S.-Made Since 2014 - Family-Owned & Operated - Premium Certified Ampace JP40 21700 Cells – No recycled or rewrapped cells - High-Performance, Safety-Focused Design - Trusted by eBike Builders, Riders, and Professionals Nationwide Bicycle Motor Works – Premium American-Made eBike Batteries. Engineered for Power. Built to Last.