⚡ 72V Premium eBike Battery – Featuring Advanced Ampace JP40 21700 Cells
Available in 8Ah or 12Ah | 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.
72v 8-12ah Ampace JP40 Lithium ion E-Bike Battery
Resource Center: Our policies must be read, understood and agreed upon before making a purchase, this includes eBike Batteries 101, Store Policies, Privacy Policy and Terms of Use. All materials can be found in our Resource Center.
Due to the high demand, lead time for all eBike Batteries are 2-3 weeks. We take quality assurance very seriously, and we appreciate your patience.