⚡ 52V Premium eBike Battery – Featuring the Advanced Ampace JP40 21700 Cells
Available in 8Ah, 12Ah, or 16Ah Models | Made in the USA | High-Current | Cold-Weather Ready
 
🔋 The Next Generation of High-Performance eBike Batteries
Experience next-level power and reliability with the 52V Ampace JP40 eBike Battery, custom-built by Bicycle Motor Works in Bethlehem, Pennsylvania.
As a family-owned manufacturer since 2014, we handcraft each pack using only premium, Grade-A cells — ensuring superior performance, safety, and durability.
Powered by the Ampace JP40 21700 cell, the most advanced lithium-ion technology on the market, this pack delivers exceptional discharge rates, cold-weather endurance, and ultra-efficient thermal control for the most demanding eBike setups.
 
 
💥 Ampace JP40 – The Cell That Redefines High-Current Performance
The Ampace JP40 is the new benchmark for high-current 21700 lithium-ion cells, outperforming industry favorites like Molicel P42A, P45B, and P50B in every measurable way.
 
They are superior in high-current applications in several ways:
⚡ Highest-performing 21700 cell by discharge rate
❄️ Exceptional cold-weather performance – No loss of capacity down to -20°C (-4°F)
🔩 Tabless “all-tab” design – Delivers up to 140A peak current (5-second bursts per cell)
🔥 Outperforms Molicel P42A, P45B, and P50B in energy delivery and heat control
🧪 Proven durability – Survived 100-cycle stress tests (30A continuous / 5A charge) with only 2% capacity loss
 
These cells are purpose-built for extreme eBike power, offering reliable high output, efficient cooling, and consistent performance — even under heavy throttle or steep climbs.
 
⚙️ Choose Your Power Level
Model
Capacity
Energy (Wh)
Cell Type
BMS Rating
Dimensions (inches)
Approx. Weight
8Ah Pack
416Wh
Ampace JP40 21700
60A continuous / 100A max
6 × 4 × 3
4.8 lbs
 
12Ah Pack
624Wh
Ampace JP40 21700
80A continuous / 120A max
12 × 3.3 × 3
6.2 lbs
 
16Ah Pack
832Wh
Ampace JP40 21700
80A continuous / 120A max
12 × 4.25 × 3
7.0 lbs
 
 
Each pack includes:
10AWG silicone output wiring
XT-90S anti-spark discharge connector
XT-60 heavy-duty charge connector
Temperature-protected BMS
Double shrink-wrapped rubber armor for impact protection
 
 
🚴 Performance Highlights
✅ 52V = More Power on Any 48V System – Plug-and-play upgrade for more torque & range
⚙️ Handles 80A+ Continuous Output – Ideal for CYC X1, BBSHD Ludicrous, and BAC ASI setups
💨 High Efficiency & Low Resistance – Custom copper/nickel busbars for smooth current flow
🧊 Superior Heat Dissipation – Tight internal structure prevents trapped heat
💪 Compact, Rugged Design – Tough rubber exterior for vibration and water resistance
🔋 Long Cycle Life – Up to 1000 charge cycles with consistent performance
 
This pack is engineered to deliver more torque, throttle response, and sustained power, even under heavy load — with minimal heat buildup for long-lasting reliability.
 
 
🧠 Built with Care. Tested for Excellence.
Every Bicycle Motor Works battery is hand-assembled, spot-welded, and tested for voltage, balance, and resistance.
Each unit includes:
Precision cell-matching and balancing
Solid nickel and copper connections for efficient current delivery
80A continuous BMS with integrated temperature protection
Smart balancing circuit for extended cell life and performance consistency
Our compact frame design improves heat transfer and safety by minimizing internal air gaps — ensuring every ride stays cool and reliable.
 
⚠️ Safety Guidelines
Lithium-ion batteries are powerful devices and must be handled responsibly.
Please follow these precautions:
Use only the correct lithium-ion charger
Never short, puncture, or modify the pack
Do not charge unattended or near flammable materials
Avoid use if wet, swollen, or physically damaged
Charge in a fireproof or metal container
Read our eBike Battery 101 Guide for detailed safety and care tips
Improper use can result in injury or damage — if in doubt, consult a professional.
 
🚚 Shipping Information
Built to order and shipped in sequence
Typical lead time: 5–10 business days
Tracking provided upon shipment
Ships from Bethlehem, Pennsylvania
U.S.-based support available for all customers
 
🏆 Why Riders Choose Bicycle Motor Works
🇺🇸 Proudly Built in the USA since 2014
👨‍🔧 Family-Owned, Quality-Focused Craftsmanship
🔋 Premium Certified 21700 Cells Only – Never Rewrapped
⚙️ High-Performance Engineering for Real Riders
🧰 Trusted Nationwide by Builders & Enthusiasts
 
Bicycle Motor Works – Premium American-Made eBike Batteries. Engineered for Power. Built to Last.