52V 21Ah Samsung 35E eBike Battery Premium Range • Long Life • Built in the USA by Bicycle Motor Works If you want exceptional range, reliability, and long-lasting performance, the Bicycle Motor Works 52V 21Ah Samsung 35E Battery is the perfect upgrade. Each pack is custom-built in Bethlehem, PA, made with genuine Samsung cells, precision craftsmanship, and rugged protective sealing—designed for riders who value both endurance and safety. This battery is engineered to deliver excellent mileage, stable power output, and a smooth, efficient ride, making it ideal for touring, commuting, cargo eBikes, or any setup where range matters most. ⭐ Key Benefits - Superior Range & Runtime With 21Ah and 1,092Wh of usable energy, this pack provides significantly longer rides between charges. - High-Quality Samsung 35E Cells Known for reliability, balance, and excellent energy density—perfect for long-distance riders. - Built in the USA – Safely Sealed & Secured Every pack is handcrafted with premium materials, reinforced casing, and full quality inspection. - Full Customer Support Need help choosing? Installing? Charging? We’re here for you. Technical Specifications - Voltage: 52V - Capacity: 21Ah - Energy: 1,092Wh - Cell Type: 84 Genuine Samsung 35E (18650, 3500mAh) - Configuration: 14s6p - BMS: 35A continuous / 70A max • Temperature protected - Discharge Connector: XT-90S anti-spark - Charge Connector: Heavy-duty XT-60 - Wiring: 10AWG silicone leads - Weight: Approx. 8 lbs - Dimensions: ~10.5" × 3" × 5" - Encasement: Shock-resistant rigid casing + double-layer shrink + thick rubber armor Engineered for Real-World Riding This battery is excellent for: - Long-distance commuting - Touring and trail adventures - Cargo hauling - Riders needing maximum mileage per charge - Most 48V systems seeking better performance with 52V compatibility Why 52V? - Runs cooler & more efficiently - Increases torque and responsiveness - Works with most 48V motors & controllers - Provides more power AND more range —a win-win Built for Durability & Heat Management - Compact shape fits tight frames or backpacks - Tight internal cell structure improves heat dissipation - Empty air pockets avoided (air gaps insulate heat) - Solid nickel strips, precision spot-welded - Each cell and series tested before assembly - BMS manages charging, balancing, and protection automatically Your pack stays stable, efficient, and safe—even under demanding use Safety & Usage Warnings Lithium-ion batteries are powerful devices and must be treated responsibly. - Charge ONLY with the proper lithium-ion charger. - Never leave a charging battery unattended. - Charge in a fire-safe location (grill, ammo box, metal container, etc.). - Do NOT open, modify, cut wires, or alter connectors. - If the battery is damaged or gets wet, discontinue use immediately. - Mishandling can result in fire, injury, or property damage. If you are unsure about compatibility or charging, please contact us first. Shipping Information All Bicycle Motor Works batteries are built in small batches. Orders ship in 2–10 days, in the order they are received. Tracking will be emailed once your pack ships. Reach out anytime for assistance.