Varstrom x Hailong High-Capacity Downtube E-Bike Lithium Battery Pack – 36V / 48V / 52V (Up to 30Ah / 1440Wh) with Genuine Samsung, LG & EVE 21700 Cells, 40A BMS & Fast Charger (US Stock)

Power your high-output electric bicycle build with absolute confidence and eliminate range anxiety for good. The Varstrom x Hailong Downtube E-Bike Battery Series is the ultimate high-voltage power solution engineered for serious commuters, conversion builders, and high-wattage e-bike enthusiasts. Equipped with top-tier, genuine Samsung, LG, and EVE 21700 / Grade-A 18650 lithium cells, these heavy-duty packs deliver massive continuous discharge rates to drive powerful mid-drive and hub motor conversion systems ranging from 250W all the way to 2000W.

Featuring continuous 30A to 40A Battery Management Systems (BMS), integrated mechanical key locks, clear LED capacity readouts, and heavy-duty XT60 output connectors, this turnkey battery series drops cleanly onto your frame’s water bottle bosses for a low-center-of-gravity, factory-finished look. Shipped directly from our United States warehouse, enjoy 1–7-day delivery with zero customs delay!

🚀 Key High-Performance Features

• Premium Tier-1 Cell Architectures: Built exclusively with genuine high-energy density Samsung 50E, LG M50LT, EVE 50E 21700, and Grade-A 18650 cells for zero voltage sag under load and 1000+ lifecycle longevity.

• Universal Motor & Conversion Kit Match: Fully optimized for Bafang (BBS01B, BBS02B, BBSHD), Tongsheng (TSDZ2B, TSDZ8, TSDZ16), and hub motor systems from 250W to 2000W output.

• Heavy-Duty 40A BMS Multi-Layer Protection: Advanced internal circuitry continuously guards against over-current, over-voltage, cell imbalance, deep discharge, short circuits, and extreme thermal spikes (-15°C to 65°C discharge range).

• Secure Theft-Deterrent Key Lock Baseplate: Mounts securely to your down-tube water bottle bosses with an integrated anti-theft key lock for quick removal when charging indoors.

• Convenient User Interface: Includes a waterproof 3-pin/XLR charging port, a physical power switch to prevent drain during storage, and an on-demand LED battery fuel gauge.

• Fast US Dispatch & 1-Year Warranty: Dispatched directly from US regional fulfillment centers within 1–7 days, backed by a 1-Year Manufacturer Warranty and local service support.

📊 Comprehensive Battery Pack Configuration Matrix

Review the full cell specification matrix below to select the exact voltage, capacity, and cell chemistry for your motor setup:

⚙️ Operating Instructions & Battery Care Guidelines

To maximize the life and range performance of your lithium power pack:

1. Initial Balance Charge: Fully charge your battery upon arrival using the supplied automatic CC/CV charger until the LED indicator turns solid green before your first ride.

2. Motor Pairing & Discharge: Standard output is fitted with an XT60 female connector. Verify that your controller’s max amp draw matches or is below the battery’s BMS continuous rating (30A or 40A).

3. Storage Protocols: If storing your battery for over 30 days during winter months, keep the charge level at roughly 50%–60% in a dry environment between 0°C and 25°C. Never store a lithium pack fully depleted.

📦 What's Inside the Box?

• 1 x Varstrom x Hailong / Yingwu Lithium-Ion Downtube Battery Pack (Selected Configuration)

• 1 x Down-Tube Mounting Baseplate Rail with Hardware

• 2 x Anti-Theft Lock Base Keys

• 1 x Automatic CC/CV Lithium Smart Charger (2A, 3A, or 4A depending on model)

• 1 x XT60 Connection Cable Lead & User Technical Manual

Power your e-bike conversion with genuine Samsung, LG, and EVE cell technology. Select your voltage, capacity, and cell variant below, click Add to Cart, and enjoy fast US shipping!

2026 NEW Yingwu 25Ah Battery & Hailong 30Ah Battery

BatteryPackingList📝:

1 pc Battery (Optional)

1 pc Battery Charger

1 pc Battery Manual

1 pc XT60 Port Motor Battery Connector Cable

1 set of Screws

2 pcs Battery Keys

Global Warehouse & Service Commitment

Our Commitment to You

🔹 Delivered Duty Paid(DDP)Assurance

For customers in the following countries, all taxes and import duties are pre-paid by us, ensuring a hassle-free delivery experience:

France, Spain, Netherlands, Italy, Bulgaria, Belgium, Latvia, Poland, Denmark, Finland, Portugal, Sweden, Slovakia, Slovenia, Greece, Hungary, Czech Republic, Lithuania, Luxembourg, Romania, Ireland, Estonia, Croatia.

🔹 Rapid, ReliableDelivery

Your order will be dispatched from our nearestEU or UKwarehouse for lightning-fast transit. Most deliveries arrive within2–7business days (excluding remote regions).

Note:For logistical reasons, we currently cannot deliver to island addresses. If your location is on an island, kindly provide an alternative mainland address during checkout.

🔹 ComprehensiveWarranty& Support

 Motor & Battery:12months quality warranty for motor and battery

 Accessories & Parts:30-daywarranty for quality assurance.

Local Expertise:Our network of certified service centers across the EU and UK ensures prompt repairs and support.