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Home / Products / 72V 40Ah Triangle eBike Battery | Samsung 21700 50S Cells
BOOANT 72V 40Ah triangle lithium eBike battery pack built with Samsung 50S cells shown with custom triangle frame mounting bag
BOOANT 72V 40Ah triangle lithium battery product size diagram (375x250x330mm / 14.76x9.84x12.99in) and 11.5kg (25.35 lbs) net weight
BOOANT 72V 40Ah triangle lithium battery pack side profile view showing durable blue PVC enclosure and silicone discharge leads
BOOANT 72V 40Ah triangle lithium battery pack back view displaying yellow safety warning label and silicone wiring connectors
BOOANT 84V 10A smart fast charger for 72V lithium battery with aluminum alloy casing, active cooling fan, and XT60 output plug
BOOANT 72V 40Ah triangle lithium battery pack connected with 84V 10A aluminum fast charger via XT60 charging port for eBike setup
BOOANT 72V 40Ah triangle lithium battery package contents including fast charger, custom frame bag, and discharge extension cable
BOOANT 72V 40Ah triangle lithium eBike battery pack built with Samsung 50S cells shown with custom triangle frame mounting bag
BOOANT 72V 40Ah triangle lithium battery product size diagram (375x250x330mm / 14.76x9.84x12.99in) and 11.5kg (25.35 lbs) net weight
BOOANT 72V 40Ah triangle lithium battery pack side profile view showing durable blue PVC enclosure and silicone discharge leads
BOOANT 72V 40Ah triangle lithium battery pack back view displaying yellow safety warning label and silicone wiring connectors
BOOANT 84V 10A smart fast charger for 72V lithium battery with aluminum alloy casing, active cooling fan, and XT60 output plug
BOOANT 72V 40Ah triangle lithium battery pack connected with 84V 10A aluminum fast charger via XT60 charging port for eBike setup
BOOANT 72V 40Ah triangle lithium battery package contents including fast charger, custom frame bag, and discharge extension cable
BOOANT 72V 40Ah triangle lithium eBike battery pack built with Samsung 50S cells shown with custom triangle frame mounting bag
BOOANT 72V 40Ah triangle lithium battery product size diagram (375x250x330mm / 14.76x9.84x12.99in) and 11.5kg (25.35 lbs) net weight
BOOANT 72V 40Ah triangle lithium battery pack side profile view showing durable blue PVC enclosure and silicone discharge leads
BOOANT 72V 40Ah triangle lithium battery pack back view displaying yellow safety warning label and silicone wiring connectors
BOOANT 84V 10A smart fast charger for 72V lithium battery with aluminum alloy casing, active cooling fan, and XT60 output plug
BOOANT 72V 40Ah triangle lithium battery pack connected with 84V 10A aluminum fast charger via XT60 charging port for eBike setup
BOOANT 72V 40Ah triangle lithium battery package contents including fast charger, custom frame bag, and discharge extension cable
BOOANT 72V 40Ah triangle lithium eBike battery pack built with Samsung 50S cells shown with custom triangle frame mounting bag
BOOANT 72V 40Ah triangle lithium battery product size diagram (375x250x330mm / 14.76x9.84x12.99in) and 11.5kg (25.35 lbs) net weight
BOOANT 72V 40Ah triangle lithium battery pack side profile view showing durable blue PVC enclosure and silicone discharge leads
BOOANT 72V 40Ah triangle lithium battery pack back view displaying yellow safety warning label and silicone wiring connectors
BOOANT 84V 10A smart fast charger for 72V lithium battery with aluminum alloy casing, active cooling fan, and XT60 output plug
BOOANT 72V 40Ah triangle lithium battery pack connected with 84V 10A aluminum fast charger via XT60 charging port for eBike setup
BOOANT 72V 40Ah triangle lithium battery package contents including fast charger, custom frame bag, and discharge extension cable

72V 40Ah Triangle eBike Battery | Samsung 21700 50S Cells

$1,569.99

Free Shipping + Duties Included
Built Fresh To Order
2-Year Full Warranty
  • Samsung 50S 20S8P Cells : 160 genuine 21700 cells packing 72V 40Ah (2,880Wh). Eliminates voltage sag under full throttle and heavy hill climbs.
  • JBD Smart Bluetooth BMS : Live cell monitoring and remote switch via phone app. Available in 100A, 150A, and 200A ratings for 6,000W to 12,000W eBike motors.
  • 84V 10A Fast Charger : Aluminum smart charger fills the 40Ah triangle pack in just 4–5 hours at a safe 0.25C rate without degrading cell life.
  • Anti-Spark Plug Options : Pre-soldered QS10, QS8, or Anderson connectors with silicone wire. Pure plug-and-play matching your eBike motor controller.
  • Built-To-Order & 2-Year Warranty : Freshly assembled from factory-direct cells, fully bench-tested before shipping, with all import taxes and 2-year warranty included.
Motor Power & BMS
Up to 6000W / 100A BMS
Up to 9000W / 150A BMS
Up to 12000W / 200A BMS
Discharge Connector
QS10 plug
QS8 plug
Anderson
Wire only
Motor Power & BMS
Discharge Connector
🎬
BOOANT Power In Action Watch real tests, setups & riding videos

72V 40Ah Triangle Lithium Battery Pack

Engineered for high-power frame-mount builds. Packed with 160 genuine Samsung 50S cells in a 20S8P setup, this triangle pack holds rock-solid voltage under heavy throttle and gives you live telemetry on your phone.

72V
High Power 20S
Zero Voltage Sag
2.88kWh
40Ah Capacity
True Long-Range Pack
160Cells
Samsung 50S
20S8P High-Drain Array
10A
Fast Smart Charger
4-5 Hours Full Charge
Authentic Samsung 21700 50S Cells

160 genuine high-drain cells in a 20S8P array. Sustains hard full-throttle launches with zero voltage sag.

FR4 Epoxy & Top-Sealed Protection

Internal fiberglass plates stop vibration shorts. Outer PVC wrap with a top waterproof seal blocks frame spray.

JBD Smart BMS with Bluetooth

Track real-time cell voltages and pack temps on your phone. Toggle charge and discharge ports with one tap.

84V 10A Fast Smart Charger

Takes this 40Ah pack from empty to 100% in roughly 4 to 5 hours. Safe 0.25C rate protects overall cycle life.

Technical Specifications

Verified parameters for triangle frame-mount battery pack
Power & Battery Core
Voltage & Range
72V Nominal Working Range: 60.0V (Cut-off) – 84.0V (Full)
Capacity & Energy
40Ah / 2,880Wh (2.88 kWh) High-rate continuous power reserve
Cells & Array
160× Authentic Samsung 21700 50S 20S 8P High-Drain Configuration
Hardware & Charging
Smart BMS & Control
JBD Smart BMS with Bluetooth iOS & Android Telemetry (Voltages, Temps & Port Control)
Fast Charger System
84.0V 10A Smart Charger Included Full recharge in ~4–5 Hours (0.25C Rate)
Internal & Outer Build
FR4 Epoxy Fiberglass + Outer PVC Wrap Anti-short insulation with top waterproof sealant
Dimensions, Temperature & Warranty
Size & Thickness
375 × 250 × 330 × 95 mm (14.76" × 9.84" × 12.99" × 3.74") Thickness: 80–90 mm (3.15"–3.54")
Pack Weight
~11.5 kg (~25.35 lbs)
Operating Temps
Discharge: -20°C to 60°C (-4°F to 140°F) Charge: 0°C to 45°C (32°F to 113°F)
Warranty Support
2-Year Limited Warranty Direct manufacturer technical backing

*Note: Please measure your inner frame triangle clearance prior to order. Allow a 3–5 mm gap for strap mounting and cabling.

Smart BMS & Motor Matching Guide

Select the right JBD discharge profile tailored to your motor wattage and ride style
Balanced Trail & Street
100AContinuous
300A Instant Peak Discharge
Motor Compatibility
Up to 6,000W Motors
Continuous Output: ~7.2 kW
Peak Power Output: ~21.6 kW
Ride Profile: Cruising & Commuting
Estimated Real-World Range
70 – 100 Miles
~110 – 160 km under moderate 25–35 mph cruising with steady throttle input.
Aggressive High-Power
150AContinuous
450A Instant Peak Discharge
Motor Compatibility
Up to 9,000W Motors
Continuous Output: ~10.8 kW
Peak Power Output: ~32.4 kW
Ride Profile: Hill Climbs & Off-Road
Estimated Real-World Range
50 – 65 Miles
~80 – 105 km during mixed hard throttle pushes and elevated speeds (35–45 mph).
Extreme Track & Drag
200AContinuous
600A Instant Peak Discharge
Motor Compatibility
Up to 12,000W Motors
Continuous Output: ~14.4 kW
Peak Power Output: ~43.2 kW
Ride Profile: Track Racing & Pulls
Estimated Real-World Range
35 – 45 Miles
~55 – 75 km under sustained heavy-amp pulls and track speeds exceeding 50+ mph.
How We Estimate Real-World Range

Estimates are calculated around a 170 lb (77 kg) rider on flat asphalt using 2,880Wh of total capacity with high-drain Samsung 50S cells. Actual mileage will vary based on rider weight, tire width and pressure, headwinds, average cruising speed, and incline grades.

Discharge Connector Options

Choose the matching connector option above to pair with your controller and wiring setup
Option 1
QS10 Plug
240A+ (Anti-Spark)

Ultra-heavy-duty anti-spark connector. Built for high-amp 150A–200A BMS and 9,000W–12,000W race builds with zero spark erosion.

Option 2
QS8 Plug
150A–180A (Anti-Spark)

Gold standard for high-power DIY e-motos. Built-in anti-spark resistor completely eliminates connector popping on 72V plug-in.

Option 3
Anderson
Up to 100A Continuous

Genderless, rugged housing for standard trail and commuter frames. Ideal for fast battery swaps on sub-6,000W controller setups.

Option 4
Wire Only
Custom Bare Leads

Pre-tinned, ultra-flexible heavy-gauge silicone wire. Best choice for DIYers crimping custom terminal lugs or proprietary plugs.

Plug & Play Ready: All connector options come pre-soldered, heat-shrink protected, and pull-tested. Simply select your preferred connector above before adding to cart.

84V 10A Intelligent Fast Charger

High-speed 0.25C recharge (~4-5 hours) with dual-fuse hardware isolation
Chassis & Cooling Aluminum Metal Body + Active Cooling Fan
Dual Hardware Fuses AC Input (250V) + DC Charging (250V/10A)
AC Socket & Plug Detachable C13 Socket (Ships with US/EU/UK plug)
Red Indicator Charging active or safety protect
Green Indicator 100% full (auto-cutoff active)

*Plug DC into battery first, then AC into the wall. Keep cooling vents clear during operation.

Help & Common Questions

FAQ

Clear answers to help you choose the right specs, set up your battery, and ride with confidence.

Which BMS rating (100A, 150A, or 200A) should I choose for my motor?
Match the BMS to your motor controller’s maximum continuous phase amp limit. The 100A BMS is ideal for sub-6,000W setups (such as standard QS205 hub motors or commuter builds). If you run high-amp programmable controllers (like FarDriver, Sabvoton, or Kelly) pushing 7,000W–9,000W, select the 150A BMS. For extreme 10,000W–12,000W drag racing or track builds pulling massive phase currents, pick the 200A BMS (600A peak).
How do I make sure this triangle pack fits inside my bicycle frame?
This pack measures 375 mm (top) × 250 mm (front height) × 330 mm (down tube) × 95 mm (rear angle) with a width of 80–90 mm (3.15"–3.54")[cite: 3]. We recommend cutting a cardboard mockup of these exact dimensions and placing it inside your frame triangle. Ensure you leave at least 5 mm of clearance on each side for mounting straps and cable routing.
Are the Samsung 21700 50S cells genuine Grade-A?
Yes, 100%. Every pack uses authentic Grade-A Samsung INR21700-50S cells sourced directly through authorized factory distributors upon your order. Each individual cell has its original factory QR matrix code intact. We test every cell for capacity and internal resistance matching before assembly to prevent premature pack degradation.
How does the JBD Bluetooth Smart BMS connect to my phone?
Simply download the free Xiaoxiang BMS or Overkill Solar app on iOS or Android. Turn on Bluetooth on your phone, open the app, and select your battery to pair instantly without entering complicated passwords. You will see individual cell voltages (delta mV), live temperature sensor readings, remaining cycle life, and you can switch the charge/discharge ports on or off with a single tap.
Will a 10A fast charger degrade the battery cycle life?
No, it is safe. With 8 cells in parallel (8P) across 160 cells total, a 10A charge current distributes to just 1.25A per cell. Samsung 50S cells are officially rated for standard charging up to 2.5A each. The 10A charger charges at a conservative 0.25C rate, filling the battery from 0 to 100% in roughly 4 to 5 hours while maintaining maximum cell cycle longevity.
Is this battery waterproof against heavy rain, mud, and road spray?
The pack is wrapped in tough industrial PVC heat-shrink with dedicated waterproof sealant applied across the top and cable junctions to repel rainwater run-off and puddles. However, because it is designed for maximum lightweight frame balance, it should not be submerged in deep water or blasted directly with high-pressure power washers. If riding through downpours, a standard water-resistant triangle frame bag provides ideal added defense.
Fulfillment & Quality Assurance

Built-To-Order & Shipping Timeline

To ensure peak chemical life and zero warehouse degradation, every pack is built fresh upon order and undergoes strict quality tests before direct doorstep dispatch.

Stage 01
Fresh Built-To-Order

Assembled on demand using brand-new genuine Samsung cells straight from official channels. No stale warehouse storage, ensuring 100% full cycle life from day one.

Stage 02
Full Bench Cycling Test

Each assembled pack completes an end-to-end charge/discharge cycle. We verify actual amp-hour capacity, cell voltage balance, and BMS cutoffs before box sealing.

Stage 03
Door-To-Door Air & Ground

Inspected through Hong Kong battery customs, then handed to FedEx/UPS (US/CA) or DPD/DHL (EU). Reliable doorstep delivery arrives in 15–20 business days.

Duty-Free Guarantee: All customs clearance fees, import duties, and VAT/taxes are 100% pre-paid by us. No surprise terminal fees upon delivery.