• Black AKJA 72V-20AH lithium-ion battery shown with a black AC power adapter and a black plug, on a white background with text overlays.
  • Black AKJA lead-acid battery with a top handle, shown on a white background with red dimension lines and text indicating measurements of 265mm, 180mm, and 150mm.
  • AKJA 72V20AH-40AH lead-acid battery for two-wheel electric vehicles, shown in a black casing with a blue label, alongside a diagram of eight plug options and text indicating 500W-3000W power.
  • AKJA Pusiien electric scooter battery with a black casing and blue label, shown alongside multiple scooter riders on roads and in traffic, with text indicating 99% electricity usage.
  • A 48V electric vehicle lithium battery pack in black shown next to a white electric scooter, with text overlays describing its powerful output and application for 500W-3000W motor power use.
  • A promotional graphic showing two black vehicle adapter housings from the back, with text at the top stating 'Perfectly Fit Various Small Electric Vehicles' and listing models such as Tailg, Yadea, Aima, Xiaomi, Hello, Xiadao, Xindazhou, Luyyan, Benling, and Xiri.
  • Promotional graphic for high-quality lithium batteries featuring a close-up of a glowing blue microchip on a circuit board, with text reading 'Excellent lithium batteries come from high-quality cores' and '18650A+ POWER CORE TO EXTEND BATTERY LIFE'.
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Ebike Power Network

72V 20‑50AH 18650 Battery Pack 40AH BMS Protection

72V 20‑50AH 18650 Battery Pack 40AH BMS Protection

$581.62 USD
$281.62 USD $581.62 USD
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AKJA High-Power 72V 21700 Lithium-Ion Battery Series –

Extended Capacity Options (20Ah, 30Ah, 40Ah & 50Ah) Engineered for 500W to 3000W Electric Motorcycles, Scooters & Fat Tire E-Bikes (Integrated 40A/45A Smart BMS, Peak 84V Output & Complimentary Universal 110V–220V Charger Included)

Unleash smooth, high-torque acceleration and extended driving range with the AKJA 72V High-Power 21700 Lithium Battery Series. Built using premium high-density 21700 cylindrical lithium-ion cells, this battery pack offers superior energy density, low internal resistance, and enhanced thermal endurance over traditional 18650 configurations.

Formulated to handle continuous high-amperage current for 500W to 3000W motor systems, the AKJA 72V series maintains steady voltage retention under heavy load without thermal cutoffs. Housed in a compact enclosure ($265 \times 180 \times 150\text{ mm}$) weighing between $4\text{ and }9\text{ kg}$, each pack is governed by an integrated Smart BMS and comes complete with a complimentary universal charger set.

⚠️ System Compatibility, Plug & Charger Selection Notice

IMPORTANT SELECTION & CHARGING GUIDELINES:

  • Nominal 72V DC Architecture: Charges to an 84V Maximum Peak Cut-Off with a 35V Discharge Cut-Off. Ensure your motor controller operates within standard 72V DC range.

  • Motor Power Compatibility: Safely feeds high-demand mid-drive and hub motor controllers rated from 500W up to 3000W.

  • Current Output Ratings: Rated for 45A discharge, 30A maximum continuous output, and a 60A instantaneous peak burst.

  • Complimentary Charger & Plug Customization: Ships by default with a standard 220V EU plug charger. If you require a US 110V AC plug or custom discharge connectors (XT60, XT90, Anderson), please specify your preference in the order notes at checkout!

🚀 Key High-Performance Features

  • Advanced 21700 Cell Architecture: High-density 21700 lithium cell matrix delivers long cycle life and minimal voltage drop under acceleration.

  • Supports Motors Up to 3000W: Handles steep inclines, heavy loads, and quick acceleration bursts without triggering protection trips.

  • Integrated Smart BMS Protection: Protects cells against overcharging, deep discharge, over-current spikes, thermal limits, and short circuits.

  • Compact Physical Footprint: Measuring $265 \times 180 \times 150\text{ mm}$, this geometry fits easily into cargo boxes, frame compartments, or under-seat bays.

  • Included Universal Fast Charger Set: Every battery ships with a matching CC/CV smart charger featuring automatic full-charge shut-off.

📊 Technical Specifications Matrix

Specification Parameter AKJA 72V Battery Series Specifications
Brand Name AKJA
Cell Type / Chemistry High-Density 21700 Lithium-Ion (Li-Ion)
Nominal System Voltage 72V DC
Peak Charge Voltage 84V DC
Discharge Cut-Off Voltage 35V DC
Capacity Options 20Ah, 30Ah, 40Ah, 50Ah
Continuous Discharge Current 30A Continuous / 45A Rated
Peak Instantaneous Burst 60A Maximum Burst
Motor Wattage Support 500W to 3000W Motors
Physical Dimensions ($L \times W \times H$) $265 \times 180 \times 150\text{ mm}$
Weight Range Approx. 4.0 kg – 9.0 kg (Depends on capacity)
Operating Charge Temp $0^\circ\text{C}$ to $55^\circ\text{C}$

 

📋 Ideal Applications

The AKJA 72V 21700 Lithium Series is engineered for:

  • 500W to 3000W Electric Motorcycles, Scooters, and City Mopeds

  • Fat Tire Off-Road E-Bikes and High-Speed Commuter Hybrids

  • Commercial Delivery Trikes, Cargo Bicycles & Marine Trolling Motors

📦 Package Contents

  • 1 x AKJA 72V 21700 Lithium-Ion Battery Pack (Selected Ah Capacity)

  • 1 x Complimentary Smart CC/CV Battery Charger (EU default; US 110V option available)

  • 1 x Power Discharge Connection Harness

Power your motorcycle or custom e-bike build with high-capacity 72V 21700 power. Select your capacity and charger options above, click Add to Cart, and order today!

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