Description

This 21700 20S 10P li-ion cell 72V 50 Ah battery pack with 3600 Ah and 150A constant discharge is ideal for 10-11kW controller setups. It comes with the fully programmable, dynamic BMS with 0,6A balancing current and ON/OFF button. Maximum charging current is 50A (regen) and standard charging current is 25A (charger).

The BMS will anyways keep your batter pack well balanced. It has two temperature measuring points as additional safety feature during charging and discharging. The BMS is very reliable, with lots of set-up options via Android or iOS app. Robust and compact design. See detailed specs under the ‘Additional information’ tab.

Cell type: (option 1) BAK N21700CG-50E 5000mAh – 14.7A or (option 2) Tenpower INR21700-50ME 5000mAh – 15A

Production time may vary depending on cell stock. If you’re in a hurry, reach out to us for the latest lead times!

A frame expanded set is necessary to install this battery in models Q140MD (2018-2024) and 144i (2022-2024). Can be ordered separately.

See how the Qulbix batteries are made:

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VIDEO

See how the Qulbix QRBS works (quick battery swap):

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VIDEO

Compatible with older Qulbix bikes and frames:

• Q140MD Core mid-drive bikes (2018 – 2025)
• Q140MD Race and Off-road mid-drive bikes ( – 2025)
• Q140R hub bikes (a custom frame expander set is necessary, contact us for more info)
• 144 frame kits

Fits also (2025 -) models:

• Q140MD Moto Seat Frame kit
• Q140MD Bicycle Seat Frame kit
• Q155 Moto Seat Frame kit for Hub motors
• Q155 Bicycle Seat Frame kit for Hub motors

Battery includes:

• Amass XT150 connector set (red and black)
• 8 Awg Silicone Wire

Dimensions: 235 x 154 x 255 mm (L x W x H). Weight: 15,5 kg.

Additional information