EC1 /EM5 /EM6 Battery Pack – B Hidden Down-Tube 36V/48V Li-ion

$849.99

E-Bike / Battery Pack

EC1 / EM5 / EM6 Battery Pack — Hidden Down-Tube

A fully hidden down-tube battery pack designed to fit the EC1, EM5, and EM6 e-bike frames. Built by NewQingNian with up to 40 Samsung 21700 Li-ion cells for ~720 Wh, it integrates inside the down-tube with no external brackets for a clean look and balanced handling. A down-taken system with double lock allows quick removal for charging while adding theft protection, and CE / UN38.3 certification keeps it compliant for safe transport. Choose 36 V 20 Ah for endurance or 48 V 15 Ah for power.

Key Features

▪ Fits EC1 / EM5 / EM6 Frames — designed to sit inside the down-tube with no external brackets.
▪ Samsung 21700 Li-ion Cells — up to 40 cells (10S4P for 36 V / 13S3P for 48 V) for high energy density and long cycle life.
▪ Dual Voltage Options — 36 V 20 Ah (~720 Wh) for endurance or 48 V 15 Ah (~720 Wh) for power and climbing.
▪ Fully Hidden Mounting — maintains the bike's clean look and balanced handling.
▪ Down-Taken System & Double Lock — quick removal for charging or maintenance with enhanced theft protection.
▪ CE & UN38.3 Certified — certified for international electrical safety and safe battery transport.

Specifications

Brand	NewQingNian
Compatibility	EC1 / EM5 / EM6 e-bike frames
Mounting Type	Fully hidden in the frame down-tube
Removal & Locking	Down-taken system with double lock
Battery Cells	Samsung 21700 Li-ion, up to 40 cells (10S4P for 36 V / 13S3P for 48 V)
Chemistry	Lithium-ion (Li-ion)
Endurance Option	36 V 20 Ah (27.5–42 V) — ~720 Wh
Power Option	48 V 15 Ah (36–54.6 V) — ~720 Wh
Charging Time	36V 20Ah: 6–7 h · 48V 15Ah: 5–6 h (3A, DC 2.1 mm connector)
Certifications	CE, UN38.3
Weight	Approx. 3.9 kg

What's in the Box

EC1 / EM5 / EM6 hidden down-tube battery pack
Charger (3A, DC 2.1 mm connector)

We reserve the right to make changes to product information at any time without prior notice, including specifications, models, colors, and materials.