E-Bike Battery - 52V 16Ah Super-Shark Type with Joinsun 21700 Battery (INR 21700-40D 4Ah NCM811 Lithium Cell)
Blog | Published by Alex on August 16, 2025
Overview
This 52V e-bike battery has been redesigned for easier installation and enhanced durability. The cells are now securely supported within a honeycomb structure, while the casing and mounting points are thicker and reinforced. The mini 3-pin charging port is stronger, and a convenient on/off switch has been added for user control.
The Shark-style battery is well-loved for its sleek design. This 52V 16Ah downtube battery utilizes high-capacity
Joinsun INR 21700-40D 4Ah cells, capable of delivering 40A output. It can be locked to the downtube for security. With over 830Wh of energy, offering both power and a compact design. The Super-Shark is a ruggedized evolution of the original Shark battery.
All lithium cells are top-grade Joinsun 21700-40D 4Ah battery, certified for quality and reliability.
Available charger options include 2A, 4A, 1–5A, and adjustable 80/90/100% charging modes.
This 52V (14S) 16Ah lithium-ion downtube battery is housed in a Reention case with a 40A BMS. A mounting cradle with a 12 cm pigtail is included for installation.
Features
(1) Reinforced metal mounts and strengthened plastic tabs with a thicker outer case
(2) 56 Joinsun 21700-40D cells arranged in a 14S × 4P honeycomb layout
(3) Extra mounting flexibility via an additional rear cradle slot
(4) Mechanical key lock for enhanced security
(5) Four-LED push-button charge indicator
(6) Compatible with standard water bottle mounts on the downtube
(7) XT-90 connectors for reliable power output
(8) Slim profile for fitting a wide range of frame types
(9) Long-range performance in a compact package (typically 36–55 miles, depending on load and terrain)
(10) Upgraded Reention mini-XLR port for reliable charging
With a 40A BMS and 14S × 4P configuration, the battery supports short bursts up to 40A and continuous output of 30A. For optimal cycle life, continuous discharge is recommended below 25A.
About E-Bike 52V Batteries
Electrify Bike uses cutting-edge 21700 lithium-ion cells from Joinsun to ensure high energy density and safety. These batteries deliver higher capacity than other packs of similar size, providing more energy in the same footprint.
While premium cells increase cost, the performance and reliability are well worth it. Using quality cells, BMS, and durable construction ensures maximum safety. Low-profile versions may still incorporate 18650 cells to maintain compatibility with compact frames.
Except for the Super Shark, most 52V batteries can provide up to 50A continuous, surpassing 2500W. Because few motors require this much power, these batteries run cooler and last longer than those matched exactly to motor output.
52V batteries remain our most popular option, ideal for 48V motors including Bafang BBSHD, BBS02, and Tong Sheng TSDZ2. They are also preferred for CYC Photon, X1 Stealth, and X1 Pro mid-drive systems.
