down tube Small bottle case 36v 5.2ah 5.8ah 6.8ah cuttle ebike battery case

This compact and discreet lithium-ion battery is designed to fit snugly on a bike's down tube, often using the same mounting points as a standard water bottle cage. Its small "cuttle" or "mini bottle" form factor is ideal for riders who prioritize aesthetics and a low-profile look on their e-bike or conversion kit.

Specifications:
Voltage: 24v/36V Nominal Voltage. This is the industry-standard for most entry-level to mid-range e-bikes, providing a balanced and efficient power delivery for motors ranging from 250W to 500W.

Capacity Options: Available in various low-to-mid capacities, including 5.2Ah, 5.8Ah, 6.8Ah, and 7Ah.

Energy Rating (Wh): The energy capacity varies with the Ah rating. For example:

5.2Ah: 36V×5.2Ah=187.2Wh

7Ah: 36V×7Ah=252Wh

Cell Type: Constructed with high-energy density 21700 lithium-ion cells. These cells are larger than the traditional 18650 cells, which allows for higher energy storage and power output with fewer individual cells, resulting in a more compact and lightweight battery pack for the same capacity.

Configuration: The cell configuration for these capacities is typically a 10S1P (10 cells in series, 1 in parallel) or a 10S2P (10 in series, 2 in parallel), depending on the specific cell capacity. For example, a 10S2P pack using 3500mAh (3.5Ah) cells would provide a total capacity of 7Ah.

Key Features:
Ultra-Compact Design: The "cuttle" or small bottle shape is one of the most minimal battery designs available. It mounts to the bike's frame in a way that minimizes bulk and maintains a clean, traditional bicycle silhouette.

Lightweight: The use of 21700 cells and a minimal casing makes this battery exceptionally lightweight, with many versions weighing under 2 kg, which is a major advantage for smaller bikes, folding bikes, or for riders who want to keep the total bike weight as low as possible.

Range: While smaller in capacity, this battery is perfect for short to medium-distance rides. The range can be estimated at 10 to 30 miles per charge, depending on the rider's weight, terrain, and the level of pedal assist used. It is an excellent choice for a second battery to extend a ride or for use with low-wattage motors.

Ease of Use: It typically features a secure, lockable mounting cradle that bolts onto the bike's bottle cage mounts. The battery can be easily slid on or off, allowing for convenient off-bike charging.

Battery Management System (BMS): An integrated BMS provides essential safety features, including protection against over-charge, over-discharge, over-current, and short circuits. This ensures the longevity and safety of both the battery and the e-bike system.

Durability: The case is typically made from a durable, lightweight material like high-impact ABS plastic or aluminum alloy, providing protection from the elements and road vibrations.