48v Polly shark down tube electric bike battery 13ah

Polly shark down tube electric bike battery 13ah 14.5aH 15.6ah 17ah 20.4ah hailong shape e-bike battery hailong polly ebike battery casing 48v specification:

Product Model	J0047
Nominal voltage	48V
Nominal capacity	13ah 14.5aH 15.6ah  17ah  20.4ah
Standard charge current	2A
Max discharge current	customized
Cycle life	More than 1000 times
Charge Method	Constant Current, Constant Voltage
size(mm)	Polly DP-9 367mmx141mmx90mm Polly DP-5 368mmx96mmx90mm Polly DP-6 368mmx112mmx90mm
Weight	About 5kg
Charge temperature(°C)	0~45°C
Discharging temperature	-20~60 °C
Storage temperature	-20~35°C
Protection	Over charge protection Over discharge protection Over current protection Short circuit protection,etc.

Based on the information from various e-bike suppliers and forums, here is a detailed, on-page description for a 48V Polly "Shark" downtube e-bike battery with a 13Ah capacity.

48V Polly "Shark" Downtube E-Bike Battery 13Ah

The "Polly" or "Shark" battery is a popular and widely used style for e-bike conversions and DIY builds. It gets its name from its distinctive shape, which resembles a shark's fin when mounted on the bike's downtube. This design provides a clean, professional, and well-balanced look, making it a favorite for many riders.

Key Specifications:

• Battery Type: Lithium-ion (Li-Ion)

• Voltage: 48V Nominal. This higher voltage is well-suited for a wide range of motors, typically from 500W to 1000W. A 48V system provides excellent torque and a higher top speed compared to a 36V system.

• Capacity: 13Ah (Amp-hours). This capacity offers a great balance between size, weight, and range, making it ideal for daily commuting and recreational riding.

• Energy Rating: 624 Wh ($48V\times 13Ah=624Wh$). This energy rating indicates a substantial power reserve, capable of providing a long range on a single charge.

• Range: The typical range for a 48V 13Ah battery is between 25 and 50 miles, though this can vary significantly based on factors like terrain, rider weight, assist level, and speed.

• Cell Configuration: The battery pack is typically configured as 13 series and 5 parallel (13S5P). This means 13 cells are connected in series to achieve the 48V nominal voltage, and 5 of these strings are connected in parallel to achieve the 13Ah capacity. It is often built with high-quality 18650 cells (e.g., from Samsung, Panasonic, or LG).

Features and Design:

• Sleek Downtube Design: The "Polly" case is specifically designed to mount to the bike's downtube using standard water bottle cage mounts. This central mounting location helps to maintain the bike's balance and handling.

• Removable and Lockable: The battery securely locks onto its mounting cradle with a key, providing an anti-theft deterrent. It can be easily removed for convenient off-bike charging or for storage.

• Built-in Safety: A sophisticated Battery Management System (BMS) is integrated into the battery to ensure safe and reliable operation. This BMS protects against:

  • Over-charging and over-discharging

  • Over-current and short circuits

  • Overheating

• LED Power Indicator: Many models feature a built-in LED display or indicator that shows the remaining battery charge at a glance, allowing you to easily monitor your power level.

• Durable Casing: The battery is housed in a hard, impact-resistant ABS plastic or aluminum alloy case that protects the internal cells from physical damage and the elements.

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• Compatibility:

The Polly "Shark" battery is a versatile option that is compatible with a wide range of e-bike motors and controllers, including popular brands like Bafang. It is most often used for conversions and DIY projects. However, it's essential to check the physical dimensions of the battery case and the connector type (e.g., XT60, Anderson) to ensure it is compatible with your specific bike frame and motor controller.