Silverfish E-Bike Battery 36V 48V 18650 Li-ion Pack with Key Lock and LED Indicator

Overview

The HNF Battery Silverfish is a professional-grade lithium-ion battery pack designed specifically for electric bicycles and light electric vehicles. Built around the industry-standard Silverfish form factor, this battery is engineered to deliver reliable, high-capacity power in a robust, weather-resistant housing that integrates cleanly with a wide range of e-bike frame designs. Available in 36V and 48V configurations, and capable of housing up to 52 Samsung, LG, or equivalent 18650 cells, the Silverfish battery offers OEM customers exceptional flexibility in capacity, voltage, and discharge rate specification.

The housing is constructed from aluminum alloy 6061 combined with PC+ABS composite panels, providing the structural rigidity and impact resistance required for daily road use while keeping overall weight competitive. Overall dimensions are 414.1mm tall, 113.8mm wide, and 75mm deep, fitting the standard Silverfish mounting rail used across hundreds of e-bike frame models worldwide.

Key Specifications

• Form Factor: Silverfish (standard rail mount)
• Voltage Options: 36V (10S) / 48V (13S)
• Cell Format: 18650 Li-ion (up to 52 cells)
• Housing Material: Aluminum alloy 6061 + PC+ABS
• Dimensions: 414.1mm (H) × 113.8mm (W) × 75mm (D)
• Lock: Key lock with spare key
• Indicator: LED battery level display
• Certification: UN38.3, MSDS
• MOQ: 10 pcs
• OEM/ODM: Available

Design and Construction

The Silverfish housing features a precision-machined aluminum alloy body that acts as both a structural frame and a passive heat sink, helping to manage cell temperature during sustained discharge. The PC+ABS end caps provide insulation and impact protection at the terminal zones. A machined key lock cylinder secures the battery to the frame rail, preventing theft and accidental removal during operation.

The top-mounted connector interface provides clean electrical contact with the e-bike controller harness, and the integrated LED indicator allows riders to check remaining charge at a glance without needing to power on the display unit. The charging port is separately positioned to allow convenient on-bike charging without removing the pack.

Cell Configuration and Capacity Options

HNF Battery offers the Silverfish pack in multiple capacity configurations to match a range of rider requirements and price points. Standard options include 36V 10Ah (10S3P), 36V 13Ah (10S4P), 48V 10Ah (13S3P), and 48V 15Ah (13S4P), with custom configurations available up to the maximum 52-cell housing capacity. Cell brand options include Samsung INR18650-35E, LG MJ1, Panasonic NCR18650B, and equivalent-grade domestic cells depending on budget and target market.

All packs include an integrated BMS with overcharge protection, over-discharge cutoff, short-circuit protection, and cell balancing to ensure consistent performance and long cycle life across the full cell configuration range.

Compatibility

The Silverfish form factor is compatible with the vast majority of e-bike frames that use the standard Silverfish downtube or rear-carrier rail mount, including popular OEM platforms from manufacturers in Europe, North America, and Asia. The connector pinout follows the standard 2-pin power plus multi-pin communication layout used by most mid-drive and hub-drive controller systems. Custom connector wiring is available on request.

OEM and Custom Solutions

HNF Battery works directly with e-bike brands, importers, and contract assemblers to develop customized Silverfish battery configurations. Available customization includes cell brand and grade selection, capacity and voltage configuration, BMS protection threshold settings, custom label and brand printing on the housing, cable length and connector type, and individual or bulk packaging. Sample units are available for compatibility testing and field validation before mass production commitment.

Why Choose HNF Battery

HNF Battery is a factory-direct lithium battery manufacturer based in Dongguan, China, supplying e-bike battery packs, custom LiPo cells, and industrial battery solutions to clients across Europe, North America, and Australia. Our in-house capabilities span cell sourcing, pack assembly, BMS integration, and final capacity testing. Contact us at sales@hnfbattery.com or WhatsApp +86 134-8090-2696 for samples, pricing, or technical consultation.