• SAVANGER 4000mAh 18650 battery pack wrapped in blue PVC, featuring Type-C male and female cables for DIY projects.
  • Specification label on the SAVANGER battery pack showing 4000mAh capacity, 5V output, and 5.5V charge limit.
  • Close-up of the 15cm Type-C male and female connectors integrated into the 18650 battery pack.
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4000mAh 18650 Battery Pack | 5V Output with Type-C Male/Female

4000mAh 18650 Battery Pack | 5V Output with Type-C Male/Female

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$243.00 TWD
$243.00 TWD
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Short Product Description

The SAVANGER 4000mAh 18650 Battery Pack is a highly integrated, plug-and-play power solution for DIY electronics, robotics, and portable LED lighting. Unlike standard 3.7V raw cells, this compact 101g pack features a built-in power management circuit that delivers a stable 5V output directly through its integrated Type-C male and female cables. Available in-stock at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po, it offers makers and STEM students a safe, ready-to-use power source without the need for external charging modules or complex soldering.

Key Features

  • Integrated 5V Output: Built-in boost circuit converts the 3.7V nominal cell voltage to a stable 5V output, perfect for USB-powered DIY projects.
  • Dual Type-C Cables: Features a ~15cm Type-C male plug for power output and a Type-C female receptacle for easy recharging.
  • 4000mAh High Capacity: Provides long-lasting power for microcontrollers, sensors, and portable lighting systems.
  • Compact & Lightweight: Weighs only 101g with a small 7x3.8x2cm footprint, ideal for space-limited custom enclosures.
  • Certified Safety Standard: Manufactured to meet the GB31241-2022 safety standard for lithium-ion batteries.

Full Product Description

Built-in 5V Boost and Type-C Interface

This SAVANGER battery pack eliminates the need for external charging boards by integrating a 5V boost and charge management circuit directly into the unit. The dual-cable design features a Type-C female port for easy recharging using any standard 5V USB wall adapter, and a Type-C male plug to deliver a steady 5V output directly to your microcontrollers, Arduino boards, or custom LED setups. This plug-and-play architecture drastically reduces wiring clutter in your custom enclosures.

High-Capacity 4000mAh in a Compact Footprint

Measuring just 7cm x 3.8cm x 2cm and weighing only 101g, this dual-cell 18650 battery pack provides an impressive 4000mAh of capacity without adding excessive bulk to your projects. It is the perfect power source for space-constrained applications like 3D-printed robotics, portable IoT sensors, or custom cosplay props. The durable blue PVC shrink wrap protects the internal cells while keeping the overall footprint as small as possible.

Pro Tip from Our Technicians

Always use a standard 5V USB charger to recharge this battery pack. Our Sham Shui Po DIY electronics specialists strongly advise against using high-voltage fast chargers (such as 9V/12V PD or QC chargers), as the manufacturer label strictly warns that the charge limit voltage is 5.5V. Using a charger that exceeds this limit will permanently damage the internal battery management system (BMS) and pose a severe fire risk.

Technical Specifications
  • Brand: SAVANGER
  • Battery Type: 18650 Lithium-Ion Rechargeable Battery Pack
  • Nominal Capacity: 4000mAh
  • Nominal Voltage: 3.7V
  • Output Voltage: 5V DC
  • Charge Limit Voltage: 5.5V Max
  • Connectors: 1x USB Type-C Male, 1x USB Type-C Female
  • Cable Length: Approx. 15cm
  • Dimensions: 7cm x 3.8cm x 2cm
  • Weight: 101g
  • Compliance Standard: GB31241-2022

Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

FAQ Section

  • Can I use a fast charger to recharge this battery pack?No, you must strictly use a standard 5V USB charger, as the manufacturer specifies a maximum charge limit of 5.5V; using a fast charger may damage the internal circuitry.
  • What is the difference between this pack and a standard 18650 battery?Unlike a standard 3.7V bare 18650 cell, this pack includes a built-in circuit board that safely manages charging and boosts the output to a stable 5V via the Type-C cables.
  • How do I connect this battery to my DIY project?You can simply plug the Type-C male cable directly into any 5V Type-C compatible development board, LED controller, or sensor module for instant power.
  • Can I buy this battery pack today at your Hong Kong store?Yes, this SAVANGER 4000mAh battery pack is regularly stocked at our Sun Cheong Computer Co. Ltd. physical store in Sham Shui Po for immediate purchase and pickup.
  • Is this battery pack safe for use in enclosed 3D printed cases?Yes, the pack is wrapped in protective PVC and complies with the GB31241-2022 safety standard, making it safe for enclosed projects as long as it is not punctured or exposed to extreme heat.

Target Users / Applications

  • STEM students building Arduino or ESP32 robotics that require a simple, plug-and-play 5V power source.
  • Cosplayers and prop makers needing a compact, lightweight battery to power portable LED lighting via USB-C.
  • IoT developers prototyping remote sensor nodes that require an easily rechargeable 4000mAh backup battery.
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