---
product_id: 56034810
title: "YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light"
brand: "yumun"
price: "S$35"
currency: SGD
in_stock: true
category: "Misc."
url: https://www.desertcart.sg/products/56034810-yumun-replacement-8-4v-4000mah-battery-pack-with-a-new
store_origin: SG
region: Singapore
---

# YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light

**Brand:** yumun
**Price:** S$35
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light by yumun
- **How much does it cost?** S$35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/56034810-yumun-replacement-8-4v-4000mah-battery-pack-with-a-new)

## Best For

- yumun enthusiasts

## Why This Product

- Trusted yumun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Battery Pack Features:   - Power supply for bicycle light or headlamp  - Battery Type: 2x 18650 Rechargeable Battery  - Voltage: 8.4v.  - Capacity: 4000mAh  - Use time: 2-4 hours (it depends on different lighs and switched mode)  - Charging time: 4-5 hours.  - No memory effect.  - Environmentally friendly   Warnning:   - DO NOT dispose in fire or heat.  - DO NOT puncture, damage and disassemble.  - DO NOT mix fresh batteries with used batteries Charger Features:  - 100% Brand New and high quality Super strong protection.  - Brand New and High quality.  - Input : AC 100V - 240V.  - Output : DC 8.4V.  - LED indication for Power On / Charging / Full charge.   Package Includes:   - 1 x 8.4V 4000mAh Rechargeable Battery Pack  - 1 x Protection Pouch

## Features

- Use for most LED Headlamp bicycle light with DC 5.5*2.5mm interface
- Made of 2x18650 cells with PCB and poly switch for full protection
- Capacity: 4000mah. / Voltage: 8.4v
- Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time
- It is ideal for device that require large capacity but very small discharge current

## Images

![YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light - Image 1](https://images-eu.ssl-images-amazon.com/images/I/51tdZqWVI3L.jpg)
![YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light - Image 2](https://images-eu.ssl-images-amazon.com/images/I/51iPtt9zHXL.jpg)
![YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light - Image 3](https://images-eu.ssl-images-amazon.com/images/I/41uNzvUl44L.jpg)
![YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light - Image 4](https://images-eu.ssl-images-amazon.com/images/I/51LmDS1xbXL.jpg)
![YUMUN® Replacement 8.4v 4000mAh Battery Pack with a new Taillight for Cree Headlamp headlight Bicycle Bike Cycling Light - Image 5](https://images-eu.ssl-images-amazon.com/images/I/41PFvhGxU3L.jpg)

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**Shop now:** [https://www.desertcart.sg/products/56034810-yumun-replacement-8-4v-4000mah-battery-pack-with-a-new](https://www.desertcart.sg/products/56034810-yumun-replacement-8-4v-4000mah-battery-pack-with-a-new)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-24*