---
product_id: 505658559
title: "6PCS 9900mAh 18660 3.7V Rechargeable Battery and 2 Bay USB Batteries Charger Suit for 18650 Flashlights, Headlamps, Doorbells, 3.7 Volt Batteries Charger Suite"
brand: "maxiaeon"
price: "₩73941"
currency: KRW
in_stock: true
reviews_count: 8
category: "Maxiaeon"
url: https://www.desertcart.kr/products/505658559-6pcs-9900mah-18660-3-7v-rechargeable-battery-and-2-bay
store_origin: KR
region: South Korea
---

# Dual-bay USB fast charging 9900mAh high-capacity power Multi-layer safety protection 6PCS 9900mAh 18660 3.7V Rechargeable Battery and 2 Bay USB Batteries Charger Suit for 18650 Flashlights, Headlamps, Doorbells, 3.7 Volt Batteries Charger Suite

**Brand:** maxiaeon
**Price:** ₩73941
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your gear with confidence—charge fast, last longer, stay safe!

## Quick Answers

- **What is this?** 6PCS 9900mAh 18660 3.7V Rechargeable Battery and 2 Bay USB Batteries Charger Suit for 18650 Flashlights, Headlamps, Doorbells, 3.7 Volt Batteries Charger Suite by maxiaeon
- **How much does it cost?** ₩73941 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/505658559-6pcs-9900mah-18660-3-7v-rechargeable-battery-and-2-bay)

## Best For

- maxiaeon enthusiasts

## Why This Product

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

## Key Features

- • **Safety First, Always:** Built-in intelligent circuits protect against short circuits, overheating, over-voltage, and over-discharge—keeping you and your gear safe.
- • **Eco-Friendly Efficiency:** Discharging function reduces battery wear and extends lifespan, making your power solution greener and more cost-effective.
- • **Power That Lasts All Day:** 9900mAh 18650 batteries deliver extended runtime for your flashlights and headlamps—never get caught powerless again.
- • **Charge Smarter, Not Harder:** Dual-bay USB charger supports simultaneous charging of multiple batteries with intuitive LED status indicators for hassle-free monitoring.
- • **Global Ready, Anywhere You Go:** Worldwide voltage compatibility plus optional car adapter means reliable charging whether at home, office, or on the road.

## Overview

This 6-pack of 9900mAh 18650 rechargeable lithium-ion batteries comes with a dual-bay USB charger featuring intelligent safety protections and LED charging indicators. Designed for flashlights, headlamps, and other 3.7V devices, it supports worldwide voltage and includes temperature control to prevent overheating. Ideal for professionals who demand reliable, long-lasting power on the go.

## Description

desertcart.com: 6PCS 9900mAh 18660 3.7V Rechargeable Battery and 2 Bay USB Batteries Charger Suit for 18650 Flashlights, Headlamps, Doorbells, 3.7 Volt Batteries Charger Suite : Electronics

Review: Batteries work well in my stun gun light. Not many do. And usb charger convenient - Nice charger that runs off any USB port. And the batteries seem to hold a charge for impressive amount of run time.
Review: I Really Like Flashlights Powered by 18650 Batteries - This Maxiaeon charger comes with four 18650 batteries. Here's a couple of things to know. The batteries were individually wrapped in plastic. Charging went much better once I removed the plastic. Second point, I plugged into a USB charging port powered by a 2.0 18V battery, the type used on drills and other tools. I first thought the Maxiaeon charger was faulty because the 1st 18650 battery showed charged after about 5 minutes. Switching power supplies, I got charging results that I believe are accurate. So, I am pleased with this purchase. I have four flashlights that shine brightly.

## Features

- SAFETY PERFORMANCE: Built-in intelligent circuits protection to protect the battery safety charged. A protection against short circuit, overheat, over-voltage and over-discharge.
- Distinctively, the discharging function can decrease the hurt of battery, making it more efficient and environmentally friendly.
- Temperature protection: Stop charging automatically if the temperature of charger or battery gets too high when charging. Stainless steel rail is more durable and smooth. Worldwide voltage, suitable for the whole world, car adapter is available.
- CHARGING DISPLAY: This Battery charger with Red/Green led light display, And the charger will display the status of each rechargeable battery when charging, Automatically detects battery power status and displays charging progress, and automatically stops charging when complete.
- Charge Multiple Batteries at Once: Our charger can charge not only 2 batteries at once, but also different types of batteries at once.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BRH2SPXV |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Customer Reviews | 4.4 4.4 out of 5 stars (367) |
| Date First Available | January 1, 2023 |
| Item Weight | 8.6 ounces |
| Manufacturer | Shantou Baihao Technology Co., Ltd |
| Product Dimensions | 9.6 x 5.5 x 1.6 inches |

## Product Details

- **Brand:** MAXIAEON
- **Color:** Green,Red
- **Input Voltage:** 5 Volts
- **Output Voltage:** 3.7 Volts
- **Product Dimensions:** 9.6"D x 5.5"W x 1.6"H

## Images

![6PCS 9900mAh 18660 3.7V Rechargeable Battery and 2 Bay USB Batteries Charger Suit for 18650 Flashlights, Headlamps, Doorbells, 3.7 Volt Batteries Charger Suite - Image 1](https://m.media-amazon.com/images/I/610LRFDDanL.jpg)

## Questions & Answers

**Q: Does the negative side of the battery go in first (toward the spring inside)?  I don't see any polarity indication within and no instruction sheet.**
A: The positive terminal of the battery goes into the flashlight first.

**Q: How many batteries come with this?**
A: 6.

**Q: Why is there a false claim of capacity listed? These cells do not have anywhere close to the advertised capacity.**
A: I'm not sure that's a question That I could answer. but I guess it's just buyer beware and typical false advertising and they just want to see how much I can get away with before they have to take it down.

**Q: does it come with a battery case /holder how many batteries dows it come with**
A: It doesn’t have a case. It comes with 6 batteries. I put the batteries I’m not using in a small reusable plastic box.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Batteries work well in my stun gun light. Not many do. And usb charger convenient
*by J***N on November 27, 2025*

Nice charger that runs off any USB port. And the batteries seem to hold a charge for impressive amount of run time.

### ⭐⭐⭐⭐⭐ I Really Like Flashlights Powered by 18650 Batteries
*by J***B on January 5, 2025*

This Maxiaeon charger comes with four 18650 batteries. Here's a couple of things to know. The batteries were individually wrapped in plastic. Charging went much better once I removed the plastic. Second point, I plugged into a USB charging port powered by a 2.0 18V battery, the type used on drills and other tools. I first thought the Maxiaeon charger was faulty because the 1st 18650 battery showed charged after about 5 minutes. Switching power supplies, I got charging results that I believe are accurate. So, I am pleased with this purchase. I have four flashlights that shine brightly.

### ⭐⭐⭐⭐ Odd features
*by D***K on January 6, 2024*

Firstly, the battery has a counter-intuitive +/- install (+ is down on the spring). Secondly, the multiple light levels are in both steady and flashing modes (flashing might be good for some instances, but BAD for epileptic, etc.). Depending in which mode it was turned off, it might require multiple clicks to get the desired mode. This is true for both small and large areas. Also, threading care is required when installing a new battery. Other features are great. It can be very bright; has a great battery; has a great USB charger (with only minor green/red led quirks); it charges quickly; & lastly, this is a great price for 6 included batteries!

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.kr/products/505658559-6pcs-9900mah-18660-3-7v-rechargeable-battery-and-2-bay](https://www.desertcart.kr/products/505658559-6pcs-9900mah-18660-3-7v-rechargeable-battery-and-2-bay)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-02*