---
product_id: 723969661
title: "16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ]"
brand: "funkawa"
price: "¥298"
currency: JPY
in_stock: false
url: https://www.desertcart.jp/products/723969661-16650-rechargeable-battery-with-battery-charger-16650-protected-3-7v
store_origin: JP
region: Japan
---

# Dual-slot USB fast charging 1800mAh high capacity Advanced multi-protection safety 16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ]

**Brand:** funkawa
**Price:** ¥298
**Availability:** ❌ Out of Stock

## Summary

> 🔌 Power your gear smarter, safer, and longer—because your adventures deserve the best!

## Quick Answers

- **What is this?** 16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ] by funkawa
- **How much does it cost?** ¥298 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/723969661-16650-rechargeable-battery-with-battery-charger-16650-protected-3-7v)

## Best For

- funkawa enthusiasts

## Why This Product

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

## Key Features

- • **Smart Safety Tech:** MCU-controlled constant current & voltage with overcharge and over-discharge protection for peace of mind.
- • **Durable & Long-lasting:** Protected 16650 battery with 500+ charge cycles ensures reliable performance and extended lifespan.
- • **Universal Dual USB Charger:** Charge one or two batteries simultaneously with any 5V USB source—power banks, laptops, or wall adapters.
- • **Power-packed 1800mAh Capacity:** Stay charged longer with high-density energy storage designed for demanding devices.
- • **Precision Fit for Premium Flashlights:** Compatible with top-tier models like Olight M1T Raider Plus and Streamlight PolyTac—never miss a moment.

## Overview

This 2-pack of 16650 protected 3.7V rechargeable batteries offers 1800mAh capacity with advanced MCU-controlled charging technology. The included dual-slot USB charger supports 5V input from common devices, delivering safe, efficient charging with multiple protections against over-voltage and over-current. Designed for compatibility with popular flashlight models like Olight M1T Raider Plus, these batteries provide up to 500 charge cycles, ensuring dependable power for professional and outdoor use.

## Description

Charger SPECIFICATIONS Freely charging 1 or 2 Pcs 3.7V Li-ion IMR 16650 18650 18500 14500 16340 Rechargeable BatteriesSmart LED display, The 2 slot charger will charge the lithium batteries when plug in,and the indicator light display in red, then turn into green after fully charged.The charger uses the MCU control technology, providing the constant current and constant voltage safety modelInput: DC 5V/2A-3A Charging Output: 4.2V / 600mA*1,600mA*2 16650 Protected 3.7V battery specifications Capacity: 1800mAh Voltage: 3.7V Discharge Cut-off voltage: 2.75V Standard Charge: 0.3 A~ 0.8A (Recommend 0.5A) /4.2V Maximum charge current: 0.8A Protected: with over- charge protection, over -discharge protection Dimensions (Dia. x H.)】: 16.6 x68 mm / 0.65 x2.7 inch Charging Time: Standard charge(0.5A) - 3.5 hours  Customer Instructions 1)Please charge fully to 4.2V before first use, Come with 50% charge on for transportation Safety Rules common Question & Answer1. Are these good for m4,Olight M1T Raider Plus,arisaka 600 series light,Streamlight PolyTac ?◆Answer: YES 2. Are these good for P2X ?◆Answer: NO, CAN NOT FIT P2X4. Do these come fully charged?◆Answer: NO, Come with 50% charge on them (for shipping purposes).4. Is it CE, UL, ROHS certified?◆Answer: CE , UL, and ROHS certified, tested by manufacturer. Why choose usBattery specialist----Shenzhen ShockLi Technology Co.,Ltd is growing batteries manufacturing, We are the most professional batteries with excellent quality control which earn us customers all over the world.

## Features

- 【Universal USB Charger】 Freely charging 1 or 2 Pcs 3.7V Li-ion IMR 16650 Rechargeable Batteries
- 【Safer with Multiple Protection】With advanced MCU control system, intelligent △V and -△V cut-off charging tech, providing the constant current and constant voltage safety model to prevent the batteries from over-voltage, over-current
- 【Convenient USB】The intelligent battery charger comes with Micro- USB input, applicable for 5V/2A-3A power bank, computer, USB wall charger
- 【16650 Protected Specification 】: The Capacity is 1800mAh, Dimensions (Dia. x H.) -16.7 x69mm / 0.65 x 2.7 inch, 500 Times Cycle Life, 16650 Protected battery is longer 4mm than 16650 Non-Protected battery
- 【 Fits for flashight models】: m4,Olight M1T Raider Plus,arisaka 600 series light,Streamlight PolyTac. (DO NOT NOT FIT P2X )

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 0.12 Kilograms |
| Color | Green,Red |
| Energy Specifications Met | CE, UL, RoHS |
| Battery Charge Time | 3.5 Hours |
| Current Rating | 0.8 Amps |
| Input Voltage | 5 Volts |
| Output Voltage | 4.2 Volts (DC) |

## Product Details

- **Number of batteries:** 2 Lithium Ion batteries required. (included)
- **Brand:** funkawa
- **Battery cell composition:** Lithium Ion
- **Battery capacity:** 1800 Milliampere Hour (mAh)
- **Voltage:** 3.7 Volts

## Images

![16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ] - Image 1](https://m.media-amazon.com/images/I/71WUrRNKkBL.jpg)
![16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ] - Image 2](https://m.media-amazon.com/images/I/61kS-YrOIjL.jpg)
![16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ] - Image 3](https://m.media-amazon.com/images/I/71TeQ75EfiL.jpg)
![16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ] - Image 4](https://m.media-amazon.com/images/I/61+6bqfmfDL.jpg)
![16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ] - Image 5](https://m.media-amazon.com/images/I/71Sc-onxptL.jpg)

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**Shop now:** [https://www.desertcart.jp/products/723969661-16650-rechargeable-battery-with-battery-charger-16650-protected-3-7v](https://www.desertcart.jp/products/723969661-16650-rechargeable-battery-with-battery-charger-16650-protected-3-7v)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-26*