---
product_id: 658424362
title: "Button Top 3.7V 5000mAh(21 * 75 not 18 * 65) Rechargeable Battery Type-C Input/Output Protection Circuit Built-in Large Capacity 3.6V Replacement Battery for Flashlight, Headlamps etc 2 Pack"
brand: "lbf"
price: "8461 som"
currency: KGS
in_stock: true
reviews_count: 8
category: "Lbf"
url: https://www.desertcart.kg/products/658424362-button-top-3-7v-5000mah-21-75-not-18-65
store_origin: KG
region: Kyrgyzstan
---

# Type-C input/output fast charging 5000mAh high capacity Built-in 6-fold protection circuit Button Top 3.7V 5000mAh(21 * 75 not 18 * 65) Rechargeable Battery Type-C Input/Output Protection Circuit Built-in Large Capacity 3.6V Replacement Battery for Flashlight, Headlamps etc 2 Pack

**Brand:** lbf
**Price:** 8461 som
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up smarter, last longer, and stay safe—because your gear deserves the best.

## Quick Answers

- **What is this?** Button Top 3.7V 5000mAh(21 * 75 not 18 * 65) Rechargeable Battery Type-C Input/Output Protection Circuit Built-in Large Capacity 3.6V Replacement Battery for Flashlight, Headlamps etc 2 Pack by lbf
- **How much does it cost?** 8461 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/658424362-button-top-3-7v-5000mah-21-75-not-18-65)

## Best For

- lbf enthusiasts

## Why This Product

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

## Key Features

- • **Power That Lasts:** 5000mAh capacity delivers extended runtime for your flashlights and headlamps—stay illuminated longer than ever.
- • **Built-In Safety Shield:** Advanced 6-layer protection guards against overcharge, short circuit, and temperature spikes—peace of mind in every charge.
- • **Fast & Flexible Charging:** Type-C input/output lets you recharge quickly and even power your phone on the go—dual-purpose convenience.
- • **Perfect Fit for Pro Gear:** Sized 21.5x75.2mm (not 18x65) to fit high-performance flashlights, headlamps, and emergency devices—upgrade your essentials.
- • **Eco-Friendly Rechargeability:** Recharge over 1000 times with zero memory effect—ditch disposable batteries and join the sustainable power movement.

## Overview

The LBF Button Top 3.7V 5000mAh rechargeable battery features a large 5Ah capacity with Type-C input/output for fast charging and device powering. Its built-in 6-fold protection circuit ensures safety against overcharge, short circuit, and temperature issues. Designed for professional-grade flashlights, headlamps, and emergency gear, this 2-pack battery supports over 1000 recharge cycles, offering eco-friendly, reliable power in a slightly larger 21.5x75.2mm form factor.

## Description

Buy LBF Button Top 3.7V 5000mAh(21 * 75 not 18 * 65) Rechargeable Battery Type-C Input/Output Protection Circuit Built-in Large Capacity 3.6V Replacement Battery for Flashlight, Headlamps etc 2 Pack: 3.7V - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good batteries - I used this in my imalent flashlight. I am pleasantly surprised at how good these batteries as compared to the OEM battery. It lasts much longer. I run my flashlight at super bright, and the OEM battery constantly needed to be recharged. This lasts at least 2x as long. And because there are two, I always have one ready to go.
Review: Correct size for 21700 button top, protected cells with onboard USB C charging - 1. Sized as advertised 2. Works in devices speced for 21700 buton top batteries 3. Charges with USB C standalone or in devices with onboard charging. This is a BUTON TOP 21700 battery. Not a flat top. Most negatively reviews are based on allegedly incorrect dimensions. Most people don't insist that these rechargeable 21700 batteries are all custom made with a range of sizes depends on the specs. Many protected cells with USB C charging built-in will be up to 750mm in length while some flat tops will be substantially less than 700. And then you have variences in device battery bays that will only work with shorter, standard or longer batteries. This on works for devices made for protected USB C chargeable cells. The fit in my Coast headlamp, Fenix PD36R PRO, and Diverite dive torches. The charge while instaled works on all three devices and the batteries are charging with my fast charging block. These batteries fill my need for travel friendly high capacity batteries for my EDC and specialty lighting devices. I will amend my review if perfect is bad over time.

## Features

- 【Battery Specification】 Battery type: (21*75 not 18*65) Button Top PCB Protection Circuit Built-In, Capacity: 5000mAh(5Ah), Wh Rating: 18.5Wh, Voltage: 3.7V, Size: 21.5*75.2mm(0.85*2.96 inches), Feature:Type-C Input/Output, Quantity: 2 Pack.
- 【Rechargeable 1000+ Times】 A single 3.6 Volt rechargeable battery can recharge up to 1000 charging and discharging cycles and no memory effect. Replace 1000+ disposable alkaline batteries, reduce the waste of resources and good value for the money.
- 【Large Capacity】 LBF 3.7V battery with a capacity of 5000mAh and voltage of 3.7V, high capacity battery with low self discharge rate, high power consumption, high energy density and pollution-free design, No need to charge batteries frequently.
- 【Applicable Device】LBF 21750 battery for led flashlights, headlights, bicycle lights, emergency lights, work lights, loudspeakers, Instrumentation. The USB-C Input/Output battery can be used as an emergency power bank to charge your phone or other devices. It's 21.5*75.2mm, not 21*70mm. Please check whether it is the battery you need before purchasing.
- 【Secure and Reliable】The highest quality, the happiest customer. LBF Protection Circuit Built-In Battery features six types of protection, including temperature, short circuit, overcharge, and overcurrent protection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9N6SH55 |
| Amperage | 10 Amps |
| Antenna Location | Flashlight, Headlamp, Toys |
| Battery Capacity | 5 Amp Hours |
| Battery Cell Composition | Lithium Ion |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 0.14 Pounds |
| Best Sellers Rank | #89,201 in Health & Household ( See Top 100 in Health & Household ) #39 in 3.7V Batteries |
| Brand | LBF |
| Customer Reviews | 4.2 out of 5 stars 67 Reviews |
| Item Dimensions | 0.85 x 0.85 x 2.96 inches |
| Manufacturer | LBF |
| Model Number | L2150 |
| Number of Batteries | 2 Lithium Ion batteries required. (included) |
| Recommended Uses For Product | Flashlight, Headlamp, Toys |
| Reusability | Rechargeable |
| UPC | 703775679869 |
| Unit Count | 2.0 Count |
| Voltage | 3.7 Volts |
| Warranty Description | 1 |

## Product Details

- **Number of Batteries:** 2 Lithium Ion batteries required. (included)
- **Brand:** LBF
- **Battery Cell Composition:** Lithium Ion
- **Battery Capacity:** 5 Amp Hours
- **Recommended Uses For Product:** Flashlight, Headlamp, Toys

## Images

![Button Top 3.7V 5000mAh(21 * 75 not 18 * 65) Rechargeable Battery Type-C Input/Output Protection Circuit Built-in Large Capacity 3.6V Replacement Battery for Flashlight, Headlamps etc 2 Pack - Image 1](https://m.media-amazon.com/images/I/61R2Z+z+uhL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good batteries
*by H***T on March 7, 2026*

I used this in my imalent flashlight. I am pleasantly surprised at how good these batteries as compared to the OEM battery. It lasts much longer. I run my flashlight at super bright, and the OEM battery constantly needed to be recharged. This lasts at least 2x as long. And because there are two, I always have one ready to go.

### ⭐⭐⭐⭐⭐ Correct size for 21700 button top, protected cells with onboard USB C charging
*by M***S on May 14, 2025*

1. Sized as advertised 2. Works in devices speced for 21700 buton top batteries 3. Charges with USB C standalone or in devices with onboard charging. This is a BUTON TOP 21700 battery. Not a flat top. Most negatively reviews are based on allegedly incorrect dimensions. Most people don't insist that these rechargeable 21700 batteries are all custom made with a range of sizes depends on the specs. Many protected cells with USB C charging built-in will be up to 750mm in length while some flat tops will be substantially less than 700. And then you have variences in device battery bays that will only work with shorter, standard or longer batteries. This on works for devices made for protected USB C chargeable cells. The fit in my Coast headlamp, Fenix PD36R PRO, and Diverite dive torches. The charge while instaled works on all three devices and the batteries are charging with my fast charging block. These batteries fill my need for travel friendly high capacity batteries for my EDC and specialty lighting devices. I will amend my review if perfect is bad over time.

### ⭐⭐⭐⭐⭐ Excellent Button Top Battery For My Dive Light
*by T***L on September 6, 2025*

Bought these for backups for a 100 meter-certified dive light, and they are fit perfectly and work just as good as the OEM battery for battery life per charge and thanks to the charger I can charge both at one time. BE CAREFUL to choose the "top of battery" you need - the flat top and the button top are NOT interchangeable even though the power rating might be the same, and you'll avoid having to return the wrong version! If you don't have a charger tray for multiple batteries you CAN charge one at a time with a USB-C cable plugged into a small socket near the positive (button top) end, and the battery has a very small blue LED that blinks while charging, solid when charge is done.

## Frequently Bought Together

- Button Top 3.7V 5000mAh(21*75 not 18*65) Lithium-ion Rechargeable Battery Type-C Input/Output Protection Circuit Built-In Large Capacity 3.6V Replacement Battery for Flashlight, Headlamps etc 2 Pack
- EBL Smart Rapid Battery Charger for Rechargeable 3.7V/3.6V Li-ion IMR Batteries 26650 18650 21700 14500 16340(RCR123), Ni-MH/Ni-Cd AA AAA C Batteries, Upgraded

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-04-28*