With so many options available in the market choosing the best 21700 battery for flashlight can be tricky for normal customers. Consumers can get overwhelmed by the huge marketplace and end in a place by choosing a wrong product that will not serve its purpose perfectly.
The purpose of this review is to avoid misunderstanding and help the customer with a shortlist of the most popular products of the marketplace by analyzing the features, functions, specifications, customers rating, and reviews.
This review section will help you with the selected list of the most favored and trended items of the marketplace where you can easily check the reviews from the actual customers.
Top 10 Best 21700 Battery For Flashlight

Here are the top 21700 battery for flashlight we picked, check their features.
1. Light Me Bright FZR2000 High Powered Led Flashlight 2000 Lumen 21700 Battery USB Rechargeable Flashlights High Lumens, Zoomable 5 Lighting Modes, E
- MULTIPURPOSE FLASHLIGHT WITH 5 LIGHTING MODES: High / Medium / Low / Strobe / SOS. Different modes allow using the same flashlight for different applications: outdoor activities (camping, hiking, running, exploration, caving, dog walking, hunting, fishing etc.) professional duty use (military, police, firefighter, security, mechanic etc.) indoor, emergencies, search, rescue, survival, EDC, car and household repairs, self defense etc.
- USB RECHARGEABLE FLASHLIGHT – Planet friendly, saves money: It comes with a 21700 flashlight rechargeable battery (no need for disposable batteries). Flash light has built-in USB Type C charging port. To charge flashlight, connect included USB-C cable to wall charger, car charger, power bank, laptop or desktop computer. Led flashlight rechargeable is equipped with charging indicator (red light means charging, green light means fully charged).
- SUPER BRIGHT FLASHLIGHT- LightMeBright FZR2000 flashlight delivers up to 2000 real lumens. The flashlight is equipped with XHP50 LED (2-5 times brighter than a basic LED flashlight). Max output 2000 lumens, max beam distance 1148 feet (350 meters).
- WATER RESISTANT & DURABLE – Flashlight is made of durable military grade aluminum alloy. IP65 waterproof flashlight can be used normally in bad weather conditions such as rain or snow.
- ZOOMABLE & COMPACT – One hand zoom in / out operation. Powerful LED generates a brilliant large area floodlight or a perfectly focused spotlight. Pocket sized small flashlight – 7 inches in length. Flash lights come with a metal pocket clip and lanyard.
2. Fenix PD36R 1600 Lumen Type-C USB rechargeable LED tactical Flashlight, 2 X batteries with EdisonBright charging cable carry case bundle
- 4-hour fast charging with 5V/3A USB Type-C charging port.
- Bundle includes additional battery and EdisonBright charging cable carrying case
- Instant power activation with momentary tactical tail switch.
- 1600 maximum lumens output and 283 meters beam distance.
- Powered by a High Capacity 21700 Rechargeable Li-ion Battery ( 2 X included)
3. Fenix are-D1 USB Powered Smart Battery Charger for 21700/18650/16340 with EdisonBright BBX5 Battery Carry case
- Batteries NOT included
- Bundle includes EdisonBright BBX5 battery carry case
- Single charging bay
- Compatible with Battery Types 26650、21700 18650、16340 14500、10440 AA AAA C
- USB powered battery charger
4. MXLEGNT LED Handheld Tactical Flashlight – 2000 High Lumen Type-C Rechargeable Flashlights with 21700 Battery & Holster for Outdoor Travel Camping
- 【Adjustable Brightnesses & Strobe】The flash lights has 4 different brightness modes (Max Lumens-high-medium-low) and 1 strobe mode. Short press once to switch the brightness,short press twice to enter the strobe mode. You can switch to different mode according to different environments. Torch flashlight accompanies you through every dark night.
- 【Brighter & Farther】MXLEGNT Handheld flashlight with 2000LM maximum output and 18623cd light intensity,light up every conner in darkness.Ultra-long irradiation distance of 850 feet make this high lumens led flashlights can easily light up everywhere you go.
- 【Waterproof & Tactical】IPX7 waterproof level makes this high beam flashlight is not afraid of water and rain. The body of the small powerful flashlight is made of high-quality aluminum alloy, sturdy shell makes the tac lights flashlight not afraid of being crushed by heavy objects. The toothed design of the lamp cap allows it to be used as a tool for personal defense. Size of 145mm 30mm is portable for every day carry. Such a small powerful flashlight can adapt to most extreme environments.
- 【Warry-Free Purchase & Warranty】You will get: Super bright flashlight *1, battery *1, charging cable *1, storage bag *1. Warranty: We provide 1 year warranty and 30 days free replacement or refunds guarantee for sturdy flashlight. Unhappy? For whatever reason,we will refund for you! Just enjoy your life.
- 【USB Charging & Longer Lasting time】With USB charging port, bright led flashlight can be charged via a power bank, computer, or car charger. The camping flashlight switch button will flash green during charging, and will stay green when fully charged. Powerful 21700 battery makes the outdoor flashlights can work up to 85 hours(Low brightness mode).
5. Gray Convoy S21A with luminus sst40 ,Copper DTP Board and ar-Coated Inside, Temperature Protection,21700 Flashlight,Torch Light,(no Battery) (SST40
- max 2300LM,Built-in temperature control, low voltage protection, reverse connection protection.
6. Nitecore MPB21 21700i Mini Rechargeable Lantern Flashlight Bundle with 5000mAh Battery Charger and LumenTac Micro USB Cabl
- ULTRA-COMPACT 3-in-1 EDC KIT – All items are neatly packed in a small hardshell case, perfect for safe storage and everyday carry, or as an accessory to the Nitecore 21700 flashlights.
- MULTIPURPOSE LANTERN – a ML21 magnetic high CRI flashlight lantern with a NL2150HPi 5000mAh battery and a MPB21 magnetic charger.
- COMPACT AND PORTABLE – snap onto the top of the battery, magnetic high CRI flashlight lantern ML21 provides 80 lumen of light, great for simple activities like camping, reading, or signaling for up to 19 hours
- MPB21 EDC KIT – Included in this bundle is a magnetic snap on ML21 lantern, NL2150HPi 5000mAh rechargeable battery, magnetic snap on MPB21 charger, hardcase and LumenTac micro USB cable.
- A THUMB-SIZE CHARGER – The dual function charger MPB21 snaps onto the top of the battery and provides an easy way to charge your battery, or supply up to 2A current to your phone and other electronic devices.
7. Fenix are-A2 Home/in-car Battery Charger for 21700/18650/16340 with EdisonBright BBX5 Battery Carry case Bundle
- Compatible Batteries 10440 14500 16340 18650 21700 26650 Ni-MH / NiCd: AA, AAA and C
- Compatibility with multiple battery types
- Bundle includes 12V in-car charging cable and EdisonBright BBX5 battery carry case
- AC/DC charging supported
- Charge 1 or 2 batteries at the same time
8. fenix E35 V3.0 21700 Powered Flashlight, Black,
- Battery features a USB-C charging port (stand alone charger not required)
- Uses a Fenix ARB-L21-5000U battery (Supplied)
- Waterproof IP68, 2m depth & dustproof
- Features a Luminus SST70 LED
- 3000 Max lumen output
9. IMALENT MS03 21700 4000 mAH Customized Type-C Rechargeable Battery Only for MS03 and MS03W Flashlight
- The IMALENT 217P40 Type-C 21700 40000mAh is designed only for Imalent MS03 and MS03W flashlight (13000 lumens).
- Size: 75.0mm (L) x 21.0mm (D) , Weight:73g
- Voltage:3.6V, Charging Current:Recommended 2A(Maximum)
- The 4000mAh battery packaged by the little flashlight
- The IMALENT 217P40 is a 4000mAH high performance, high drain rechargeable battery.
10. Nitecore E4K EDC Flashlight with USB-C Rechargeable Battery, Black, E4K-XP-L2-V6
- INCLUDES – 21700 rechargeable Li-ion battery, USB-C charging cable, CR123A battery magazine, two-way pocket clip, holster, lanyard, spare o-ring
- MAX 4400 LUMEN OUTPUT – Thanks to 4 CREE XP-L2 V6 LEDs and a high capacity 21700 battery
- SPECIAL MODES – Activate SOS, beacon, and a dizzying strobe mode for self-defense
- EASY TO USE – Comes with a large, side switch for easy activation with bare or gloved hands. Plus, activate 5 brightness levels and 3 special modes!
- MODE MEMORY – This useful function automatically remembers your last mode
How to Choose the Best 21700 battery for flashlight: Buying Guide
When it comes to choosing the right 21700 battery for flashlight, you should be assured that you are making the right choice. Understanding about the product before buying it is the most important part. Sometimes with so many options, evaluating the right choice at the right moment can be problematic.
So, check out the buying guide to overcome all the hassle of finding your best solution.
Features of the 21700 battery for flashlight
The first thing to check out on any product is the feature. You have to locate the useful features that will come in handy in your needs. Sometimes a product can be filled with tons of features to look good on normal eyes but their features can be worthless in practical use.
So, before choosing the right item you need to evaluate the features from the feature section and the description section to see if you are going to use them or not. If the products come with some of the efficient features, you can undoubtedly choose them.
Check the Specifications
Sometimes, we don’t have enough time to check on the specification section and are quickly drawn to buy a product. While the products we are suggesting here are the best ones according to the users, we still suggest taking a look at the specifications.
The specifications of the 21700 battery for flashlight will let you informed about the uses and advantages of using the products. You can then determine if that can fulfill the purpose of your needs.
Yes, there can be a few problems understanding the whole specification section if it is too long. What we suggest is to look for the key features, performance, how much the products going to cost and their after-sale services.
Design of Product
The market is full of wonderful products, and it can be tough to decide which one to choose. However, the first impression you can make of the item is the overall design.
You can check out the material, finish, color, and other visual aspects of the product to get a taste of the manufacturer. If you like the overall design, you can check out other factors before choosing the item.
Seller Rank in the Marketplace
If you buying the products from our shortlisted table, then one thing you can consider is to check the seller rank. A trendy and growing product means it is delivering good performances to most of the customers.
And better trends and growth of selling means better seller rank. And 21700 battery for flashlight from a good seller rank will ensure not only good quality of the item but also a better after-sale service and good warranty service if available.
Durability and Stability of the Product
You need to check out the description and reviews section to see how durable and stable the product is. A good product will be durable, will last longer, and will provide stable uses throughout its lifetime.
The 21700 battery for flashlight we have suggested have mostly been made in a way to last longer with providing stable performance in uses, but the best thing is to click the item and check out the stability and durability according to your personal need.
User Friendliness and Comfort
No one wants discomfort and critical toughness when using a product. Comfort is one of the most important considerations when choosing the 21700 battery for flashlight. Most of the products that are selected in this article are popular which means have better served the most users.
So, we are certain that these products are comfortable and user-friendly enough to satisfy most customers. But you can watch each of the products on our list to see which fulfills your satisfaction the most.
Frequently Asked Questions (FAQs)
What is the Price Range for 21700 battery for flashlight?
The item can come with several cost ranges. The price can go up depending on the quality of the items and the ability to last longer periods, functions, specifications, features, and reliability.
The modern marketing trends have left us with little clues on the actual price. Sometimes a product manufactured cheaply can cost a lot more than a quality one. Some manufacturers spend more on marketing than manufacturing creating better reach and less quality.
So, you should compare the price of the products from our review segment to select the best features, quality, and performance of the product in a certain price range.
Why Should You Buy the 21700 battery for flashlight?
If you need an item, then understanding the scenario is simple. But if you are not, then think sensibly if the benefits of this product will certainly fulfill your need. Ask yourself, why do you want to have the product.
What we have suggested in our top pick is the best items according to many users. If you have made up your mind, then you can read the reviews of the customers before choosing the right item.
When Should I Buy a New 21700 battery for flashlight?
There can always be a question if:
Is it the right time to buy the 21700 battery for flashlight, or you should wait for few times to see if the right products have been launched to serve your need?
It is pretty difficult to determine if the products that are actually on the marketplace are the best, or the best items are yet to come. But the suggested products are popular and have very good reviews from a lot of customers.
So, if you need the product right now, wasting any time is not sensible.
Which Type of 21700 battery for flashlight is the Best?
There are different types of 21700 battery for flashlight in the marketplace. Understand your need first. Which type of this product will be most beneficial to you. You can also go through the product list and see their reviews, pros, cons, and then select the best type of items for now.
Final Thought
I hope our product table, review section, and buying guide will help you determine the right items for your need. If you are looking for the best 21700 battery for flashlight then there are multiple options from our product list.
You can go check out the short features of these items from our review to pick one or two to check for further reviews. Click these products and see the reviews of the customers, description of the products, and rating of it to make a final decision for buying it.
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