20700 vs 18650 - Difference Between 20700 Battery and 18650 Battery

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You might be wondering, “What’s the difference between a 20700 battery and an 18650?” The 20700 battery offers a whopping 30% life span increase over the 18650, but it comes at an increased cost.

It is important to note that there are certain terms to understand as well as some important factors to look out for when selecting a battery in order to avoid complications. Some of the major factors to look out for include durability or average battery life span of the battery, your physical environment and the device the battery would be used for. A 20700 rechargeable battery, as well as a 18650 Li-ion rechargeable battery, may appear to be similar, however, it should be noted that the differences between these two batteries lies in their physical properties and sometimes, in their area of application.

20700 vs 18650 Battery

20700 battery	18650 battery
It is specifically designed to power high drain devices	It is mostly used for flashlight
It has a nominal voltage of 3.7 volts and a maximum voltage of 4.2 volts	It has a nominal voltage of 3.6/3.7 volts
It has a capacity of between 3000mAh and 5000mAh	It has a capacity of between 1200mAh and 3600mAh
Charge time takes an average of 4 to 6 hours	Charge time takes an average of 4 hours

Definitions for 20700 battery and 18650 battery

20700 battery

20700 rechargeable batteries are high lithium ion cell batteries that are usually defined or grouped by size. They are highly rated rechargeable batteries that are constructed with a hi-drain capability as well as a 3000mAh to 5000mAh capacity. It is also designed to be used for devices such as electric vehicles, scooters or skateboards, cordless power tools, custom projects and battery packs. A 20700 rechargeable battery has a nominal voltage of 3.7 volts and a maximum voltage of 4.2 volts.

18650 rechargeable batteries are lithium-ion rechargeable batteries that come in a standardized industry size of 3.6 and 3.7 volts and have their capacity between 1200mAh and 3600mAh. There are two types; Protected and Unprotected. It is an extremely popular battery source for flashlights. The charge time for a 18650 battery varies depending on the charger and battery type. The average charge time for a 18650 battery is usually four hours.

Differences Between 20700 and 18650 Batteries

18650 battery

There are various differences between a 20700 rechargeable battery a 18650 Li-ion rechargeable battery. However, some of these differences will be discussed below.

A 20700 battery has larger cells and as such, it has a higher capacity as well as a higher discharge rate than a 18650 battery. The 20700 battery is 21mm in diameter and 70mm in length while the 18650 battery is 18mm in diameter and 65mm in length. Also, a 20700 battery has a capacity of between 3000mAh and 4000mAh for power tool batteries while a 18650 battery has a capacity of between 1200mAh and 3600mAh. As a result of these battery capacities, the 20700 battery has more run time than a 18650 battery.

In conclusion, although batteries can be used interchangeably, it is important to ensure battery safety by carefully going through the guidelines and instructions attached to each as well as carefully study the device in order to avoid complications that can further lead to harm.

Amazon’s Best Selling Battery Testers!

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Bestseller No. 1

VTECHOLOGY 2Pcs Battery Tester Checker, Universal Battery Checker Model BT-168for AA AAA C D 9V 1.5V Button Cell Batteries Smal Electrical Equipment (Requires No Battery for Operation)

MULTI PURPOSE USE- can be used to test different type of household batteries like AA, AAA, C, D, 1.5V,9V and 1.5V button type
REQUIRE NO BATTERY- activated by the battery being checked, no battery needed for operation
SIMPLE BUT EFFECTIVE- compact size and lightweight, portable effective battery tester, a must buy for anyone who uses regular or rechargeable batteries on a regular basis
EASY TO USE- identify battery status simply by the analog display needle, "good" (green), "low" (yellow), and "replace/recharge" (red)
NOTE : 1. You can simply test battery voltage to determine whether the capacity of the battery is low or high. It won't directly detect the battery capacity precisely 2. Don't forget: The Battery Tester is activated by the battery being checked. Keep test times as short as possible to avoid unnecessary battery drain.

SaleBestseller No. 2

KONNWEI KW208 12V Car Battery Tester, 100-2000 CCA Load Tester Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Truck Marine Motorcycle SUV Boat

【Automotive Car Battery Tester】 As one of the most cost-effective products of KONNWEI, it's a perfect Christmas gift. KW208 can test all 12V 100-2000CCA batteries including regular flooded, AGM flat plate, AGM spiral, or gel batteries. Provide overall analysis of batteries’ health and help you know their status in advance before it dies. KW208 battery tester support cranking and charging system test also alternator and starter test.
【Display Overall Batteries Data】KW208 12V Battery Load Tester gives you the basic battery parameters such as voltage, internal resistance, cold cranking amp and AH capacity, battery health and charge status. Additionally, battery cca tester will also show you professional advice whether to replace or charge the battery.
【 >99.5% Accuracy】Thanks to KW208’s powerful and smart chip, it provides more than 99.5% precise testing reports within milliseconds(testing results refer to US Midtronics), greatly improved the testing speed compared to other battery testers.
【Plug and Play】 KW208 Battery load analyzer allows you to test batteries both in-vehicle and out-of-vehicle, and even test dead batteries. Just connect the tester’s clips with battery then it will turn on and ready to test and analyze battery. It’s that easy!
【Starter& Alternator Tester】KW208 not only a great battery load tester that tests batteries cranking & charging system but also can test alternator's charging and starter's cranking conditions. And it can switch up to 8 languages for different needs.

SaleBestseller No. 3

Battery Tester, Dlyfull LCD Display Universal Battery Checker for AA AAA C D 9V CR2032 CR123A CR2 CRV3 2CR5 CRP2 1.5V/3V Button Cell Batteries, 1x AAA Batteries Included

HIGH COMPATIBILITY: It is not only suitable for AA, AAA, C, CR123A, D, 9V, N, CR2, CRV3, 2CR5, CR-P2 cylindrical battery testing, but also good for checking a wide variety of button cell batteries
CRISP LCD SCREEN: Easy to use analyzer shows what you need to know about your battery’s health, it will accurately shows whether the battery is in poor, weak, or good condition of voltage.
QUICK RESULTS: Simply place a battery into the decent battery detector, it will shows you quickly the status of your batteries’ health by the using bars, helps you avoid battery damage from unnecessary recharges. DON'T POWERED BY RECHARGEABLE BATTERY NOR TEST RECHARGEABLE BATTERIES
REMARKABLY COMPACT: One of the smallest and lightest portable battery checker. A pocket-friendly compact chassis with an anti-slip finish enables a firm grip in your hand for battery checking.
WHAT YOU GET: Dlyfull Universal Battery Tester(1x AAA battery included), welcome guide, & our worry-free 18-month warranty and friendly customer service. A living assistant helps you save money as well as prolong the lifespan of all your batteries.

Bestseller No. 4

Dlyfull Battery Tester, LCD Display Universal Battery Checker for AA AAA C D 9V CR2032 CR123A CR2 CRV3 2CR5 CRP2 1.5V/3V Button Cell Batteries, 1x AAA Batteries Included

HIGH COMPATIBILITY: It is not only suitable for AA, AAA, C, CR123A, D, 9V, N, CR2, CRV3, 2CR5, CR-P2 cylindrical battery testing, but also good for checking a wide variety of button cell batteries
CRISP LCD SCREEN: Easy to use analyzer shows what you need to know about your battery’s health, it will accurately shows whether the battery is in poor, weak, or good condition of voltage.
QUICK RESULTS: Simply place a battery into the decent battery detector, it will shows you quickly the status of your batteries’ health by the using bars, helps you avoid battery damage from unnecessary recharges. DON'T POWERED BY RECHARGEABLE BATTERY NOR TEST RECHARGEABLE BATTERIES
REMARKABLY COMPACT: One of the smallest and lightest portable battery checker. A pocket-friendly compact chassis with an anti-slip finish enables a firm grip in your hand for battery checking.
WHAT YOU GET: Dlyfull Universal Battery Tester(1x AAA battery included), welcome guide, & our worry-free 18-month warranty and friendly customer service. A living assistant helps you save money as well as prolong the lifespan of all your batteries.

Amazon’s Best Selling Battery Power Banks!

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SaleBestseller No. 1

Miady 2-Pack 10000mAh Dual USB Portable Charger, USB-C Fast Charging Power Bank, Backup Charger for iPhone 15/14/13, Galaxy S23/22, Pixel and etc

【2023 Upgraded USB-C Output】Two 10000mAh battery packs not only for portable charging but also around the home. Allowing you to charge mobile devices without having to be tethered to a plug socket. Now USB-C charging is available, makes it easier to charge an iPhone or Android phones with USB-C cord. (Lightning cord is not included)
【Dual Output & Input】Each also has 2 USB output ports that detect all the connected devices and efficiently distributes the current output up to 5V 2.4A. The USB C and Micro USB ports can fully refill the battery itself in 5 hrs at 5V 2.0A.
【Small & Slim】It feels incredibly compact for a 10000mAh power bank, weighing just 218g and only 14mm thick. Grippy design is easy to hold, easy to toss into a bag and incredibly portable.
【Reliable Li-polymer Cell】Thanks to the Li-polymer battery pack, the charger is much safer than any Li-ion charger. Also, it's lighter and slimer that you can easily carry it around, even on airplanes.
【What You Get】2 * Miady 10000mAh USB Portable Charger (White & Black); 2 * USB Cable (Lightning cord is not included); 1 * User Manual. We provide 24*7 friendly customer support and also back our products for 18 months.

SaleBestseller No. 2

Portable-Charger-Power-Bank - 50000mAh Powerbank PD 30W and QC 4.0 Fast Charging External Battery Pack with USB-C LED 4 Outputs & 2 Inputs Portable Charging for iPhone 15 14 13 pro, Samsung

[50000mAh Portable Charger] : With the high capacity, you can charge your iphone smoothly. It offers 11 charges for iPhone 13 Pro, offers 8 charges for Samsung Galaxy S22.
[PD 30W Fast Charging] : Enerwow Power Bank With the upgraded PD 30W output and the latest QC4.0 fast charging technology, it can charge your iPhone to 55% in just 30 minutes.
[4 Outputs & 2 Inputs]: Mobile phone external battery pack is equipped with 1 USB-C interface and 3 USB-A interfaces, and also has an input interface that can charge 4 devices at the same time！
[Universal Compatibility] : Cell phone battery pack widely compatible with iPhone, Samsung, Google Pixel, Xiaomi smartphones and other devices such as earbuds, fitness, smartwatch, gopro camera. for iPhone 14 ,14Pro MAX,13,12, iPadair, Airpods, Samsung, Huawei and more.
[Safety Protection]: Multiple protection systems can fully protect your device and keep your power bank healthy, including overcharge protection, short circuit protection, overvoltage protection, overcurrent protection, etc.

SaleBestseller No. 3

LANMU Battery Pack Power Bank Compatible with Oculus/Meta Quest 3, 2,Quest, Quest Pro, and PICO 4 VR Headset, 5V 2A 3350mAh Lightweight Extra Battery Accessories for 1.5 Hours Playtime

Extend Game Time: The vr headset takes a lot of battery power to run, and with this battery pack,you can continue playing without worrying the headset is failing due to weak battery.Easy to get extra 1.5 hours play time, offering a better virtual reality experience.
Headphone Jack Access: Comes with 90 degree adapter, can help the power bank to avoid blocking the audio jack and enable to use the headphone at the same time.
Slim and Compact: Input: 5V 2A, output: 5V 2A, slim design and light weight, 3350mAh portable power bank is only 135g. It doesn't add any significant weight to your Oculus Quest 2, better experience than heavy power bank and long link cable.
Safe and Fast Charging: Passed IEC 62133-2 and IEC 62368-1 test, it can offer overcharge protection, short circuit protection, over current protection, over voltage protection and more.
Perfect Compatibility: Works well with Meta Quest 3, Quest 2, Quest, Elite Strap, PICO 4 and other headset with type c connector. (Note:1. Please ensure that the pwoer bank has been charged fully before using, and we suggest to use it when your headset's battery at 50%, not recomend to plug it into when oculus is drained. 2.Provided 180 days no reason to return service.This must be the one you are looking for)

Bestseller No. 4

2 Pack 18650 Battery Charger Protection Module, MELIFE Power Bank PCB Module Board, Dual USB 5V 1A 2.1A with BMS Protection DIY Mobile Charging Accessories Digital LCD Display Indicator

Designed for 18650 battery DIY power bank: The battery of the 18650 battery must be flat, and the length is 65MM. The pointed battery cannot be used. If you are using old batteries, different capacities, different brands are not available, the assembled battery is guaranteed to be at least 3.5V per voltage. If the voltage is too low, it will not be charged. (It also support lithium battery, mobile phone battery and tablet battery).
Supported connection methods: It is possible to connect only one lithium battery or multiple lithium batteries in parallel. The capacity of connected battery is no more than 200,000 mAh, As long as the battery with a voltage of 3.0-4.2V can be used.
Charge indication of this power bank pcb board: The word "IN" will be shown in the display; Output indication: Long press the LED button after turning on the load, Start output, The word "OUT" and the current and voltage of 5V 1.0A or 5V 2.1A will be displayed in the display.
This is a mobile powerbank module with Protection Function: The protection circuit of the boosted lithium battery has been integrated, prevent over-discharge, over-charge, overload short circuit protection, over current protection, and over temperature protection. Note: The positive pole of the battery is connected to B+ and the negative pole is connected to B-, do not reverse it. If it is reversed, it will burn out!!!!
Why can't continue charging when charging capacity is 99%? You just assembled the battery, why the display percentage is not accurate, the battery power is only 50%, but it shows 80% after assembly?--Whether you are using a new battery or an old one all need to be discharged before use(charge your mobile phone), then turn it off charge it once gain. If it still cannot be solved, it is caused by large internal resistance and inconsistent capacity.

Last update on 2023-11-04 / Affiliate links / Images from Amazon Product Advertising API

20700 vs 18650 – Difference Between 20700 Battery and 18650 Battery

20700 vs 18650 Battery

Definitions for 20700 battery and 18650 battery

Differences Between 20700 and 18650 Batteries

Amazon’s Best Selling Battery Testers!

Amazon’s Best Selling Battery Power Banks!

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