Skip to content

20700 vs 18650 – Difference Between 20700 Battery and 18650 Battery

20700 vs 18650

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 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

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!

Check out the great customer reviews!

Bestseller No. 1
2 Pack Battery Tester, Universal Battery Checker for AA/AAA/C/D / 9V / 1.5V Button Cell Batteries
10,144 Reviews
2 Pack Battery Tester, Universal Battery Checker for AA/AAA/C/D / 9V / 1.5V Button Cell Batteries
  • EASY TO USE - Calibrated scale to quickly identify "good" (green), "low" (yellow), and "replace/recharge" (red) battery status.
  • PACKAGE CONTENT - 2 Pack battery tester, Opp bag. Weight light and easy to carry.
  • 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.
  • PRODUCT SPECIFICATIONS - Weight: 3.5 ounces. Dimensions: 4.3*2.4*0.98 in.
  • NOTE - 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 Car Truck Marine Motorcycle SUV Boat
4,559 Reviews
KONNWEI KW208 12V Car Battery Tester, 100-2000 CCA Load Tester Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Car 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
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)
15,290 Reviews
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. 4
OTC 3181 130 Amp Heavy-Duty Battery Load Tester Black
622 Reviews
OTC 3181 130 Amp Heavy-Duty Battery Load Tester Black
  • Ergonomically designed heavy-duty battery tester provides accurate reliable test results in just 10 seconds
  • Includes uniquely designed clamps for a positive grip on top and side post batteries and an extra large
  • Extra large display with zero adjust
  • Works on both 6V and 12V batteries
  • Side tabs for on-tool clamp storage and back brackets for tool storage on wall or toolbox

Amazon’s Best Selling Battery Power Banks!

Check out the great customer reviews!

SaleBestseller No. 1
LOVELEDI Portable-Charger-Power-Bank - 2 Pcs 15000mAh Dual USB Power Bank Output 5V3.1A Fast Charging Portable Charger Compatible with Smartphones and All USB Devices
8,642 Reviews
LOVELEDI Portable-Charger-Power-Bank - 2 Pcs 15000mAh Dual USB Power Bank Output 5V3.1A Fast Charging Portable Charger Compatible with Smartphones and All USB Devices
  • Portable Chargers are very compact ,they are not only for portable charging but also around the home making it a favorite for travel.You could benefit from these battery packs When you go out.Allowing you charge mobile devices without having to be tethered to a plug socket. You could get more convenience and happiness from these high-quality power banks.
  • Power Bank has 15000 mAh ultra-high capacity can give you an excellent battery life experience. Keep Your phone running all day.Without extra worry about low phone battery.
  • Portable Charger with 5V 3.1A 2 USB Output ports ,which can fast charge 2 devices at the same time.You can share with your companions to get rid of worries about the remaining battery power of your phone. The USB C and Micro USB input ports can fully refill the battery itself in 4-5 hrs at 5V 2.0A.(Note: Type-C port can only input, does not support output)
  • Power bank uses the safe high-density lithium polymer battery module, which is more compact and has a larger battery capacity, It exceeds the traditional Lithium ion battery on safety.The safety of customers is our most concerned about ,Customer satisfaction is our greatest motivation. We sincerely hope that this shopping experience will bring you good memory.
  • Power bank bulit-in Intelliegent Controlling IC can automatically identify and is universally compatible with all products, It switches the corresponding current and voltage to charge the device. Also IC can convert fluctuating current into stable current, It can effectively prevent your power bank overcharge, overvoltage, overcurrent and short circuit.Bring you the safe using experience.
Bestseller No. 2
iWALK LinkPod Portable Charger 4800mAh Power Bank PD Fast Charging Small Docking Battery with LED Display Compatible with iPhone 14/14 Pro Max/13/13 Pro Max/12/12 Pro/11/X/8/7/6,Pink
3,964 Reviews
iWALK LinkPod Portable Charger 4800mAh Power Bank PD Fast Charging Small Docking Battery with LED Display Compatible with iPhone 14/14 Pro Max/13/13 Pro Max/12/12 Pro/11/X/8/7/6,Pink
  • Fast Charging: Built-in Lightning cable supports delivering max 12W to iPhone.Charging iPhone 13 from 20% to 60% just in 30 mins.
  • 18W PD Fast Recharging:USB-C Input Supports 18W PD quick speed charging, only takes 1.5h to fully recharge this portable charger.
  • LED Display:LED display shows current power left, no more guessing whether need to charge it or not.
  • High Capacity: Light weight but big Capacity, an ideal charging companion for short travel,4800mAh is big enough to fully charge your iPhone 13 Pro 1 time.
  • What you get:iWALK 4800mAh power bank*1,USB-C to USB-C cable*1,USB-A to USB-C adapter*1,Manual*1 , 1 year warranty and friendly customer service.
SaleBestseller No. 3
LILIO Portable Charger, 20000mAh Power Bank with Digital Display, 20W Fast Charging Battery Pack with USB C/USB A Output, Cell Phone Charger for iPhone 14/13 Samsung Pixel AirPods and More
1,609 Reviews
LILIO Portable Charger, 20000mAh Power Bank with Digital Display, 20W Fast Charging Battery Pack with USB C/USB A Output, Cell Phone Charger for iPhone 14/13 Samsung Pixel AirPods and More
  • Ultra-Fast Charging - Up to 20W amazing charging speed is twice as fast as ordinary portable chargers, only 30 minutes charge 50% for iPhone 14 to away from long waiting time. Supporting PD3.0/QC2.0/QC3.0/AFC/FCP protocol to provide tailored for different electronic devices.
  • LED Digital Display - Power levels can be monitored at any time by pressing a separate button on the side. Minimalist and elegant LED digital large screen display the battery power even accurately to 1%.
  • Dual Port Design - Equips with a USB-C input/output port and a USB-A output port to juice up your 2 devices simultaneously or goes to share 20000mAh power with best friends/families. The dual port design is compatible with most electronic devices on the market like various cell phones, headphones, tablets, etc. (The Micro USB Port is only for charging the power bank)
  • Cozy Touch - Each premium material has been carefully selected. The unique frosted surface integrates with exquisite grain not only anti-scratch but also brings you a cozy touch and lets you enjoy the feeling to hold it.
  • Perfect Carry Size - As one of the slimmest and lightest 20,000mAh rechargeable batteries pack, its size is only 139*67*16.5mm and weighs 235g, even smaller than the average smartphone. Easily put it into your pocket, bag, or luggage, and keep your electronic devices alive anytime and anywhere!
Bestseller No. 4
Anker Portable Charger, 325 Power Bank (PowerCore Essential 20K) 20000mAh Battery Pack with USB-C (Recharge Only) and PowerIQ Technology for iPhone, Samsung Galaxy, and More
74,681 Reviews
Anker Portable Charger, 325 Power Bank (PowerCore Essential 20K) 20000mAh Battery Pack with USB-C (Recharge Only) and PowerIQ Technology for iPhone, Samsung Galaxy, and More
  • Ultra-High Cell Capacity: The massive 20,000mAh cell capacity provides more than 5 charges for iPhone XS, almost 5 full charges for Samsung Galaxy S10, more than 4 charges for iPhone 11, and over 2 and a half charges for iPad mini 5.
  • Advanced Charging Technology: Anker's exclusive PowerIQ and VoltageBoost technology combine to deliver an optimized charge to your devices, while the trickle-charging mode is the best way to charge low-power accessories.
  • Simultaneous Charging: Twin USB ports allow you to charge two devices at the same time. The USB-C port cannot charge other devices.
  • Versatile Recharging: With both a USB-C and Micro USB input port, you have more options over how you recharge. Recharging PowerCore with a 10W charger will take approximately 10.5 hours, while recharging with a 5W charger will take approximately 20 hours.
  • What You Get: Anker 325 Power Bank (PowerCore 20K), Micro USB cable (to charge the power bank), welcome guide, our worry-free 18-month warranty, and friendly customer service. (USB-C cable, Lightning cable, and wall charger not included)

Last update on 2023-05-28 / Affiliate links / Images from Amazon Product Advertising API