Best 18650 Capacity Tester in 2023 (Top 10 & Buying Guide)

Sometimes it might be quite difficult to find the best 18650 capacity tester. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this 18650 capacity tester buying guide.

Our Favorite Picks:

The 10 Top 18650 Capacity Tester Reviews:

Bestseller No. 1
4-Bay 18650 Battery Charger, Test Battery Capacity, LCD Display, Fast Charging, Universal Battery Charger for 3.7V 26650 18650 18350 20650 14500 18500 1.2V AA AAA C SC Size Batteries
  • 18650 charger For Different Types Of Batteries: 3.7V:18650,26650,22650,20700,18490,18500,18700,17335,17670,17500,16340 ,14500, 10440 , 14650, 25500,32650,1.2V NiMH/Cd: AA, AAA,SC, C Size.
  • This Fast Universal Battery Charger adopts one screen independent LCD display, and the operating mode (charge and test), battery voltage (V), working current (MA), charging time (H), battery capacity (MAH) and power percentage (%) are clear at a glance.
  • This is a high-end intelligent fast charger, which has the functions of key control / 4-channel independent charging / battery capacity detection / anti reverse connection / short-circuit protection / overcharge protection / USB 5v1A output(power bank) and battery zero voltage activation function, also it can automatically and timely monitor battery charging and discharging and detection process.
  • In test mode, the normal battery capacity test process consists of three steps (1. Fully charged, 2. Then discharged fully, 3. Fully charged);Charge mode and test mode can work at the same time; charging capacity test / normal capacity test function can be set independently, without separate discharge test function.
  • Note:The charger can only charge cylindrical lithium-ion battery and Ni-Mh battery, but not LiFePO4 battery;Before use, please refer to the manual carefully and pay attention to the recommended charging current of the charging battery, and do not exceed the recommended charging current
Bestseller No. 2
LiitoKala Lii-M4S Battery Charger for 26700 18650 26650 21700 AA Touch Button LCD Display Test The Battery Capacity
  • Touch button Lii-M4S adopts the design of touch buttons, and it will send out a "beep" sound feedback when touched. Responsive and easy to operate.
  • Test battery capacity Press "MODE" key to select "TEST" mode. It takes some time to test the battery capacity, please be patient.
  • STORAGE Mode Charge the battery voltage to 3.8V or discharge the battery voltage to 3.8V.When the battery is stored for a long time, 3.8V voltage is good for the battery.
  • For Battery For Li-ion 3.7V and NiMH/Cd 1.2V ; 26650, 26700, 21700, 18650, 17670,18490, 17500, 14500,14650, AA, AAA, C
Bestseller No. 3
Lithium Battery Capacity Tester XH M239 Li Ion Battery 18650 High Accuracy Capacity Tester Module Mah and Mwh Digital Display Measurement for 18650 XH M239
  • CLEAR DISPLAY: The liquid crystal display is clear and can display the discharge capacity and discharge energy
  • ACCURATE AND INTELLIGENT: Intelligent chip control, bring accurate measurement, support parameter memory function, easy to check next time
  • DURABLE AND CONDUCTIVE: Excellent electronic components are used, which are sturdy and durable, with good conductivity and long service life
  • EFFICIENT AND TIME SAVING: Dual working power supply, possess high working efficiency, save your time
  • TEST PARAMETERS: This battery capacity tester is used to test the voltage, discharge capacity and discharge energy of 18650 lithium batteries
Bestseller No. 4
AITRIP 1PCS 1.2-12V Battery Capacity Meter Discharge Tester 18650 Li-ion Lithium Lead-Acid Battery Capacity Meter Discharge Tester Analyzer
  • Material: Electrical components
  • Maximum support 15V 3A discharged through the discharge voltage and current, itself does not discharge.
  • Maximum battery capacity range: 9999Ah (1Ah=1000mAh)
  • In order to improve the voltage measurement accuracy, this circuit is specially designed with DC bias. When the terminal is not connected, a small voltage will be displayed, which does not affect the actual measurement. If you short the input terminal (absolute 0V), 0 will be displayed.
  • Note: During the discharge using resistors, the resistive load will generate severe heat. Please pay attention to safety!
Bestseller No. 5
XTAR Dragon VP4 Plus Professional 18650 Capacity Tester Universal 18650 Charger for Rechargeable Batteries Li-ion 21700 26650 14500 16340 Ni-MH Ni-Cd AA AAA D
  • 【XTAR Dragon VP4 PLUS Professional Battery Charger 】XTAR Dragon 4-bay battery charger is fully compatible with: Li-ion / IMR / INR / ICR (3.6V/3.7V): 10440 14500 14650 16340 17335 17500 17670 18350 18490 18500 18650 18700 20700 21700 22650 25500 26650 32650 1.2V Ni-MH / Ni-CD: AAAA AAA AA A SC C D/11.1V/3S Battery Pack (Note: Cannot charge protected 20700/21700 batteries)
  • 【D Battery Charger,Adjust the current manually】 Optional charging currents maximize the battery lifespan,0.5A/1.0A/2.0A optional charging currents by manual,and you can charge four 32650/D size batteries at the same time
  • 【Test Battery Capacity】:switch to test mode, you could accurately test the real capacity of the battery by the process(charge-discharge and charge again)
  • 【Personal Battery Doctor】with probes, XTAR DRAGON VP4 Plus charger can precisely measure the voltage and internal resistance of your battery as a multi meter
  • 【Output Function】XTAR DRAGON charger with max 2.4A output current can intelligently provide suitable output currents to different external 5V USB devices
SaleBestseller No. 6
WISSBLUE 18650 Battery Charger, LCD Screen Can Display Capacity, 2a Fast 18650 Charger, Suitable for 3.7v Lithium Battery and 1.2v Ni-Mh/Ni-Cd AA AAA Battery
  • 【WIDE COMPATIBILITY】: The Fast 18650 Charger Is Compatible With All 3.7v Lithium Batteries And 1.2v Nimh/Nicd Aa Aaa Batteries. Smooth And Durable Stainless Steel Rails For Cell Lengths From 34mm To 75mm
  • 【SMART LCD DISPLAY】;Lcd4 18650 Charger Monitors Detailed Real Battery Condition, Time Per Charge/Charging Capacity, Battery Voltage, Charging Progress %, Battery Type, Charging Speed To Identify The Real Capacity Of The Battery
  • 【SAFELY ADJUST CHARGING SPEED】: Switch Between Slow/Medium/Fast Charging As Needed, Shorten Charging Time By Up To 35%, Intelligent Circuit To Prevent Short Circuit, Overheating, And Overvoltage,Automatic Stop When Full
  • 【18650 BATTERY CHARGING TIME】: 2.3 Hours Full Lithium Ion Panasonic Ncr18650b 3400mah, 3.5 Hours Full 21700 Battery 5000mah, 0.5 Hours Full Amazonbasics 800mah AAA Battery,1.5 Hours Full Eneloop 2500mah AA, 1.5 Hours Full 3.6v 2500mah Lithium Ion High Power Consumption Lg He2
  • 【UNIVERSAL CHARGER】: Universal Usb Interface, You Can Use Solar Charger, Mobile Power, Computer, Car Charger, Usb Wall Charger, Etc. To Charge 18650 Batteries Anytime And Anywhere. Best 18650 Battery Charger 4 Slots, Suitable For Home Or Outdoor
Bestseller No. 7
Universal Battery Checker Tester with Leads LCD Display, Battery Capacity Voltage Resistance Tester for AAA AA C D 9V Digital 12V 3.7V Li-ion 18650 CR123A CR2032 Button Cell Batteries More
  • HIGH COMPATIBILITY: This digital battery tester fit for all common batteries from small to large- AAAA, AAA, AA, A, C, SC, D, 9V, 3.7V 10440,18650, CR2, CRV3, 2CR5, A13, various button cell(LR621, CR2032)etc.; perfect household battery tester for disposable and rechargeable batteries
  • CLEAR LCD SCREEN: Easy to read the state of your battery, it will analyze whether your battery is good or not or whether they need to be charged; compact and lightweight tool, portable handheld tester
  • MULTI-FUNCTIONAL TESTER: This battery checker can not only detect battery capacity percentage level precisely, but measure the voltage and internal resistance of household battery, equal to simple multimeter. Capacity percentage indicates battery power is high or low, and resistance reflects whether battery quality is good or not, smaller resistance, better battery
  • EASY TO USE: Just switch corresponding voltage and use leads to test, no need to insert battery into slot; the digital tester will quickly show the status of your batteries’ health, helps to avoid battery damage from overcharging. POWERED by 2 NON-RECHARGEABLE AAA ALKALINE BATTERIES
  • WHAT YOU GET: Dlyfull universal battery checker tester (2 AAA batteries not included), 24hrs freindly customer service and 100% unconditional return or refund if any quality problem
SaleBestseller No. 8
LiitoKala Lii-500 Battery charger for 18650 26650 AA AAA battery LCD display test the battery capacity
  • battery types Supports:1.2V Ni-MH / Ni-CD to 3.7V Li-ion battery.For AA AAA 18650 26650 18490 18350 17670 17500 16340 RCR123 14500 IMR 10440
  • Test the battery capacity: Long press the Model key to select the Nortest mode, the charger will automatically complete the test. You only need to wait for the result.
  • How long need charging? : The charger has 300mA/500mA/700mA and 1000mA charge current. 2000mA battery, using 1A charging current, about 2.5 hours full. Other battery charging times are calculated like this.
  • Safety: The Lii-500 charger features “reverse battery protection, high temperature protection, overcharge protection and over discharge protection”. It is a safe and reliable chargers, please rest assured that use.
  • Quality assurance:We offer 12 months.Please contact me if you have any questions during use. Buying a charger is the beginning and our service is not terminated.
Bestseller No. 9
HELYZQ 168Max Universal Digital Battery Capacity Tester for Lithium 18650 AA 9V Button
  • 1. 100% brand new quality
  • 2. Type: Battery Tester
  • 3. Material: ABS
  • 4. Test micro battery
  • 5. Check the charge of all 1.2V~4.8V and 9V batteries
Bestseller No. 10
Battery Charger Analyzer Tester for Li-ion NiMH NiCd Rechargeable Batteries C3400 BT-C3400 AA AAA C 18650
  • Charger Tester Analyzer For Li-ion (Lithium ion) NiMH or NiCd rechargeable batteries.
  • Four indepentent channels can be programmed individually or all together. Charge, discharge, condition or analyze one to four Li-ion, NiMH or NiCd rechargeable batteries.
  • Adjustable charging rate from 200 to 2000 mA. (1000 mA max 4 channels) Negative delta V (-dV) full charge detection for NiMH/NiCd. CC/CV for Li-ion rechargeable cells.
  • Back lighted LCD Digitally displays capacity, voltage, time elapsed and current. Five modes of operation for each channel: Charge: Discharge: Discharge Refresh: Charge Test: Quick Test:

Last update on 2023-03-25 / Affiliate links / Images from Amazon Product Advertising API

How to find the best 18650 capacity tester?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best 18650 capacity tester for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good 18650 capacity tester recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the 18650 capacity tester need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for 18650 capacity tester to find what you’re looking for:


In some cases, the brand of 18650 capacity tester is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.


The features in any given 18650 capacity tester are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.


Customer reviews about 18650 capacity tester are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.


Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare 18650 capacity tester quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.


Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.


The quest to find the best 18650 capacity tester can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.