Tester Battery Capacities 18650 of 2025
Best Choice1
KOOBOOKKOOBOOK 1Pcs Type-C 18650 Lithium Battery Capacity Tester 8 Channel MAh MWh Digital Battery Power Detector Module 18650 Battery Internal Resistance Tester Support Automatic Charge Discharge
Main highlights- Working voltage: DC5V 10A (standard bare metal, without power supply), overpressure must burn machine.Power supply reverse protection,prohibit reverse power supply
- The blue segment at the upper end is the external discharge terminal, and the lower end has the working indicator of the corresponding channel.U-shaped groove at the back is combined with PCB board, and the fan actively dissipates heat to form a heat dissipation channel
- Only support charging-discharging-charging 1 cycle in automatic mode, do not support multiple cycles. support external test,can be discharged through the 2P terminal external, a single channel single time only and can only support the battery holder or external test in one, can not be used at the same time the battery holder and external battery test
- 8 independent channels, each unrelated, independent operation, without mutual influence.support 8 channels to set up synchronisation, also can set up each channel parameter individually
- 18650 battery holder using compact battery holder, suitable for flat battery measurement.Voltage and current curve display, real-time voltage and current, DC two-wire method to measure internal resistance, only for the same batch sorting analogy
9.8Exceptional
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Value for Money2
DWEIIDWEII 2PACK 18650 Lithium Battery Capacity Tester Module MAh MWh Digital Battery Power Detector Module 18650 Battery Tester Type-C (4 Channel)
Main highlights- The 1.77 inch screen simultaneously displays information such as internal resistance, capacity, voltage, current, and battery level, providing comprehensive data for analysis
- Supports four-channel capacity and internal resistance measurement.
- Measurement parameters: Working voltage: DC5V;Detection voltage: less than or equal to DC5V;Capacity measurement range: 0~99999mAh;Battery internal resistance measurement: support;Measurement error is about 10%;Display real-time voltage/power/current: support;Discharge load: 10W.
- Applications：The 18650 battery capacity tester is specially used to check the capacity, internal resistance, voltage, current, power and other information of the 18650 battery.The integration of charge and discharge saves the tedious operation of disassembling and assembling the battery when replacing the equipment。
- 2PACK18650 Battery Capacity Tester LCD Display Digital Automatic Charge and Discharge Internal Resistance Tester MAh MWh Lithium Battery Type-C Port Tester with Type-c to USB Cable
9.5Excellent
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3
DWEIIDWEII 1pcs 18650 Lithium Battery Capacity Tester Module MAh MWh Digital Battery Power Detector Module 18650 Tester Type-C (4 Channel)
Main highlights- The 1.77 inch screen simultaneously displays information such as internal resistance, capacity, voltage, current, and battery level, providing comprehensive data for analysis
- Supports four-channel capacity and internal resistance measurement.（(User manual available if do as follow: click "DWEII"(you can find "Sold by DWEII" under Buy Now button), in the new page, click "Ask a question".)we will send you the manual asap）
- Measurement parameters: Working voltage: DC5V;Detection voltage: less than or equal to DC5V;Capacity measurement range: 0~99999mAh;Battery internal resistance measurement: support;Measurement error is about 10%;Display real-time voltage/power/current: support;Discharge load: 10W.
- Applications：The 18650 battery capacity tester is specially used to check the capacity, internal resistance, voltage, current, power and other information of the 18650 battery.The integration of charge and discharge saves the tedious operation of disassembling and assembling the battery when replacing the equipment。
- 1pcs 18650 Battery Capacity Tester LCD Display Digital Automatic Charge and Discharge Internal Resistance Tester MAh MWh Lithium Battery Type-C Port Tester with Type-c to USB Cable
9.4Excellent
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4
EBLEBL 18650 Battery Charger with Discharge & Testing Functions, Lithium Battery Charger for 3.6V/3.7V/3.85V Li-ion/IMR/INR/ICR/3.2VLiFePO4, 1.2V Ni-MH/Ni-CD Rechargeable Batteries
8.7 worth the money8.4 Simple to use8.4 Charging powerWhy we love it
Supports multiple battery types.
Fast charging with four slots.
Real-time LCD charge information.
9.2Excellent
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5
ZORZA12% OffZORZA 1Pcs Type-C 18650 Battery Capacity Tester Lithium Battery Internal Resistance Tester 4-Channel Automatic Charge Discharge Module for Flat Ends 18650 Batteries
Main highlights- This battery tester operates on a DC5V power supply and is equipped with dual Type-C ports (power cord not included, compatible with C-type phone cables). It utilizes a direct current two-wire method for internal resistance measurement and provides status indicators. It also offers high-temperature protection and active heat dissipation.
- The compact design of the 18650 battery holder supports flat top batteries and allows for easy measurement (compatible with batteries with discharge voltage between 2.5V and 3.5V, and charging voltage at 4.2V).Please note automatic charging and discharging function is not suitable for lithium iron phosphate batteries.
- Switching between Chinese and English interface: Press and hold the "Menu/M" button while powering on. Release the button when the screen lights up. After turning on, wait for 10 seconds before disconnecting the power. When powered on again, the language switch will be completed.
- Our battery tester supports independent 4-channel internal resistance and capacity measurements, allowing you to accurately assess your batteries.
- It features a charging function with automatic cutoff when the batteries are fully charged, ensuring their safety and longevity.The discharge function automatically stops when predetermined conditions are met, preventing over-discharging.In automatic charging mode, it supports up to 9 cycles of charging and discharging, optimizing battery performance.
9.1Excellent
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6
ImrenIMREN 18650 Capacity Tester,18650 Battery Charger with Discharge & Testing Function, 21700 Battery Charger with LCD Screen Display Capacity Suit for 18650 21700 20700 1.2V Ni-MH/Ni-CD LiFePO4 Battery
Main highlights- 【What You'll Get:】 - 1 IMREN 4 bay 3.7V/1.2V battery charger, 1 AC cable,1 Car Charger, user manual, (Do not charge non-rechargeable batteries.)
- 【Practical slot and smart LED】- Short press "SLOT" to view C1, C2, C3, C4, the information displayed on the current screen is the charging status information for each channel. This 21700 battery charger with large screen can show charging capacity, battery voltage, percentage, charging time, easily to understand the charging datum. The 18650 battery charger LCD back-light will become dark after 30 sec. without any operation
- 【C4 Channel 18650 Battery Tester】-Put the 18650 battery into the charger's C4 channel,then Press SLOT and MODE both keys for 2 seconds till flashes.After 5 seconds,it will automatically enter Battery Capacity Analysis Mode.In this mode,the battery is first fully charged,and then discharged at a constant current of 500mAh.After a cycle process of charging and discharging, the capacity of the corresponding battery is displayed on the screen. (only for the C4 channel 18650 battery tester)
- 【Automatic LCD Display】- This is a smart 18650 battery charger with LCD Display, Automatically adjust and choose the best charging current for different batteries to maximize battery life, also could automatically detect Li-ion and Ni-MH batteries at same time or separately. Comes with a car adapter, easily charge your 18650 batteries in your big truck
- 【18650 Battery Charger】- the Battery Charger suit for IMR / Li-ion(4.2V / 4.35V) / LiFePO4(3.6V) 10340 / 10350 / 10440 / 10500 / 12340 / 12500 / 12650 / 13450 / 13500 / 13650 / 14350 / 14430 / 14500 / 14650 / 16500 / 16340(RCR123) / 16650 / 17350 / 17500 / 17650 / 17670 / 18350 / 18490 / 18500 / 18650 / 18700 / 20700 / 21700 / 22500 / 22650 / 25500 / 26500 / 26650 Ni-MH / Cd(1.48V) A AA AAA AAAA C SC.(Support car charge, Includes Car Adapter)
- 【1000mA*4pcs 18650 Battery Charger】- The battery charger with 4 individual speedy charge slots, and the charge current 1000mA*4pcs 18650 Battery. The Charger can Charge 4PCS 3000mAH 18650 batteries at the same time in just 3 hours;The 18650 charger Input：AC 110-240V 50/60Hz, DC 12V
9.0Excellent
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7
SUNLYTOUR21700 18650 Battery Charger with Capacity Test Function,21700 Battery Charger 21750 18650 Charger with Capacity Test for 20700 22700 26650 26700 16340 (RCR123) Ni-MH Rechargeable
Main highlights- Universal Safe Certificate:This charger has passed CE,UKCA,PSE,FCC test,and got the certificate.In the meantime,it also passed ROHS,means it is a environment friendly product.
- Smart Charger Design:Press Button A,you can switch the charge current to0.5A, 1A and 2A.Note:Ni-MH Battery,only 0.5A.Press C to view C1 and C2,LCD will show the status of the charging battery.
- Important Warm Tips:CR123A is Non-rechargeable,please don’t charge it.Before charge,please check your battery.If broken,please don’t try to charge it.Before usage,please refer to the user manual.
- Great Compatibility Advantage:With 75 mm slots,this charger can support 26700 21700 22700 20700 17670 battery,even these battery has PCB protection board.Of course,this charger can also support 22750 21750 18650 22650 26650 14500 14650 16340 (RCR123) 16650 17500 17650 18490 18500 1.2V Ni-MH Ni-CD AA AAA AAAA C SC F6 Li-ion IMR INR ICR Rechargeable Batteries(Battery Excluded)
- Discharge Battery Capacity Test:Only on left slot,this function can only test cylindrical Li-ion battery,Ni-MH battery.Before test,please make sure your battery is new and good.Never test old or broken battery.But because of the charger volume limit,the test outcome would not be so precise.So please never take it as a laboratory test report,but just a reference.(Battery Excluded)
8.8Very Good
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8
DWEII2PACK 18650 Lithium Battery Capacity Tester Module MAh MWh Digital Battery Power Detector Module 18650 Battery Tester Type-C
Main highlights- ❃❃This battery capacity tester is mainly used for test the capacity of 18650 battery
- ❃❃Supply Voltage: DC5-12V lithium battery (not include)；Measurement Accuracy: 1mAH；Standby Current: 5mA；Discharge Current: About 500mA；Load Power: 10W 8Ω
- ❃❃LCD Display: The 1.77in screen displays internal resistance, capacity, voltage, current, power and other information at the same time.
- ❃❃(User manual available if do as follow: click "DWEII"(you can find "Sold by DWEII" under Buy Now button), in the new page, click "Ask a question".)we will send you the manual asap）
8.7Very Good
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9
DKARDUDKARDU 18650 Battery Capacity Tester LCD Display Digital Automatic Charge and Discharge Internal Resistance Tester MAh MWh Lithium Battery Type-C Port Tester with Type-c to USB Cable
Main highlights- Working mode: The 18650 battery capacity tester is divided into three modes, which are automatic mode (AUTO), discharge mode (DSG), and charge mode (CHG).Select the corresponding mode after power on.
- What it does:The 18650 battery capacity tester is specially used to check the capacity, internal resistance, voltage, current, power and other information of the 18650 battery.The integration of charge and discharge saves the tedious operation of disassembling and assembling the battery when replacing the equipment。
- Note: Charging and discharging 18650 battery compartment and type-c discharge interface cannot be tested at the same time.
- Measurement parameters: Working voltage: DC5V;Detection voltage: less than or equal to DC5V;Capacity measurement range: 0~99999mAh;Battery internal resistance measurement: support;Measurement error is about 10%;Display real-time voltage/power/current: support;Discharge load: 10W.
- Chinese and English interface switching: First,Shut down;Second,Press and hold the "menu" button to turn on the machine, release the button after the screen lights up, wait 10 seconds to turn off the machine after turning;Third,Reboot to complete the switch.
8.6Very Good
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10
RQG18650 Battery Capacity Tester, Lithium Battery Internal Resistance Tester, 4 Channel Automatic Charge Discharge Module Lithium Battery Power Meter with Dual Type-C Interface, Color Digital Display
Main highlights- NOTE: Capacity is measured only after the discharging is finished
- High-Accuracy Internal Resistance Measurement: Lithium battery tester internal resistance tester uses DC two-wire method for accurate resistance values, especially when batteries are fully charged
- Flexible Charging & Discharging Modes: 18650 battery capacity tester allows separate charging and discharging, with automatic mode supporting up to 9 cycles for thorough battery analysis
- Automatic Cut-Off Function: Battery tester for capacity power internal resistance stops fully automatic charging and discharging when conditions are met, with 1 to 9 adjustable cycles for tailored testing
- Applicability: Battery capacity tester designed for testing 18650 lithium batteries, NOT working with LiFePO4 battery for charging
- 4 Channel Independent Testing: 18650 battery capacity tester supports separate capacity & internal resistance measurement for each channel, ensuring precise testing without interference, with a color display of real-time results in mAh/mWh for easy monitoring battery performance
- 11 Adjustable Discharge Voltages: 18650 battery capacity tester provides 11 levels (2.5V to 3.5V) for precise control of discharge termination voltage to suit various battery types
8.4Good
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