18650 Battery Checkers of 2025
Best Choice1
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
9.6Exceptional
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Value for Money2
DLYFULLDlyfull Battery Tester, LCD Display Universal Battery Checker for Ni-MH, Ni-CD, Li-ion, Alkaline, 1.5V/3V Button Cell Batteries(AAA AA C D 9V 18650 CR123A LR44 CR2032 Cells), Cable Included
Main highlights- WHAT YOU WILL GET: Dlyfull-DB1 battery health tester & checker, USB-C cable (No Adapter !), welcome guide, 18-month warranty, and lifetime 24-Hour friendly customer service
- SMART LCD DISPLAY: The precise digital battery tester shows what you need to know about your battery voltage and health, accurately indicating whether the voltage is good, weak, or poor
- ONE-TOUCH, EASY TO USE: Press the V-SELECT button briefly to power on and cycle through battery types. Quickly double press to turn the buzzer on/off. Long press to power off
- MAGNETIC BATTERY SLOT: Simply place the battery into the battery checker tester and slide the magnetic slider to secure it firmly. No worries about slipping, easily test with one hand
- HIGH COMPATIBILITY: Universal battery tester for 1.2V Ni-MH/CD, 1.5V Alkaline, 3.0V Lithium, 3.7V Li-ion, 9.0V; Supports AAA AA C SC D N sizes, button cells, CR123A, CR2032, LR44, 18650 and more, offering versatile compatibility for various applications
- COMPACT & LONG BATTERY LIFE: Rechargeable household battery tester with USB-C input. Full charge lasts up to 15 hours, no need for frequent Power supply battery changes. Portable and easy to store
9.5Excellent
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3
DLYFULLDlyfull Battery Tester, LCD Display Universal Battery Checker for Ni-MH, Ni-CD, Li-ion, Alk & LiFe04 Batteries(AA AAA C D 9V 12V 18650 CR123A 2CR5 CR2032 Cells), 2X AAA Batteries Included
Main highlights- WHAT YOU WILL GET: Dlyfull-B4 Battery Health Tester & Checker, 2 Alkaline 1.5V AAA Batteries, Welcome Guide, 12-Month Warranty, and Lifetime 24-Hour Friendly Customer Service
- SMART LCD DISPLAY: The digital battery tester features a sophisticated LCD display screen that showcases the voltage and battery level of the tested battery; The battery level is presented in two formats: as a percentage and battery level bar display, providing clear and precise information about the battery's status
- ROBUST COMPATIBILITY: Universal battery tester is compatible with 12 battery types, including 1.2V Ni-MH/1.45V Zinc Air/1.5V Alkaline/3.0V Lithium Manganese/3.2V LiFePO4/3.7V Li-ion/6.0V, 9.0V, and 12.0V Alkaline packs ect; It supports AAA AA C SC D N sizes, button cells, CR123A, CR-V3, 2CR5, 23A, 27A, and more, offering versatile compatibility for various applications
- PORTABLE & EASY TO USE: Cylindrical batteries can be tested using the black negative pin, while button and combination batteries only need to be placed in their corresponding slots for testing; The compact battery analyzer weighs less than 0.36 pounds, making it extremely convenient for carrying and storage
- NOTICE: Please use 1.5V AAA alkaline batteries to power this product
- CHECK BUTTON: The household battery checker includes a self-check button. Press and hold for about 3 seconds to perform a self-check and view the power status of the batteries powering the device, allowing for timely replacement when necessary
9.3Excellent
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4
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
9.2Excellent
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5
X-cosrackUniversal 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
Main highlights- TIPS: What you get is a universal battery checker tester (2 AAA batteries not included). If you have any questions, don't hesitate to contact us.
- MULTI-FUNCTIONAL TESTER: This battery checker tester 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.
- HIGH COMPATIBILITY: This digital battery tester fit for all common batteries from small to large- 1.2V 1.5V NIMH Alkalilne AAAA, AAA, AA, A, C, SC, D battery 9V (6LR61/LR61) battery, 3.7V 3.2V 3.0V Li-ion LiFePO4 Lithium 10440, 16340(123A), CR2, 18650, 26650, 32650 etc, CRV3, 2CR5, 1.5V 3.0V Lithium alkaline button cell, 1.5V hearing aid batteries A13 A10, A675, A312, 3.0V various Lithium button cell (CR2032 CR2025 CR2016 CR1025 etc); 1.5V various alkaline primary button cell (AG1 AG10 AG13 AG11 etc), perfect household battery tester for all kinds of primary batteries and rechargeable batteries.
- 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.
- 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.
9.1Excellent
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6
DLYPOW10% OffUniversal Battery Tester, Dlypow Small Digital Battery Checker with LCD Display for Household Batteries AA AAA C D 9V 18650 CR123A LR44 CR2032 CR2 CRV3 1.5V/3V Button Cell Batteries, Cable Included
Main highlights- Works for all：Universal battery tester is compatible with 1.2V Ni-MH/CD, 1.5V Alkaline, 3.0V Lithium, 3.7V Li-ion and 9.0V batteries, including AAA AA C SC D N 18650 CR123A LR44 CR2032 CR2450 CR2 CRV3 1.5V/3V Button Cells, ect. Test a wide range of home batteries with just one device
- What You Will Get: Dlypow-DB1 Battery Checker Tester, USB-C Charging Cable, Welcome Guide, 12 Months Guarantee Period, and our friendly Customer Service
- Rechargeable & Long-Lasting：Small battery checker with USB-C stays standby for 2 - 3 months per full charge , reducing frequent battery swaps. Open-circuit test draws no power from the tested battery, ideal for daily checks and health management
- Easy Operation in 3 Steps：1) Press SELECT button to choose voltage range; 2) Insert battery with correct polarity; 3) LCD displays battery voltage and status. Perfect for daily testing and household needs
- Compact & Hold Battery Better：With the magnetic buckle, the household battery tester securely holds the battery better. Lightweight and Portable, easy to use and store. Simple and quick! Ready to use
- Battery Health Analyzer：Digital battery tester shows which batteries to keep or recycle with fun expressions—'Good' (green), 'Weak' (yellow), 'Replace' (red). No more guessing battery life or overcharging
9.0Excellent
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7
DWEII1PACK 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.
8.9Very Good
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8
DLYFULLDlyfull Universal Battery Tester with LCD Display, Small Digital Battery Voltage Resistance Checker for Ni-MH, Ni-CD, Li-ion, Alk & LiFe04 Batteries(AA AAA C D 9V 12V 18650 CR123A 2CR5 CR2032 Cells)
Main highlights- WIDE COMPATIBILITY: The easy-to-use battery tester with test leads, not only works all common batteries but also has a quality feel ensures hold up to long use. It fully works with A, AA, AAA, AAAA, C, SC, D, 9V, 3.7V Li-ion 26650, 21700, 18650, 16340(CR123), 10440, CR2, CRV3, 2CR5, CR-P2, A10, A13, and also handles a very wide range of button cells(LR621, CR2032) etc
- WHAT YOU GET: Dlyfull battery health tester & checker, 2x 1.5V AAA batteries(pre-install), welcome guide, and our worry-free 18 months warranty, no hassles friendly customer service and lifetime technical support
- RELIABLE & MULTIFUNCTIONAL: With its high ability to detect battery capacity percentage, battery voltage, and battery internal resistance, the precise universal battery meter is great for finding out if your EDC devices need new batteries or if it was device faulty. Such as kids' toys, flashlights, controllers, cameras, etc
- PORTABLE & EASILY USE: A versatile digital battery voltmeter that is easy to use and remarkably handy size. No need to insert your test battery into any bays, just selecting the corresponding voltage via the rotary dial and then connect the contacts well through the test leads and the digital checker will quickly provide you a reliable and accurate source of energy your test battery
- LARGE LCD SCREEN: Fully and clearly informed about the battery under test, it helps you easily and quickly finds out how much power your battery has to determine if they are charged or need replacement. Get a longer battery lifespan by not overcharging partially full rechargeable batteries
8.8Very Good
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9
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.
8.7Very Good
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10
DLYFULLBattery 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
9.9 Remote Control9.7 Simple to use9.7 FlexibilityWhy we love it
Quick results
LCD screen
Compact
8.5Good
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