Best Electrical Battery Testers of 2025

"I was initially worried about the mixed reviews, but as an Electrical Engineer, I found this battery checker to be incredibly accurate. It helped me determine the charge level of my rechargeable batteries, allowing me to make informed decisions for my recording equipment. This unit is convenient and hassle-free!"

"This compact tester is easy to use and gives clear readings. The display accurately reflects the degree of charge, making it a handy tool for checking batteries."

"I appreciate how this device checks everything—from standard batteries to those harder-to-find button batteries. It's so user-friendly that even my kids can help sort batteries with it!"

"I find this tester to be very easy to use and effective. I can test both old batteries and some unopened ones from years ago. It quickly tells me if they are good or bad, which saves me money. Plus, the price is just right!"

"Having owned this device for about two years, I recently got a second one for our other home. Initially, I was skeptical about its performance, but it has proven to work very well. As a HAM operator familiar with test equipment, I can say that it is quite accurate on all the batteries I've tested. I’d highly recommend it!"

"This battery tester is truly perfect and incredibly useful. I can test all the batteries as needed, and I highly recommend it to everyone!"

"I had been searching for a battery tester that could reliably tell me if leftover batteries were still good. I found this one and loved it so much that I purchased another as a gift. It’s compact, easy to use, and shows critical information like voltage and a qualitative suggestion. Such a great find!"

"This La Crosse tester is excellent! I’ve used it with various battery types, including alkaline, lithium, and NiMH. It provides accurate readings and is so compact that it’s easy to store and take with me. I appreciate the clear digital readout and the ability to see the actual voltage instead of vague terms like 'good' or 'empty.' If you're considering a battery tester, just get this one!"

"Finding this battery tester was a game changer for me. It's small and requires no external power, which I love. It gives both a qualitative strength value and an exact voltage reading. This feature is particularly helpful when testing multiple batteries and ensuring their voltages are close. Plus, the simple toggle for different battery types is super convenient!"

“I gifted the Battery Daddy to my husband for Christmas, and it's been such a great addition to our home. It organizes and holds a variety of battery sizes, and the built-in tester is a fantastic feature!”

“This product is minimal yet necessary. I used to have a drawer full of loose batteries, and now with the Battery Daddy, everything is organized. When a storm hit and my flashlight batteries were dead, I quickly found the right ones thanks to this storage system. I highly recommend it!”

“No more cluttered junk drawer! The Battery Daddy has made it so convenient to organize my batteries. I love the tester that comes with it too. My only wish is for a larger coin battery compartment, but overall, I highly recommend this case!”

"I find the Dlyfull Battery Tester invaluable! Its LCD display and compatibility with various battery types, including AA, AAA, C, D, and button cells, make it user-friendly. This tester has saved me time and money by avoiding unnecessary battery disposal. It's compact, easy to store, and I appreciate that it comes with a AAA battery included. This tool has ensured my devices run smoothly by helping me know which batteries to recharge or replace."

"I really like this battery tester! It's super easy to use. I had five batteries lying around that I wasn't sure about, but after testing, they all registered as new! This has definitely helped me save money!"

"I hesitated at first, but the design and digital readout are clear and easy to understand. It feels solid and durable, and I believe it has already paid for itself by testing batteries I thought were dead. A great investment!"

"I found this tester to be a very nice little tool at a low price. It's versatile with 9 selectable battery types and voltage ranges from 1.5 to 22.5V. However, the schematic in the manual could use some identification for clarity."

"After changing my Tesla's battery, I encountered a problem again. This tester helped me ensure my 3V coin batteries are in the 'green' range. I’ve tested various batteries and I’m even more satisfied with this purchase now; it's a great deal."

"I really appreciate the analog design of this tester; it doesn’t require its own batteries, which is a plus. It’s about the size of a soda can and has lots of settings. However, I wish the probes were a bit longer."

"I had a lot of batteries in a box and couldn't tell which were dead or alive, but this tester has been incredibly helpful. It makes it so easy to discard the dead ones and even use the weaker ones in low-draw devices. Super easy to use and feels quite solid in quality. Even kids can handle it without issues. A handy tool to keep around!"

"I just got my new tester and noticed a defect in the lower left corner of the LCD, but it doesn't affect the functionality, so I'll keep it. This tester works well and is the best one I've purchased so far. I really appreciate the LCD displaying the charge state with some granularity. Despite the defect, I'm planning to buy a second one for the shop."

"I've used many battery testers over the years, but this is the first one that makes it extremely easy to test nearly all types of batteries, from AAA to D and even button batteries. The readings seem more accurate than older testers. It's worth the purchase price!"

"I found the Dlyfull Battery Tester to be exactly what I needed. It works exceptionally well, and the item matched its description perfectly. Plus, it arrived promptly. I would highly recommend this company!"

"When I first used this tester, I noticed that it sometimes shows a 95% capacity for a brand new battery. After checking it again, it reads 100%, which is a bit annoying. However, this tester gives a more accurate reading by loading the battery, unlike my multimeter. Despite needing to check twice, I still think it's better than standard testers, so I would recommend it!"

"I really love this battery tester! It's so easy to use for button and coin cells; I just place the battery in the right slot. For larger batteries like AA and AAA, I only need one wire contact. The digital display is clear and shows the percentage of charge, voltage, and battery icon. It's fantastic for quickly checking all the batteries I use!"

“I absolutely love this product for quickly checking battery viability. It's easy to use and incredibly useful, plus it’s a great price!”

“I bought this device to manage my messy battery drawer. I like to test batteries before using them to avoid mixing bad ones.”

“I tested this device as part of a product review and found it convenient and user-friendly. It provides quick feedback on battery status without needing batteries. However, it feels a bit lightweight and less sturdy than I’d prefer.”

"I find it quite easy to use. The dedicated receptacles for various battery form factors make it simple."

"We had a box of random batteries, and I got tired of my kids asking me to try 47 batteries to find one for their toy. This product works great, and it's simple to use. On top of that, my kids find it fun to use, so they do it themselves!"

"I love the compact size; I can toss it in the junk drawer, and it's there when I need it. It saves a lot of confusion and waste with expensive batteries. It seems to be very accurate, and I really like it!"