Gardner Bender GBT-500A Analog 1.5 V Button Cell/22.5 Photo/AA/AAA/12 V/9 V/Lantern Cells & More, Leads Battery Tester,14 Battery Range, Black

Works pretty well. The unit works as described and is very useful. Feels lightweight and cheap, does not feel very durable , but is very lightweight. It works for quite a few types of batteries, so check the dial if there is any you want in particular. You can do the math if you have batteries supported, e.g. if they are an easy fraction of the voltage of any of the included battery types. Gets the job done, 6 months later I use it all the time.

My old tester finally fell apart and duct tape no longer held the leads, so after 50 some odd years I had to find a new one. I looked at all the digital ones and did not find anything suitable for my needs. And quite frankly, I’m tired of all the fancy ones out there. I’m old school and all I want is to see if a battery is good or not. I decided to try and find an analog model when this one came up. It’s perfect, does all the standard household batteries, button batteries and even the odd sized ones. If all you need is a simple tester without the bells and whistles, that actually works without a 10 page book of instructions, this is it. Not all new ideas are necessarily better. This one was inexpensive and does the job.

Edited 12/10/15 to fix some typos. Thanks for kind comments! Edited 12/12/20 as some reviewers claimed this doesn't test under load. It does! Turns out they posted to the wrong device! I also added a small information bit to help some readers better understand a few electrical terms I use. REVIEW This is a very nice analog tester. It has a quality feel, and test leads that appear likely to hold up to long use. I've bought 7 so far, 3 for me and the others as little gifts. (I dont accept payments for reviews). It handles a very wide range of batteries. I am very pleased with mine, especially at its low price. There are incredibly cheap testers available on Amazon, but they lack the ability to appropriately load the battery being tested. Here's what I mean. A battery tester works by putting a load on a battery and measuring the voltage at the battery terminals. The reason is that this voltage, measured with a good voltmeter that draws almost no current, changes little as the battery wears out. What does change is that the battery's internal resistance increases, which wastes energy, and the amount of chemicals available to generate current decreases. By putting a load on the battery, the meter can see whether the battery is still able to do its job. This tester has 9 switch positions which set it to select a reasonable load and voltage range for a battery type, giving you a much more reliable test than a plain voltmeter can. See the table below. Notice that there are 3 different current drain settings for 1.5 V batteries. These are chosen to roughly match their normal use; 1 mA for tiny button cells used for watches, 50 mA for AAA batteries, used for remote controls, and 150 mA for AA or bigger C and D batteries used for flashlights, etc. If a tester draws too much current, it can deplete the battery just by testing it, and a battery tested at too little load may test Good yet not work in your device. Understanding this, this tester is still very useful in sorting through batteries, even if your device uses an unusually high or low amount of current. Digital cameras, for example, draw a lot of current for a few seconds when they are recharging their flashes; the internal resistance of ordinary batteries wastes power, giving them short useful lives. Yet they can last for years in a low-drain steady application like a clock. So you need to use your judgement. If you find that batteries test good but only move the tester needle a little above the bottom of the green range will not work in your device, yet you might be able to use them in something else for a while. SPECIFICATIONS (from supplied manual) Range..............................Load Current.........Minimum Voltage for ......................................Drain...................GOOD Indication Button Cell 1.5V.................1 mA...................1.125V +/- 0.0W AAA-N-1.5V.......................50 mA.................1.125V +/- 0.09V AA-C-D-1.5V.....................150 mA................1.125V +/- 0.09V Lithium 3V..........................1 mA..................2.25V +/- 0.18V 6V...................................10 mA.................4.50V +/- 0.36V 9V...................................10 mA.................6.75V +/- 0.54V 12V.................................10 mA..................9.00V +/-0.72V 15V.................................10 mA..................11.25V +/- 0.90V 22.5V...............................10 mA.................16.875V +/- 1.35V Sorry about the formatting. Some Amazon doofus decided it would be nice to strip out all my tabs and extra spaces. Try landscape view if you can. On second thought, maybe I should not have called her a doofus. I am told Amazons are pretty tough ladies! Maybe they just wanted me to use up all my punctuation marks so I'd have to order a new box of periods! :-)

It's a simple electronic device, so it works fine. The lettering is a bit small for my eyes, so I downgraded it to 4 stars

Great little tester at a decent price. You will find yourself scrounging up batteries just to use it. Who knew it would not only be practical but also a fun product?

This is hands down the best and only full function all battery tester. With an analog read out, battery contacts on device, coin batteries probes etc you can't get better. You can test alkaline as well as rechargeables. I had one of these for almost 20 years and never let me down. I lost it and was so happy when I was able to find the same model about the same price from back when I got the first I had. I would say if you do battery testing, especially rechargeable, alkaline etc you owe it to yourself to purchase one of these and always know an exact amount of juice left. 500 star rating.

This unit is invaluable to have. to check the energy left in your batteries! Works on all types of batteries. It is basic, accurate and easy to read. I recommend getting one of these if you have batteries in your home.

great product

Cheap quality product, not sure about the accuracy of the reading it shows, It is not worth for this price

一般用のテスターは負荷を掛けて測る事が別装置を作り測るが本テスターは スィッチの切り替えで速く測る事が出来るので、お客様が納得してもらえる ので好評を得て使用してます。Dr、仲間にも好評です。

I got fed-up with the cheapo battery testers which read inconsistently and vary from tester to tester but couldn't justify buying the ZTS MBT-1 Multi Battery Tester (£44 plus an extortionate £21 delivery) despite the rave reviews! The Gb-gardner Bender seems well made and gives consistent readings. A little care is required when interpreting the reading, but that seems to be par for the course. Choose your supplier carefully - I paid £12.45 with FREE deliver (surprising, since it came from the USA) but it's also on Amazon at total costs of £31 & £34.

What I like best about this device is that it can handle everything including AAA, AA, C, D, N, button cell, CR123 (3V Lithium), 6V, 9V, 12V, 15V and even 22.5V batteries yet doesn’t require any batteries to power itself like a multimeter does. As such, I don’t have to worry about any battery leakage after long-term storage between uses. And the two permanently attached test leads also come in handy, as does the built-in retractable stand on its back.

Me sorprendió la predicción en la medición que tiene . Muy buen producto