25 Reviews
72% (18)
8% (2)
12% (3)
4% (1)
4% (1)
40% Recommend this product (10 of 25 responses)
By John
worthington, ohio
quick and convenient
January 25, 2022
extremely handy to have around lets you instantly check the power left in a battery even tests button batteries other batteries from AAA up to D (even the less-common N batteries) panel at top shows strength of charge I've found the instrument is accurate with all batteries I tested.
By John D.
Clarence Ctr, NY
Great Battery Tester
August 17, 2021
The universal tester has a easy to read scale and allows for testing button type batteries. A must have in every household.
State College,Pa
Great Item
April 12, 2021
I should of had one of these years ago, Works Great it only takes a few seconds and you know if it is good or not
By Rus
Phoenix Az
Much needed
April 5, 2021
This is the only tester that I found that could test 3.5v battery for my security system.
By Biomed T.
Works well
July 22, 2020
Good Tester
By Bubba d.
About time I got one
March 18, 2020
Finally I can test all types of batteries I have. Works great
By Josue
Boulder, CO
its ok? Coin batteries?
February 26, 2020
Love that its easy to read on the screen, but we had a few batteries that we know that they did not work and test with a volt meter and the T-333 said it was still good? this was with coin batteries 2032 &2025 but all other batteries looks like it works fine.
By Bernie
CANNOT TEST CR2450 3 Volt button cell batteries Do Not Buy if you want to test these.
December 14, 2019
I purchased this tester primarily to test CR2450 3Volt button cell batteries. Now that I have the tester (and 3 Volt Batteries also purchased from Battery Junction) I see that the CR250 batteries do not fit in the 3Volt round slot so I cannot test the batteries. I relied on their advertising that said Button cells or other batteries with same voltage could be tested. The tester itself says 3V in the round circle. Very disappointed in advertising and product.
By Jerry
Schenectady, NY
Most bang for your buck
September 21, 2019
Simple, easy to use, and inexpensive. What more do you need?
By Bill
Brooklyn, NY
July 1, 2019
It's not as accurate as the ZTS model. Of course the ZTS is more expensive.
By Raymond
Cedarhurst, NY
Great Battery Tester
January 18, 2019
This is a great little battery tester, Are use it all the time never failed me yet.
Roselle, IL
Great battery checker to have around the house
October 27, 2018
Simple, versatile, and inexpensive, this item is sold under a variety of brand labels, and no matter the brand, this checker is very useful to "separate the sheep from the goats" when you encounter a typical battery stored in that junk drawer, or a dim flashlight that has a number of cells. While it doesn't provide a "load" test capability, it still works well for Alkaline's and Carbon Zinc's, even most button cells you run into (since many are alkaline, not Lithium), but be aware that the test of "flat discharge" cells like newer NiMH and Lithium's might not be telling the whole truth unless they are almost totally depleted.
By Marilynn
Fort Pierce, FL
money saver
January 5, 2018
Saves money on battery replacement as often only one battery in a set loses power. without testing, you would automatically replace all the batteries in the item. with this you may only have to replace one or two.
By Al
South Carolina
A necessary ttol
September 4, 2017
It works great and helps create a system to completely insure all eletronic items work
ProsEasy to use and easy to read
By Jeff K.
La Grange, IL
Just OK
September 7, 2016
Tester shows that the battery still has juice, but not HOW MUCH juice.
By Harriet
San Juan Bautista, CA
It does exactly what I wanted for my husband with Parkinsons,
May 28, 2016
He is used to using a voltmeter, but now he has trouble holding the probes on the ends of the batteries and then reading the dial :( Thank you!
Conshad trouble finding out where to test the 9v battery, waiting for an answer to my question... but am impressed that there was an obvious place to ask questions :)
By Emilia
Ansonia, CT
Battery Tester
May 16, 2016
Great item! Can test various types of batteries. No longer have to guess if a battery still has any life in it or that it's discharged.
By Val
Grand Junction, CO
April 9, 2016
Now I can check my batteries before throwing them out! Perfect!
By Robert
Weimar, TX
Energy T-333 Battery Tester
April 8, 2016
Great versatile product.
By Cpk
Nothing more than just a voltmeter
March 30, 2016
Unfortunately this tester is nothing more than a glorified voltmeter with a bar-graph. There is no load applied to any of the battery sizes and therefore next to useless to indicate the potential capacity left in the battery. If you look inside, it is very nicely constructed, nice PCB layout and looks like they were close to make this a true tester under load. There are a bunch of resistors that look like they're coming from each of the terminals, however, the only resistance that I measured is about 50kOhms, probably the impedance of the meter itself. Also, there's no current going through the battery when testing (measured with a Fluke). It's nice how they molded the case for various types of batteries, it's not too large, fairly easy to use, but again, not useful as a true indicator.
Pros- Digital Bar Graph readout - Tests a variety of alkaline 1.5V, 3V Lithium and coin cells
Cons- No load testing. It's just a Voltmeter. - Needs 1xAAA to operate - Expensive for what it does.
By Sean
, Long Beach, NY
Does It's Job
February 25, 2016
Does exactly what it's supposed to. Check the status of a bunch of different batteries nice and easy. Well made.
By Harry
Eureka, CA
Great Product
November 20, 2015
A great product at very good price. It very easy to use.
By Ray H.
Love this item
July 10, 2015
Over a year this has tested all the different size batteries. Now, I bought a 2nd one as a Birthday gift. Easy to use and more rugged than a mmutineer.
By David
Nice and Simple
November 28, 2014
Works great. Price was good and the unit works great
By C K.
Universal Digital Battery Tester
December 21, 2009
Just received tester. It works great. It test a lot of different batteries but not sure of different styles.

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