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Your cart is empty.Foolproof, dependable tester accurately tests state of charge within temperature extremes of -40 degrees to 130 degrees Fahrenheit. Uses less than 1/4 ounce of acid.
Anthony J. Hitchings
Reviewed in the United States on January 7, 2025
It gave a positive 4 balls floating on a battery that was so flat it would not even click the starter relay for more than a microsecond
S. Veiock
Reviewed in the United States on January 21, 2025
Nice tool but the indicator balls are quite small.It would also help if the floating ball chart was on the testerin the event the paper copy gets lost or destroyed. I've seenit stamped on other testers before.
E. Howland
Reviewed in the United States on August 9, 2024
I mainly picked this because it was the only USA made one. Simply, tiny and nice. It should last for years.
Robert S.
Reviewed in the United States on December 29, 2024
Small & effective handy tool
Customer
Reviewed in the United States on December 22, 2024
This is a nice little tool. Good for small batteries. Lawnmower, motorcycle etc.
frank
Reviewed in the United States on October 24, 2022
If you have the old style motorcycle batteries that require you to fill them with acid and top off with distilled water every so often this is the tool you need.The tool won't fit as is, you will need to get 1/8" ID x 1/4" OD fuel line from the hardware store. Cut off about 2 inches, then use a heat gun to heat up one end to get it to fit on the tool. After this slight modification it works great.Hard to find these any more, and at a reasonable price too!
dboyle
Reviewed in the United States on June 19, 2017
Update: I still have and use the same one I bought in 2017, and it still seems to be accurate.Please note, this checks specific gravity, which only shows the state of charge for each cell. While it’s important and very useful for servicing and maintaining batteries, the state of charge does not reflect the actual amp-hour capacity or cold cranking amps that are checked with a conductance or load tester.These little hydrometer testers are getting harder and harder to find. I was happy to have found one that was reliable. I recently just bought a car and found it needing some battery maintenance, after having the battery go dead. I had a tester similar to this that was always reliable, but I haven't used it in easily 12-15 years. I found it and, immediately on trying to use it, the rubber bulb disintegrated from dry rot from sitting in the tool box for so long. I checked nearly every auto parts store in the area, and ultimately found one at a hardware store, but it was inaccurate and claimed all cells were overcharged, which I knew was false. It was only a dollar or two and you get what you pay for! This had good reviews, so I promptly ordered it. I checked it and it is accurate as compared to my full size glass hydrometer. It doesn't come with the nice yellow envelope to store it in, but it does come in a plastic storage bag and does have the red protective cover. Made in USA. The bulb is also a plastic material, so it's less likely to dry rot when I dig it out of my tool box in the next decade! This is worth the couple extra bucks for a good reliable tool. Indispensable for anyone who maintains serviceable car batteries. You don't always need to know the actual specific gravity, this gives you the charge of the cell in a percentage. Enough to know if the battery needs attention or not. It's made out of a clear solid plastic, no glass to break like the larger glass hydrometers with the float. Would definitely buy another.
glenbob
Reviewed in the United States on April 12, 2011
We use these at a golf course where we have about 40 carts, which have 6 batteries, with 4 cells each. That's 960 cells that need checking periodically. Other hydrometers are big bulky things with a gauge and a big bulb and a tube. This guy is quick, bam bam bam. It's also nice how it temperature compensates.Really, I don't need to know the numeric specific gravity. I need to know the relative state of each cell.You drop this thing in, squeeze two or three times to ensure you get fluid only from that cell and look at the beads, if one floats, it's 25% charged, if two floats, it's 50%, on up until 3 or 4 float. It literally takes 2 seconds to test a cell.It's also glass and comes with a nice sleeve to fit it in. And for those who care, it's made in the USA.
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