Sinometer BT558 Self-powered Battery Tester
by Sinometer
 |
List Price: Our Price: $4.88 You Save: $5.11 (51%) Availability: Usually ships in 1-2 business days Category: Tools See more product details |
Product Details
Manufacturer: SinometerModel: BT558
Product features:
- Checks AA, AAA, C, D, 9V types of regular or rechargeable batteries
- Internal battery not required, lasts forever.
- Compact size and light weight
- 90 days money back guarantee and 1 year limited warranty
Tools and Hardware Reviews of Sinometer BT558 Self-powered Battery Tester
Customer Review: Not accurate for many purposes
Summary: 2 Stars
This tester can identify a totally dead battery, but it can't distinguish a 90% spent battery from a fresh one---both will read "good". In some very low drain applications, like a clock, a relatively spent battery will work, but in many higher drain applications it won't. My electric toothbrush, for example, will stop working with batteries that still read "good" using this tester. When testing batteries from a flashlight where the light is so dim anyone would say that the batteries are "dead", this tester shows that the batteries reach the "good" zone. I've actually never seen this tester report a battery in the yellow "low" zone. You can use this tester to determine whether a battery can still be used for very-low-voltage applications, but in most cases it's useless.
Alkaline batteries are designed to continue to deliver 1.5 volts right until they're exhausted, even though there may be very little reserve power left in the battery. Think of a battery as a huge steel water tank, with a small spigot at the bottom of it that is barely open, allowing just a trickle of water to come out all the time. If you look at the trickle coming out, how full is the tank? You have no way of knowing. If all you need is a trickle, you really don't need to know how full it is. But if you need to open the spigot to get a strong stream of water, you need to have enough water in the tank to provide pressure. Seeing the trickle doesn't tell you how much you'll get when you open the spigot.
This tester can only tell you that the battery is capable of producing a trickle; it says "good" for any battery that has even a drop of power left in it. Just like the tank, that may be good enough if all you need is a few drops, but if you need to open the spigot further and get some real flow going, this tester is incapable of telling you whether the battery has that capacity or not.
Description of Sinometer BT558 Self-powered Battery Tester
Don't you just hate when reaching for the remote control and find out it's not operating because the weaken batteries? How can we test the little battery for remaining power? How much longer can we use those batteries before replacing it? This little compact tester unit is the answer. Just hook up the battery and you have an instant answer.Tools & Testers
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