SE Battery Tester (AAA, AA, C, D, and 9 Volt)

by SE

Product Details

• Item Weight: 2.2 ounces
• Shipping Weight: 2.9 ounces (View shipping rates and policies)
• ASIN: B000RB60H4
• Item model number: SE.BT20
• Average Customer Review: 4.1 out of 5 stars  See all reviews (234 customer reviews)
• Amazon Best Sellers Rank:
  • #12 in Electronics > Camera & Photo
• Date first available at Amazon.com: June 6, 2004

Product Description

Test All Kind of Batteries from Button Cell to AAA, AA, C, D & 9 Volt

Customer Reviews

Most Helpful Customer Reviews

93 of 93 people found the following review helpful:

5.0 out of 5 stars Useful product at reasonable price, January 24, 2008

By 

Ronald Allen (St. Louis, MO) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: SE Battery Tester (AAA, AA, C, D, and 9 Volt) (Electronics)

Very handy. Works on all popular battery sizes. Great way to determine strength of batteries that have been lying around the house for a long time. I have also tested batteries that I use in devices that take multiple batteries and can quickly determine if one or all of them need to be replaced. There are similar products on the market that likely work as well. This was one of the least expensive, is easy to use, seems durable and does the job.

104 of 107 people found the following review helpful:

4.0 out of 5 stars rechargeable batteries produce lower votage . . ., September 3, 2009

By 

trebe - See all my reviews
(TOP 500 REVIEWER)   

This review is from: SE Battery Tester (AAA, AA, C, D, and 9 Volt) (Electronics)

This review is for the SE BT20 battery tester, which is a good, low cost, easy to use tester, that provides basic information about the condition of a battery. The tester has three ranges, `Good' (green), Low (yellow), and `Replace' (red). The sliding red contact is adjusted manually.

The tester is designed to work with various types of 1.5 volt batteries (AAA, AA, C, D, disc or button type). Do not try testing a battery of a higher voltage, as you may fry a resistor, blow a fuse, or otherwise damage the tester. There is a separate set of contacts for testing 9 volt batteries.

To precisely measure a battery's actual output, a voltmeter would be used. A tester like the BT20 only provides a rough idea of battery strength. A new 1.5 volt, non-rechargeable battery, delivering the full 1.5 volts, should read at the top end of the green scale. Rechargeable batteries (AA, AAA, C and D size) are designed to produce only 1.2 volts at full output. Because this is 80 percent of the 1.5 volt maximum the tester is rated for, a NiMH battery will normally read somewhere in the middle of the green section. This may lead some to believe that the battery is `weak', when it is actually at its full rated power. While a lower reading is normal for a NiMH battery, a 1.5 volt non-rechargeable battery with the same reading, is actually down about 20 percent from full voltage, and may not have that much useful life left. Rechargeable 9 volt batteries are rated at only 7.2 volts, and would similarly produce lower readings, even at full power.

If you want a basic tester for 1.5 volt batteries, this is a good choice. If you need more precision, look at a voltmeter or multimeter.

57 of 58 people found the following review helpful:

5.0 out of 5 stars Does exactly what you want a battery tester to do!, December 28, 2008

By 

Mark Fitzpatrick "Math Teacher" - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: SE Battery Tester (AAA, AA, C, D, and 9 Volt) (Electronics)

This inexpensive device ships FREE! It does exactly what you want a battery tester to do - tell you if a battery is good or bad. No need to interpret a multimeter or fiddle with electrodes. The needle bounces to "good" or "replace." Easy. I don't know what these people need rubber bands for (other reviews). It takes one second to make contact with the battery and read the meter. There is no need to hold it in for more than a split second. You just push the slider to the battery with your thumb and your done. Easy, cheep, and accurate.