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Mastech BT558 Self-powered Battery Tester | 
 enlarge | Brand: Mastech
Category: Home Improvement
List Price: $9.99
Buy New: $3.95
You Save: $6.04 (60%)
New (4) from $3.95
Avg. Customer Rating:  45 reviews
Sales Rank: 56
Media: Misc.
Shipping Weight (lbs): 0.1
Dimensions (in): 2 x 2 x 1
Model: BT558
EAN: 6922782014171
ASIN: B00067V1TG
Availability: Usually ships in 1-2 business days
Shipping: Expedited shipping available
Condition: Our Battery Tester Retails for $9.95 and is Brand New, Never Opened and in its Own Box. Color - Black. Checks AA/AAA/C/D/ 9-Volt and Button Cell Batteries, including Hearing-Aid Batteries. For Regular and Re-Chargeable Batteries. Compact, Convenient, Portable and Easy to Use. Carry in your Pocket, Purse, Briefcase, or Glove Box. Makes a Wonderful Gift! 1-Year Warranty! Ships Same or Next Day. Delivery is Generally in a Few Days.
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| 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 |
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| Customer Reviews: Read 40 more reviews...
 indicator not accurate and a little tricky to hold January 4, 2009
This battery tester is not very accurate. Most of the AA batteries that I test fall under the good range, even when it needs to be recharged.
It is also a little tricky to clamp battery being tested.
I am not satisfied with this product.
 Didn't work December 17, 2008
0 out of 1 found this review helpful
If I could, I would not give this product one star. Did not work and totally useless. It's to cheap to even bother sending back.
Don't waste your money November 28, 2008
This does not work reliably. It often shows the battery is good when in fact it is dead.
 Should've bought sooner October 24, 2008
I love this battery tester. It's very easy to use and it saves you from throwing away a perfectly good battery.
Measures SOMETHING - but what? and resolution so-so October 21, 2008
This is supposed to test your batteries for good/replace-Recharge.
On the good side - it is small, and does SOMETHING.
On the not-so-good side
1. WHAT does it measure? this is not clear. There is no manual, and the
scale is unlabeled. I am *assuming* it measures voltage, but I have no
clue if this is under some sort of load or not, and so the results are
not very convincing
2. If it DOES mesure Voltage, this is not so good for Rechargeable
Batteries, as they only give out 1.2V even when fully charged.
2. The scale has strange proportions, with more than 2/3rd of it for "bad"
and only about 20% for "Good". This is not very useful.
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