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Ansmann 4000042 Energy Check Battery Capacity Tester

4.5 out of 5 stars 30 customer reviews
| 3 answered questions

Price: $27.37 & FREE Shipping
Only 10 left in stock.
Ships from and sold by stores123.
  • Handy and easy to use
  • Suitable for all roundcells and 9V E-block
  • Battery measured in 25% steps
  • Measures battery under load for best accuracy
  • 2-year warranty
3 new from $27.37 1 used from $10.00

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$27.37 & FREE Shipping Only 10 left in stock. Ships from and sold by stores123.

Frequently Bought Together

  • Ansmann 4000042 Energy Check Battery Capacity Tester
  • +
  • Ansmann 5207442/US Energy 8 Plus Battery Maintenance Universal Desktop Charger
  • +
  • ANSMANN Rechargeable 9V Battery 300mAh pre-charged Low Self Discharge 9Volt NiMH Rechargeable Battery (1-Pack)
Total price: $82.73
Buy the selected items together


Technical Details

  • Brand Name: Ansmann
  • Model Number: 4000042
  • Item Package Quantity: 1

Product Description

Ansmann Energy Check for NiCd/NiMH-rechargeable batteries and primary batteries, for sizes AAA, AA,C, D and 9 V cells.

Product Information

Product Dimensions 5.5 x 2.8 x 6.8 inches
Item Weight 5.6 ounces
Shipping Weight 5.6 ounces (View shipping rates and policies)
Manufacturer Ansmann USA Corporation
ASIN B0000DC1CR
Item model number 4000042
Batteries 1 9V batteries required. (included)
Customer Reviews
4.5 out of 5 stars 30 customer reviews

4.5 out of 5 stars
Best Sellers Rank #7,877 in Computers & Accessories > Laptop Accessories > Batteries
Date first available at Amazon.com February 12, 2007

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

At least this tester does test the batteries under some kind of load. This is nothing fancy, but it will test your batteries reasonably well. I say 'reasonably' because there are $50 or more testers out there that can do a better job and give you a good bit of information about the battery under test. But I don't want to spend that kind of money, and this thing will do well enough.

There are hundreds of inexpensive devices that say battery tester, but they DON'T DO A DARNED THING. They are just little voltmeters. YOU CANNOT TEST A BATTERY WITH A VOLTMETER alone. YOU CANNOT TEST A BATTERY UNLESS IT IS UNDER LOAD. To test a battery with a voltmeter requires other items and knowledge of what you are doing.

If you want a battery tester, and it doesn't say it tests under load, and you can't figure out whether it does or not, don't buy it. A simple voltmeter is useless as a battery tester. Even a $400 voltmeter not specifically designed to test batteries is useless as a battery tester.

If the tester is under $20, there's very little chance that it tests a battery under load. The Ansmann 4000042 does.

I also saw the ZTS Mini Battery Tester - ZTS MINI-MBT that looked good, but it was around $40 and I didn't need to test all the types of batteries it handles.

I give this tester only 4 stars for two reasons. First, it tests only one parameter of a battery. But, it is the key parameter. Second, it is slightly clunky to put a battery in it to test. So slight, that it is probably not even worth mentioning.

Would I recommend this tester? At less than $20, and for general household use, most definitely.
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This is by far the best battery tester I have used. Have been using it for 10 months and no problems whatsoever. Nice to know which batteries are good and which can be discarded. Nice to know the capacity of my rechargeable NIMH batteries -- like the Eneloop batteries that claim to hold a charge longer than others. The size and the fact that it needs a 9V to operate doesn't bother me. I use it at home and the 9V that came with the charger is still working fine after 10 months.
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This worked well and immediately told me if batteries I had were charged fully or partially. Useful for both rechargeable and non-rechargeable. Slight problem sometimes with knowing if a particular size fits, but generally ok. In the long run, this is going to save me money as I have many batteries for electronic devices, especially remotes.
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I really like this battery tester. This tester is more accurate than the more common inexpensive testers as this one puts the battery under load. Batteries tested with the needle (volt meter) type often are misleading as a test may show a battery as good, but once placed into the device and turned on, the battery really is weak. Plus, this tester shows the energy remaining in 25% increments instead of the less definite ranges of green, yellow or green.

I also owned the ZTS Mini 9R Battery Tester which also tests a battery under load. Between the ZTS and Ansmann, I prefer the Ansmann. Though the plastic material on the ZTS is more durable, the use of the probe and having to balance a battery on little nubs makes the ZTS awkward to use.

As for this Ansmann tester, it tests the common sizes (AAA, AA, C, D and 9V). On the front there are two scales, one for rechargeables and the other for 9V/alkalines ( "primary"). Both type of batteries light up the same green led lights but depending on the type, one needs to refer to the appropriate scale (above or below the leds).

Compared to most inexpensive testers, this is a large tester. More about the size of an old incandescent bulb, but flatter in the bulb area. Testing for the most part involves placing a battery in place and then sliding the halves (top and bottom, help by springs) together to make the proper contacts. I say for the most part, as the tester best tests size C and D batteries. 9V batteries requires lining up the negative and positive contacts. The inner center area are for AAAs.. But one has to make sure the bottom of the battery is indeed touching the bottom contact as I've found myself having the battery touch a plastic area and having to adjust.
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Battery tester works great when testing batteries.
I'm not sure if mine was defective or a bad design.
It uses a 9v battery to power the tester and after 2 weeks of sitting with the battery installed, the battery was dead.
I installed a brand new 9v battery that read 100% charge. 2 days later the battery showed 75% charge.
Based on this, I would not recommend this tester.
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Nifty little battery tester. Doesn't just tell you that the battery is good or bad, rather, tells you that it has 25% 50% 75% or 100% power remaining. So you can decide whether to reuse that gently used battery or that battery that has been sitting in the drawer for 2 years. We were also able to use it for diagnostics. When our emergency lamp wouldn't work, then wouldn't work with some used replacement batteries, we ordered this unit, to find that all of the batteries were fine, and the light itself was defective-which we could fix once we realized it.
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