Here are all the Best rechargeable batteries in the world now: CHECK ALL HERE
I created this website to raise consumer awareness of generic and name brand batteries. I am not an engineer, nor do I work for any battery companies. I have absolutely no financial incentives to favor one brand over another (actually, I had to finance this entire project by myself), so don’t worry, I won’t skew any results because I have no motivation to do so. In fact, the only reason I have this site is to raise consumer awareness and help put to rest some of the myths out there about generic products.
You may be wondering why a lawyer would perform an experiment like this. Well, like most of you, I hate to waste money. One way to save money is to cut back and purchase generic items. I have always been curious if you “pay for the advertising/name” or if you “pay for what you get.” Before I started this project, I scoured the Internet and tried to see if anyone else had already performed the same tests (if so, then I would just click print and not have to do it myself). The only website I found was Rayovac’s batterytruth.com and it wasn’t very informative (there were no numbers involved just people’s opinions). I decided to go through with my own tests. When I accomplished what I set out to do, it was rather self-fulfilling, but no one else benefited from it. So, I am providing this website to all who seek the information contained herein free of charge.
All I ask is that you refrain from taking my results and printing everything I have done for a science fair project (or the like) or to otherwise try to pass this work off as your own. I don’t care if you use the data to make a well-informed purchase, but I do care if you try to take credit for something I put my own free time (and money) into. All of that aside, please use this information, build off of it, send me comments and just put it to use somehow.
In the future, I hope to use the same procedure and see if batteries last longer if they are stored in the refrigerator as opposed to room temperature. While I am at it, I think it would be neat to see if batteries last shorter if they are stored at above room temperature. To do this, I will get a package of batteries, store a few in the refrigerator, store a few at room temperature and store a few in my car (these nice Maryland summers should provide me with enough heat to do the job).
Best rechargeable batteries 2018
I recommend you go to this website in the following order (some concepts build off prior sections):
1. The Device
2. The Experiment
3. The Results
The device I used for this project is a West Mountain Radio Computerized Battery Analyzer (CBA) [available from West Mountain Radio]. The CBA connects to your computer to download the data and control the device. You connect the batteries to the CBA for testing. The CBA then puts a constant load (current draw) on the battery. This is similar to using a light bulb connected to a battery to determine how long it lasts, but with the CBA, I can determine how far I want the battery to discharge to and have a nice, constant current draw to get more accurate results (and nice graphs as well).
For a little background in electronics:
Volts [V] à The potential for electricity (Ex: A 9V battery has the potential for producing 9V)
Amps [A] à The amount of electricity being consumed (Ex: A 100W household light bulb consumes 1A)
Watts [W] à The energy of electrical work (Ex: A light bulb running at 110V and consuming 1A has the energy of 100W)
To calculate the values
Volts x Amps = Watts Watts ÷ Volts = Amps Watts ÷ Amps = Volts
Amp Hours [Ah] à How many hours the battery will last with a 1A draw (Ex: 2Ah battery will last 2 hours with 1A draw OR a 2Ah battery can last 1 hour with a 2A draw).
Ok, so now that I have explained the device and the math involved; now on to how I actually progressed through the experiment.
I only used AA batteries because I found them the cheapest to work with (don’t forget, I had to finance this myself).
I set my CBA to assume the batteries all had 1.5V (They were anywhere from 1.55V to 1.65V, but are all labeled 1.5V). I then set the CBA to draw a constant 0.5A from the battery (this simulated using the battery in a CD player or flashlight, except it is a constant current draw). The cut-off voltage I set to 0.75V. So, whenever a battery reached 0.75V, the experiment would be over for that particular battery. Normally, a battery-operated device will not work when the battery is below 1V; so this test actually drains the battery past “normal usage” because the battery went below 1V.
Rechargeable batteries test 2018
See below for the final conclusions and the top three battery choices.
Here is a graph comparing all of the batteries:
As you can see, the Duracell CopperTop and the Energizer batteries lasted the longest (over 1.60Ah), while the “generic” batteries all lasted for a shorter duration (1.10Ah to 1.16Ah).
Now that we see the “name brand” batteries are indeed longer-lasting, the experiment isn’t over. Remember my purpose was all about cost and determining which battery is cheaper. Just because a generic battery doesn’t last as long doesn’t mean that they are not a good bargain, don’t forget that they are cheaper. In fact, the number one result may surprise you!!
Costs: Last price check on 4/22/2009 from www.target.com and www.harborfreight.com
Duracell CopperTop à $10.39/16 pack ($0.6498 per battery)
Energizer à $7.49/10 pack ($0.749 per battery)
Rayovac à $5.99/12 pack ($0.4992 per battery)
Thunderbolt Magnum à $5.99/24 pack ($0.2496 per battery) ** ONLY available at www.harborfreight.com**
#1 Thunderbolt Magnum: The cost is $5.99 for 26.4Ah à $0.2269 per 1Ah
$5.99 ÷ (24 x 1.10Ah) = $0.2269 for 1Ah
#2 Duracell CopperTop: The cost is $10.39 for 26.24Ah à $0.3960 per 1Ah
$10.39 ÷ (16 x 1.64Ah) = $0.3960 for 1Ah
#3 Rayovac: The cost is $5.99 for 13.68Ah à $0.4379 per 1Ah
$5.99 ÷ (12 x 1.14Ah) = $0.4379 for 1Ah
#4 Energizer: The cost is $7.49 for 16.64Ah à $0.4501 per 1Ah
$7.49 ÷ (10 x 1.66Ah) = $0.4501 for 1Ah
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That’s right, the worst-performing battery I tested, happens to be the best value. Thunderbolt Magnum batteries may only be able to hold up for 1.10Ah per battery, but they are nearly 57% cheaper than the next best value (Duracell CopperTop). So there you have it, the best value is in fact a generic battery. If you found this surprising, please share this website with others to help spread the word about the truth behind name brand verse generic batteries.