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Their performance was … In contrast, the discharge curve of a lithium AA is very flat, so it will be about 1.4 V through its entire life before suddenly falling off a cliff at the very end.The take-aways from the AA tests:Not only was the capacity higher, but the voltage also stayed higher throughout the discharge curve. I also performed the same test on Duracell Copper Top, and Energizer Max. If the test occurred in January, I have little doubt figure 4 would show an easy win for the lithium cells.It’s important to understand the graphs above and below are made only from data that the beacon transmitted with sufficient strength to reach the distant digipeater.

While that level is still well above what you’d see in a very light load like a wall clock or a garden watering timer, it turns out that all of the batteries were pretty much the same there: 2700 mAh +/- 10%.The same trends held at the 500 mA level, similar to a reasonably bright LED flashlight. Here’s a comparison of Energizer Industrial batteries vs. other Energizer batteries and some of their Duracell counterparts.. 1) Energizer Industrial batteries vs. Energizer MAX & other normal Energizer batteries Not a surprise and entirely well within acceptable behavior of a failing power rail. I mean, dead first. You can indeed buy a bad brand-name battery. Energizer Max Alkaline AA Battery, 24-Count; Market share. Much less than a lot, but a touch more than a little. The American and Chinese Energizers rounded out the front group, about 15% off of the best performer, the Duracell Quantum.On the other hand, Duracell partisans are probably feeling pretty smug. In contrast, the lithium cell delivers almost all its energy in this test’s varying load.Figure 2 shows the voltage reported by the APRS transmitter normalized to the cell voltage by dividing by six.A six AA cell holder, wrapped in all that blue painters tape, powers the Byonics MT-2001. Whereas an alkaline AA has an average voltage of about 1.2 V under load (not to be confused with the 1.5 V nominal open-cell voltage), a lithium AA will maintain a voltage under load of about 1.4 V.At the 50 mA level, which would provide data that would be useful for selecting the cells for your TV remote, even the worst performer was only 15% back from the best performer. This is good short circuit protection that alkaline cells do not seem to provide. It will probably be expecting an alkaline discharge curve, so it won’t be able to ascertain where it is on the lithium discharge curve. The majority of our parent testers gave these batteries good or very good ratings for quality, value and ease of use. I’ve seen alkaline cells melt the insulation off wiring and send smoke to the heavens. We have already tested more than 10 various 1.5V AA-size primary batteries (single use non-rechargeable models) from various brands including some of the most popular such as Duracell, Energizer, Panasonic, Toshiba, Varta and others so we have decided to do a little ranking by listing the top performing models in our tests in the various load scenarios we are using for testing. An alkaline battery apparently provides the full energy capacity at only very low current draw while severely increasing over time its internal resistance with higher power loads. Though a bit less expensive than the Lithiums, can they provide enough performance to avoid the need for them? I love that I don't need to change them as often as alkaline batteries.It’s quite clear temperature has a large effect on Lithium batteries in this configuration. It was too good to pass up testing the exact same APRS beacon with fresh Energizer MAX AA cells. It was too good to pass up testing the exact same APRS beacon with fresh Energizer MAX AA cells. Every battery is built for different purposes - even if it’s only in the wrapping. Energizer AA Batteries (48 Count), Double A Max Alkaline Battery Model: E91DP-24 Condition: New. I mean… it had by far the lowest usable capacity, only about 50% of that of the Fusion sub-brand.

Figure 4 compares the results of the first and second tests.With the better performance, growing availability and waning price of Energizer Lithium Ultimate cells, I’m beginning to sense the era of the alkaline power cell is in end stage. Duracell has about 29% market share and Energizer about 25%. Parent testers found the Energizer Max alkaline batteries provided reliable and long-lasting power when used in everyday household gadgets. Just speculation, nothing more.Fortunately, it turned out that a lot of batteries were crap, so some tests went unexpectedly quickly.In other words, the AAA results were entirely different than the AA results. You will probably barely notice the difference in capacity, so if you don't want to waste time shopping around then its a good choice. Spoiler: no. It transmits one APRS beacon every two minutes (adjustable) with a current requirement of about 800 milliamps for about 1/2 a second.