I have heard that Li batteries have a relatively steep voltage roll-off curve. This may cause a device's low battery warning light to provide a very reduced window of opportunity to replace the batteries before they go dead, especially since they already have a lower operating voltage than alkalines.Depends on the use. If the device is a high draw like a light alkaline is the choice because they can supply high current over a period of time. However, for low current draw devices like smoke detectors and your multimeter lithium is the choice. They can supply a steady low current for up to their shelf life of seven years.
Keep in mind also that lithiums rarely if ever leak so I like to use them in high value test equipment that I never remember to check the batteries in.
They must have taken something useful out of batteries now, perhaps mercury? Used to be Duracells never leaked. Now, they all seem to, whether its Duracell, Kirkland (rebadged Duracell), EverReady, ...
This is true, at least for the Li ion battery things I have. They run full speed until the last 20 seconds or so before they crap out. I barely have time to notice the drop in performance before they stop completely.I have heard that Li batteries have a relatively steep voltage roll-off curve.
Several times I have had a half shaved face for a while until my shaver got enough of a charge for me to finish.This is true, at least for the Li ion battery things I have. They run full speed until the last 20 seconds or so before they crap out. I barely have time to notice the drop in performance before they stop completely.
Speaking of which, have you ever noticed that the outer case of alkaline batteries is the positive terminal?
I want to add my points in this debate that the alkaline batteries we use today made their debut in 1959. By the mid-1980s, they had surpassed zinc-carbon batteries as the most popular battery chemistries. Since their introduction billions [probably trillions] of units have been consumed in every part of the world. As far back as 2009, there were an estimated 50 billion alkaline battery units in circulation, amounting to an average of between 7 to 8 units per individual each year. Today, the alkaline battery market is a multi-billion-dollar industry projected to grow further in the future. This success, even in the face of competition from other battery chemistries is due to some distinct properties of the alkaline chemistry. There are a few factors behind its popularity among others such as high energy density, cost-effectiveness, lower temperatures, longer shelf life, design improvements, suitable for potting, can be connected serially, and easy to dispose of. It was a short alkaline battery overview by me, you may disagree with it. Thanks!I did notice that some time ago, but thanks for reminding me of that. It's interesting that the alkaline cell construction is kind of inside-out from that of the old cylindrical zinc-carbon dry cells. In alkaline cells the zinc anode is in the center, while in dry cells the zinc anode is the can on the outside.
When we were kids we used to take apart old dry cells to get the zinc and carbon rod out of them. You could put the zinc in muriatic acid to get hydrogen for experiments. We found that Burgess dry cells had a lot of zinc left after they were worn out. But Eveready cells had very little zinc left in them. Maybe that's why Burgess went out of business and Eveready is still around.
The carbon rods could be used for doing electrolysis to get hydrogen and oxygen from water (and also chlorine if you put table salt into the water). The powdery black stuff inside of dry cells was manganese dioxide, and if you put some of it into hydrogen peroxide it would generate oxygen.
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