Dollar Tree alkaline batteries don't last that long

[Motostu]

I hope that picture isn't of your batteries; the date on them is 2020.

 

[JEDI]

I hope that picture isn't of your batteries; the date on them is 2020.

lol no.
copy pasta image

 

[igor_kavinski]

My battery of choice is PP3. The only battery type where you can lick both electrodes at once!

 

[dullard]

wait.. what?
why would it die sooner in slow trickle devices?
sounds counter intuitive?

Two effects. First there is the Ragone plot across the various battery chemistries. Batteries of a given size can be high power or high capacity -- generally not both. For example, on the Ragone plot below, alkaline batteries tend to have a lot of energy stored (high on the vertical y-axis), but cannot put out a lot of power for high drain applications (low on the horizontal x-axis). On the other extreme, capacitors can put out a lot of power for high drain applications but do not hold much energy.


Second, within a specific chemistry, there are optimizations that can be made; however, each optimization has tradeoffs. The image above has blobs rather than specific points to show that each chemistry has a range of optimization points. A high drain alkaline battery is built with large, low-resistance wires (or other connection forms) to heat up less during high-drain applications. These bulkier connections eat up room where the battery chemistry would have been (lower capacity) and/or require less insulation (the battery drains by itself quickly over time). Whereas low-drain alkaline batteries can use fine wires to give more room for chemicals (higher capacity) or more electrical insulation (less drain over time so it lasts far longer).

 

[Lost_in_the_HTTP]

Huh?