[HN Gopher] AA Batteries Comparison
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       AA Batteries Comparison
        
       Author : nixass
       Score  : 11 points
       Date   : 2025-10-11 19:28 UTC (3 hours ago)
        
 (HTM) web link (docs.google.com)
 (TXT) w3m dump (docs.google.com)
        
       | nixass wrote:
       | Also a video:
       | 
       | https://youtu.be/bQ_tGjXm0Ng
        
         | antfarm wrote:
         | The overall recommendation for an AA battery comes at 7:30.
         | 
         | It's the only one I buy, the white Panasonic eneloop.
        
       | jaggs wrote:
       | Old test - https://www.redferret.net/the-surprising-truth-behind-
       | househ...
        
       | logicalfails wrote:
       | While I am all for the free market, making disposable battery
       | companies label the estimated MAH on batteries would be a win-win
       | in so many ways. For consumers, the environment, waste
       | management, etc...
        
         | winrid wrote:
         | Yeah, the rechargeables always do but not most single use, kind
         | of weird that way.
        
           | jerlam wrote:
           | The alkaline discharge curve slopes dramatically, so those
           | batteries provide dramatically different voltage when new vs
           | used. Devices may or many not work at lower voltages so any
           | battery life is difficult to estimate.
           | 
           | Rechargeables provide a very flat discharge curve, providing
           | mostly the same voltage, so the steep drop off clearly
           | signals the battery life end.
        
       | watersb wrote:
       | What AA or AAA battery should I use for industrial applications?
       | 
       | I recently got a set of warning lights for car adventures. Like a
       | chemical flare light but these LEDs run on batteries.
       | 
       | It was probably a stupid idea. _Deleted paragraphs here about the
       | risk /reward balance of attempting field repairs by the side of
       | the road._
       | 
       | However, it did get me thinking about the longevity and safety of
       | AA and AAA batteries in a device that needs to be kept in the
       | car.
       | 
       | We get freezing winters, and direct sunlight in the summer will
       | strike you down. (American Southwest mountain state.)
       | 
       | What's the best battery for a digital tire gauge that I keep in
       | the glove compartment?
       | 
       |  _Should I keep it in the trunk instead? The worst of the summer
       | heat is made worse by the greenhouse effect of the car 's
       | interior._
       | 
       |  _Yes, I should use an analog pressure gauge that works without
       | batteries. I also carry one of these. The digital one is easier
       | to use and generally gets the same readings as some more
       | expensive, less portable test equipment._
        
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       (page generated 2025-10-11 23:02 UTC)