Hp-41C card reader - dead

[rprosperi]

(05-13-2020 01:54 PM)toml_12953 Wrote:  

(04-30-2020 10:54 PM)rprosperi Wrote:  I definitely recommend Energizer over Duracell batteries.

I've had bad luck with Energizers. They last about 75% as long as the generic brands from Harbor Freight and Aldi's supermarket for my calculators (HP-50, various TIs) Dollar store alkalines last about the same amount of time as Energizers for me.

I have not done too much battery life testing by brands, you could be right. But my priority is to buy a consistently-safe brand, that will not leak and damage my precious toys. I have batteries in honestly far more machines than I use regularly, just to make instant gratification a bit better when I reach for one of those machines. I've had many Duracell failures/leaks over the years, but just the one Energizer (my fault).

I don't know for sure, but I doubt that Harbor Freight or Aldi's maintain the same level of consistent manufacturing as Energizers, likely made by different Chinese manufacturers for each new order or year or batch, etc.

I may pay a bit more for the same number of playtime-hours, but it's worth it to me.

Here's a pretty good video about battery life tests for several popular brands.

https://www.youtube.com/watch?v=V7-ghrTqA44