please advice an EE idiot on using chargers

[vaklaff]

(08-01-2022 11:44 AM)mfleming Wrote:  Alkalines, regardless of brand, will always leak if left long enough without replacing. They're the #1 killer of calculators

Not a problem in my case. I use these historic calculators just occasionally, for fun. In the meantime they are stored without batteries.

(07-31-2022 08:42 PM)Jim Horn Wrote:  Why I don't recommend your choice #3 is that lab bench DC supplies are more expensive, larger, can easily have their voltage accidentally turned too high, and connecting them to the calculator's battery contacts can damage them, risks reverse polarity, precludes portability, and is inconvenient.

(emphasis mine)
Thank you Jim. I ruled #3 out and already ordered all battery holders I need.

I'm not sure if I really need chargers as well. If it's OK to use disposable AAs or AAAs then I think I'm good...