Finally I got my HP-67!

[Dave Britten]

(01-08-2020 09:44 PM)Artur - Brasil Wrote:  

(01-08-2020 08:18 PM)Dave Britten Wrote:  Personally, I like sticking with the NiMHs. There are a ton of non-standard Li-Ion battery packs, but NiMH AAAs or AAs are easy to find. I never charge them inside the calculator; I use a modern charger that charges and monitors each cell individually. I'm getting great run time on my 65 with Eneloop AAAs, even with quite a bit of card reader use. Plus lithium batteries tend to be much more of a fire hazard.

The charger I bought can handle a variety of Li-Ion barrel-style cells (rather than the flat-packs used in most phones). I wonder if any of those would be small enough to fit inside the calculator with a holder similar to what's available for AAAs.

I do understand you, but see advantages: you won't need an special charger neither remove batteries from calculator (or accessory).
About flat-battery, they are smaller and fit in every place.
Aboubt fire, yes, it's possible, I have to admit.
Well, it's a personal decision at all. But I don't regret about replacing Ni_MH or NI-Cd for Li-Ion.

Now, I'll fix the card reader!
Cheers!
Artur

Yup, it's pretty cool, so don't let me stop you.