Safely charging my 65

[rprosperi]

(03-21-2015 03:05 AM)Don Shepherd Wrote:  Brad, you could try this.

I have never used one, but it sounds like it lets you charge your 65 battery outside of the calculator. I have always charged my 65 battery in the calculator using the standard AC adapter, and have never experienced a problem. I think the key is to never operate your 65 from the AC adapter with no battery being present in the calculator. I think that's the situation that will ruin your calculator.

The charger that Don suggests works very well, I fully endorse getting one. BTW, this one is rather expensive, you can get them much cheaper if you can wait and watch auction sites, flea markets, CL, etc.

HP made external chargers like this for:

* Classic series batteries (this one) - common
* TopCat batteries (9x desktop calcs, 82143A Printer, 82162A Printer, 82161A Tape Drive) - less common
* Spice calculators - rare - no idea why; guess they didn't sell well
* Woodstock calculators - less common

I have and use all of them. They provide the dual advantage of charging a 2nd battery while using another, but much more importantly it prevents damage to the valuable calculator should the aging battery fail or leak during unattended charging.

Recommended!