HP-32E Advanced Scientific Calculator - my first Spice machine

[Dieter]

(11-16-2016 03:53 PM)jebem Wrote:  A quick search shows https://www.panasonic.com/global/consume...story.html info that you probably saw already, although these mid 80's Panasonic 1000mAh were not standard AA in size:
In June 1985, the first SM30 model P-100AAS entered mass production, an AA-long-type (diameter 14.5 mm x height 65 mm) with a capacity of 1,000 mAh­―30 % more than existing types with a nominal capacity of 750 mAh.

That's not AA, that's 5/4 AA. Of course this bigger size allowed more capacity. The mentioned 750 mAh rating most probably also refers to 5/4 AA. The P100AAS I referred to was a regular AA size battery.

Another alternative was size A (not available as a regular consumer battery), which is only 2 mm thicker than AA but it made 1000 mAh possible long before it was available in AA size.

(11-16-2016 03:53 PM)jebem Wrote:  But we agree that 700mAh were common in mid 80's.

Let's say: the late Eighties. Around that time (1990) the first NiMH batteries became available. At that time – in regular AA size – with capacities between 900 and 1200 mAh, which was 1,5...2x the usual NiCd rating.

Dieter