Anelok: saving more power (1/2)

Ron K. Jeffries rjeffries at
Thu Apr 30 12:19:23 UTC 2015

Cost (and nearly universal availability, e.g. when on travel) of selected
battery is one factor to consider.

An equally important issue IMO is effort ("hassle factor") of needing to
change anelok battery. A longer interval between battery replacement is
certainly desirable.

If the battery is not rechargeable (I understand reasons you prefer
non-rechargable) here's the key question:
"What replacement interval is long enough to not annoy users so much (so
often) that it outweighs the value add of a secure password safe?"

You want to sell a LOT of anelok (one would assume). My sense is it will
appeal to a wide audience. Selling 100,000 units would not shock me. If the
user experience is excellent, your sales could be in the million+ unit

Ron K. Jeffries

On Thu, Apr 30, 2015 at 2:29 AM, Werner Almesberger <werner at>

> Ron K. Jeffries wrote:
> > What do people who will purchase and use anelok consider a minimum time
> > between required battery changes?
> By the way, regarding the cost of batteries: CR2032 can be quite
> expensive if you buy them one at a time, but you can get much
> better prices if you buy a few.
> For example, after running out of my old stash I found a shop a
> few blocks from my place that sells a box of 100 CR2032 cells
> for ARS 500 (USD 39-57, depending on which exchange rate you
> apply).
> If using them just for Anelok, this box of cells should easily
> outlive me. Now compare this with the overall costs caused by
> rechargeable batteries that only last a small number of years
> and then need expensive replacement or even a new device.
> For alkaline AAA, more frequent shopping experiences would be
> needed because they self-discharge faster than CR2032 and will
> eventually leak. But we're still talking about years between
> trips to the shop if you don't mind keeping two or three
> batteries in a drawer.
> - Werner
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