Re: 14 years awaiting!
- From: "John H Meyers" <jhmeyers@xxxxxxxxxxxxxx>
- Date: Tue, 07 Oct 2008 11:42:40 -0500
On Tue, 07 Oct 2008 10:47:33 -0500, S.C. wrote:
Putting a Li-ion cell into a AAA form factor...
No one suggested using the identical form factor of an AAA cell for Li-ion,
only that the fact of a product being designed to use some standard
might be important to the useful lifetime of the product.
Rechargable Li-ions are usually molded to whatever shape the product
is in to maximize its capacity. They do this to squeeze the battery
into ever-thinner electronic devices.
Watch batteries (and even thin calculator batteries)
likewise needed to be squeezed into ever thinner watches and flat calculators,
but this managed to get done in a way that produced standardized sizes
(some for 1.5v, others for 3v), which are still available
(except at Wal-Mart, which doesn't recognize the existence of size "389" :)
A universal standard would be nice, but then different companies
would argue over what exactly that standard should be.
Has always been true of everything, yet has been overcome most of the time;
even some of HP's special battery packs (including those which were
part of the case) used standard cells which could usually be replaced.
http://www.batterycrossref.com says that there even exist
standardized rechargeable lithium ion coin cells, with sizes
(LIR1620, LIR2016, LIR2025, LIR2032, ..., LIR3048) suggesting that
these may be the same form factor as 3v non-rechargeable lithium cells;
some other, more easily "packed" larger call sizes and shapes
(e.g. rectangular) could easily be conceived,
with whatever additional contacts (or electronic elements) might be useful.
Need a few thousand LIR2450?
http://www.alibaba.com/product-gs/204542313/3_7V_rechargeable_button_cell_LIR2450.html
"Supply Ability: 500,000 Pieces per Week"
-[ ]-
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