On Wed, Nov 12, 2014 at 12:28:15AM +0000, Nicola Perotto wrote:
>=20
> On 11/11/2014 23:15, RussellMc wrote:
> > 'This product is intended only for use with the high quality [tm] over-=
priced
> > batteries sold by xxx corporation.' Which may be of merit in some cases=
 :-).
> > For some values of 'merit' R=20
>=20
> My 5 years old D3ll notebook has already a very similar feature... in the
> charger: if it's not original you can charge the battery and the laptop r=
uns slowly.
> They use a 1-wire 64 bit ID chip that has low security and can be
> cloned :-)

Same here.  We use a DS2756.  One of the EEPROM bytes contains our
battery chemistry identifier.  Our charger firmware won't charge the
battery unless that identifier matches one of the algorithms we have.

Interesting things may happen if the identifier is wrong; 'cause we
support NiMH as well as LiFePO4.

We're adding LiPoly now.  I've been busily testing samples.

http://dev.laptop.org/git/users/rsmith/ec-cl4_ras/log/?h=3Dlipoly

--=20
James Cameron
http://quozl.linux.org.au/
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.