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> I've Another Idea For The Spare Md Slot In C1k, Ectra juice for the bettery
post Aug 4 2007, 11:42 PM
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I've noticed that the nokia BL-5C Original battery is:
it's a Li-Ion just like the Z battery and has the same nominal tension,
it's nominally 850mA/h,
very light (will not impact much on overall weight),
just slightli thicker then a standard CF,
without the plastic enclosuer it's also about 3 mm longer then a CF.

So overall it should fit in the space left bay the missing MD and add an extra 50% battery life which is not bad.

Next time I open it up I'll check ... I also need to get another BL-5C battery to dismantle out of the plastic casing.

Now some more conciderations:
is it safe to have another Li-Ion in parallel with the standard Z battery ?
will the different capacities of the batteries cause any trouble ?
can the internal charge circuitary handle the 2 batteryes in parallel ?
how long will it take to charge the 2 batteries (currently my C1k charges overnight ... I fear that the night will not be enough for bothe) ?

Any conciderations are wellcome ;-)
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post Aug 6 2007, 01:29 AM
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Posts: 471
Joined: 21-May 06
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Balls... I did not think about that....

But I've a solution:
deciding whether the standard battery gets charged is just a matter of putting it in the slot or not so I do not think it's necessary to have a second spare GPIO pin for choosing this,
drop the stuff about allways deliver and select when charge .... we could have connected or disconnected trough software (the applet is out of my programming skills ... if I do this it will be trough a command line {leave the applet to some devel guru}),
charge status of the single battery is difficult because the detent circuitary is only for one battery and not for two ... but if you disconnect the standard battery and only leave the extra one in you may get relatively accurate reading of the extra battery.

There is some side affects:
if you are running from the extra battery alone and you soft switch off the extra battery you will crash the system along with maybe other undesired effects,
if you forget to soft switch on the battery before replacing the standard battery (and external power is not connected) you would have a system crash anyway.
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