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Subject: Re: iriver 320 battery usage

Re: iriver 320 battery usage

From: Mike Holden <rockbox_at_mikeholden.org>
Date: Wed, 18 Oct 2006 11:18:15 +0100 (BST)

Comments in-line, see below

Manuel Dejonghe said:
> Hi Paul,
>
> I'll answer point by point, as far as I can:
>
> 1. I think it's been tested that rockbox consumes even less power than
> the original firmware. Of course, enabling the speech/voice rises it a
> bit, but that's not much. At least not on the iriver.

There is still a bug that the estimation of runtime left is wrong. You can
approximately double this, so if it says you have 3 hours left, you really
have about 6!

> 3. rockbox will, like with the power adapter, not start automatically
> when the external battery pack is attached, but it will, of course, take
> advantage of it to charge the internal battery.
> Once you started the player, you can plug in either charger or battery
> pack. It's just that if you plug them in before the player was switchen
> on, it will then switch on, due to that, and boot directly into the
> iriver stock firmware.

I'm not sure the powerpack will charge the battery, as it will supply less
than 4.5 volts (4 x AA batteries). Nominal voltage for charging is 5v. It
will power it but not charge it, or at least not significantly. I have
used a 4.5v wall-wart in the past, and charging happened a bit, but
certainly not a full charge. The battery backpack should show similar
characteristincs to this.

> 5. Yes, the disk cache will help, since you are powering off the hard
> disk completely. So the disk does not need to be repowered to browse
> directories.

This will depend on your usage of the player. If you browese round
directories a lot, this will help. However if like me you play a lot and
browse very little you will lose out. This is because the dircache
consumes memory that could otherwise be used for cacheing music playback,
thus your disk will spin up more often to load music data ready for
playing.

-- 
Mike Holden
http://www.by-ang.com - the place to shop for all manner of hand crafted
items, including Greetings Cards, Jewellery and Gifts
Received on 2006-10-18

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