Rockbox mail archive
Subject: RE: FM Recorder won't turn on / USB left connected overnight
From: Mike Holden (rockbox_at_mikeholden.uklinux.net)
If you are unsure what you are doing, I would recommend not playing with
the liion battery in the FM, since explosions mnay occur if you get it
wrong. The FM units have a charging control chip to avoid this situation.
Arturo Gonzalez said:
> I was under the impression that the batteris on the Recorder couldn't be
> removed. Is it as easy as unscrewing the 4 screws around the blue
> When you say "limited power supply" what exactly did you use? I am away
> from all of my tools living abroad, and have limited electrical
> knowledge/experience, and so I'm a little lost and need a little bit
> more specifics...
> -----Original Message-----
> From: owner-rockbox_at_cool.haxx.se [mailto:owner-rockbox_at_cool.haxx.se] On
> Behalf Of Neon John
> Sent: Tuesday, October 21, 2003 4:53 AM
> To: rockbox_at_cool.haxx.se
> Subject: Re: FM Recorder won't turn on / USB left connected overnight
> You'll need at least 6 volts to commence a charge. 1 amp will do it.
> The easiest way to bootstrap an FMR after flattening the battery is to
> take the battery out and charge it externally. I just had to do this on
> a friend's FMR so that he could get his stuff off before returning it on
> extended warranty.
> I simply hooked both batteries in parallel by taping copper wire across
> each end and then hooking the battery to a current limited power supply.
> I set the current to one amp and allowed it to charge for an hour. That
> charges the battery about half way, more than enough to get the thing
> running again so that the internal charger can take over.
> FWIW, this FMR that I had to work on had its battery charging circuit
> fail. That's why it's going back. That's the last one of the several I
> caused to be bought several months ago. We all now have Recorders and
> could not be happier.
> John De Armond
> johngdDONTYOUDARE_at_bellsouth.net http://bellsouthpwp.net/j/o/johngd/
> Cleveland, Occupied TN
> On Mon, 20 Oct 2003 13:51:18 +0200, "Arturo Gonzalez"
>>Hello to everyone.
>>My girlfriend left the rockbox connected via USB to her laptop
>>overnight, and predictably, the unit has fully drained batteries.
>>I've read the archives and found a similar incident, but didn't see in
>> the various threads how this was eventually resolved. (1) Do i charge
>> the unit using the charger (I have the original US charger, but am
>> living in Spain, where the charger won't work (I need one that accepts
>> EU voltage)--do i buy the one Archos Tech support is selling or can i
>> get one with the same specs?: Power Specifications : Input : 100-240Vac
>> Output : 5 Volts 1.6 A
Rockbox page: http://www.mikeholden.org/~rockbox
Page was last modified "Jan 10 2012" The Rockbox Crew