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Subject: RE: FM Recorder won't turn on / USB left connected overnight

RE: FM Recorder won't turn on / USB left connected overnight

From: Mike Holden <>
Date: Tue, 21 Oct 2003 10:34:20 +0100 (BST)

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
> cushions?
> 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...
> Thanks.
> -----Original Message-----
> From: [] On
> Behalf Of Neon John
> Sent: Tuesday, October 21, 2003 4:53 AM
> To:
> 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
> ---
> John De Armond
> Cleveland, Occupied TN
> On Mon, 20 Oct 2003 13:51:18 +0200, "Arturo Gonzalez"
> <>
> wrote:
>>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
>>50-60 Hz
>> Output : 5 Volts 1.6 A

Mike Holden
Rockbox page:
Received on 2003-10-21

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