Rockbox mail archive
Subject: Re: FM Recorder won't turn on / USB left connected overnight
From: Neon John (johngd_at_bellsouth.net)
On Mon, 20 Oct 2003 13:51:18 +0200, "Arturo Gonzalez" <agon_at_email.arizona.edu>
>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
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
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
John De Armond
Cleveland, Occupied TN
Page was last modified "Jan 10 2012" The Rockbox Crew