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Posted

Hello!

I trying out some Custom made LED lights. I have installed LED in the street lamp post and was testing them with the new rechargable PF batterybox. I have turned the orange nob all the way to left and are using a PF-9V cable. All LED's are connected to the 9V plug end in paralell. I have soldered on a 9V plug for each LED and each with their own resistor (470ohm, calculated for 12v).

But after a long while (not sure how long yet) the batterybox turns itself off???

I turned it on last night before I got to bed. When I woke up, the power was off and I first thought that either the battery was flat or I forgot to turn it on, so I turned it on again and there was still power on it. Left it on when I went for work. And when I came back from work this evening, it was turned off again...

I turned it on 2 hours ago and it is still giving out power.

So now I think there is some timer in there. Has anyone else discovered this? Is there a way around it?

What will happen if I left the charger on all the time? Will it hurt the batteries? Will the timer still kick in and turn the power off?

I'm suspecting some auto shutdown since there are no PF-signaling?

Posted

Yes, PF Rechargeable Battery (As well as NXT) have an internal timer of about 2hrs after which it shutdown the battery.

Is done that way by design, for security reasons! There is no way to overcome this.

I'm however not sure how it behaves if the battery is externally powered. You must try it.

Posted
  On 3/23/2012 at 5:29 PM, Conchas said:

Yes, PF Rechargeable Battery (As well as NXT) have an internal timer of about 2hrs after which it shutdown the battery.

Is done that way by design, for security reasons! There is no way to overcome this.

I'm however not sure how it behaves if the battery is externally powered. You must try it.

Oh! About 30 seconds after I had read this answer the batterybox turned itself off!

And it is exactly 2 hours since I turned it on... So yes, it is a timer there.

Now I have put the charger on, and I will see how long it stays on this time. I'll be back in 2 hours to tell the result :)

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