PowerBook G4 - Connect PSU directly to battery connections ?

Discussion in 'PowerPC Macs' started by LCR, Feb 22, 2011.

  1. LCR macrumors newbie

    Feb 22, 2011
    I have a PowerBook G4 1.67GHz Hi-res Dual-layer, the last model with digital audio out.

    The DC-in part has died, but the USB and audio-out is ok. The machine runs fine on battery but takes no charge whatsoever from the charger. The LED doesn't shine at all on the charger plug.

    I also have a shortage of batteries so I thought I could use the machine as an audio player utilising the digital audio output, so my question is:

    Can one connect the PowerBook charger directly to the battery connections ?

    thus bypassing the DC-in port/problem and eliminating the need for a battery.

    Which connections ?

  2. MacHamster68, Feb 22, 2011
    Last edited: Feb 22, 2011

    MacHamster68 macrumors 68040


    Sep 17, 2009
    usually apple laptops run without battery direct from mains ac power , have you tried resetting pmu
    http://support.apple.com/kb/HT1431sometimes it helps to make the Powerbook remember again that there is a charger connected and a battery and whats it supposed to do with these parts , as some just get senile over time and just forget

    if not sorry cant tell you which connector and how much voltage and ampere each gets , but in theory it would be possible even without battery to run direct from a charger through the battery connectors , maybe someone has tried that already , but most just get a new logicboard or the old one repaired or a refurbished one , they turn up on ebay regular for not to much money and make it a laptop again thats portable if the needs arise , while one mistake with fiddling with connectors and chargers and possible resistors , as i dont know what voltage each pin of the battery is using and what ampere , so getting that wrong could cause more harm then good as its not as easy as its sounds or is it ? as far as i know there are coming 6 pins from the battery at least 2 are for charging coming from the dc in part which can be forgotten in your case ,so the rest must be for feeding certain parts with a certain voltage and amps
  3. j-mods macrumors newbie


    Feb 16, 2011
    Uinted Kingdom

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