Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Um so I got my cord an hour and a half ago and my powerbook g4 a1138 is not showin any signs of being charged. How much time does it take?
Document: The charger works with my mac powerbook g4. It didn't cost much and works great. I recommend it to anyone who needs a replacement charger.
I have ordered this product because I bought a powerbook g4 but it did not have a poer adapter. The product shipped fast and got to my door before the estimated arrival. I than pluged it into the powerbook and it worked perfectly. It also does not get hot after hours of use.
Got this yust to try it out on my powerbook g4 yust to see if my laptop was working still and it was. This is a great replacement charger for your powerbook g4. I didnt really try it out on my battery since my battery is dead. I would recommend this to anyone needing a back up charger! !
I bought this cord for my Powerbook that I still have and use and it works perfectly with it!! My old cord literally started heating up so this was a good replacement for it!! Works well and keeps my laptop charged.
The adapter cord wa shipped very quickly and works well - so long as it's plugged in and not moved. Seems like the fit is not very tight and any slight movement of the laptop causes the cord to be loose and it won't charge. There is no blue light to let me know if it is charging or not. So I pretty much have to plug it in firmly and leave it alone until it's charged.
The power cord for my computer broke. My daughter found this one for me, ordered it and got it to me. My computer was up and running in no time. What a relief that was. Price was excellent also.
i have a first generation apple PowerBook G4 i picked up at a yard sale for $10. no cord and the battery was dead. so i searched Amazon and found this one. i figured for $5.00 and an extra $15. for express shipping what could i loose. i plugged it into the laptop [sorry apple] and it charged it to 100% in less than 3 hours. now if i can only figure out how to use this OS X tiger software.
Got a replacement charger for an older Mac G4. It was shipped on time. Packaged nicely. Works like a charm. Fair price. Great service. That's all I can ask. Thanks!
I figured there wouldn't be much to complain about and there wasn't. I knew what I needed and this was it. Works fine got here quick. Its all good.
This charger does what it is suppose to, it works. My IBOOK charged up just fine and though it is an archaic piece of junk, its my junk and I love it, hence the new cord.
Answer: I would expect a few hours for a full charge. What indicators do you have of battery level? There are indicators on the bottom of many packs. Push the button and see how many lights show. Also, if you are using your computer heavily with screen at full brightness, a lot of the juice will go into running the laptop. There won't be much left to recharge the battery. You might try putting it aside to sleep for an hour and checking back later. Of course, if the battery is bad or the calibration is way off, that is another thing. If you charge a sleeping computer all night and only get 30 minutes of use before it's dead again, that's not good. There are ways to address that but someone else may know off the top of their head.