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I have a Dell XPS-1530 laptop with a 9 cell battery. It's working fine but I was just wondering whether I could use a power connector or something to plug my laptop charger's 3 pin plug into another connector and to a USB power bank connector? as Laptop power banks are very expensive and are rarely available as compared to smartphone/tablet power banks with same capacity in MilliAmpereHour. :(

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    mAh is not a good unit for comparison. The actual unit of capacity is mWh, which includes the effect of voltage. Laptop power banks have higher voltage output, and therefore significantly higher real capacity even though mAh are the same.
    – Ben Voigt
    Commented Dec 9, 2015 at 5:20

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Smartphone/tablet power banks are not designed to charge laptops. You need to go with a laptop power bank or an UPS.

Even if you manage to get something to connect your laptop charger's 3 pin plug into another connector which will connect it to a USB power bank connector, there is no way to deliver the power to the laptops battery using the power bank's USB port. The laptop's USB port do not delivery power to its battery, in fact quite the opposite happens. The laptop's USB ports delivers power to the devices which are connected to it to keep them functioning. The charging circuit of a laptop's battery are only connected to the charging port of a laptop.

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  • well, You completely misunderstond what I am asking. I also know that a laptop's USB port doesn't have the capability to intake power. it gives out power. I am not asking to charge my laptop using USB. my 3 pin charger works fine and I am trying to find a way to use that with a USB power bank. please try reading the question again and let me know if it's not clear. I will explain it in more detail. Thanks You very much for your reply :) Really appreciate it :)
    – LucKy
    Commented Feb 28, 2015 at 22:57
  • ie, I am trying to find out if it's feasible to use a connector in between. as maybe their might be voltage difference or something else. I don't want to fry anything up :D
    – LucKy
    Commented Feb 28, 2015 at 23:01
  • So you are basically trying to connect your power bank's USB power out to your laptop's charger and then connect this setup to your laptop's charging port, right?
    – Ayan
    Commented Mar 1, 2015 at 0:46
  • yes. power banks's USB connects with 3 pin of the charger and then the charging pin of my charger goes into the charging port of the laptop :) do you know if it's possible? Thank You :)
    – LucKy
    Commented Mar 1, 2015 at 8:51
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    That is not feasible. Laptop chargers takes AC input then converts it to DC output which is feed into the laptop. The power banks do the same thing its output is DC. So the problem is the output from your power bank which is DC will be feed into the AC input of your charger. Now there are ways to convert DC to AC and vice versa but it is not so easy. You will need to match your chargers input which is 100-240V/~2.5A 50-60Hz by converting the DC output from your power bank.
    – Ayan
    Commented Mar 1, 2015 at 10:06
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I am sure it's very possible check on ebay you will find connectors (cables) check those that have a USB to 3 pin plug. However, most laptop batteries have energy storage capacities averaging 5000 mAh, for example HP notebook battery has 4300mAh capacity.Hence, you would need a power bank with a higher voltage at least above your laptop battery capacity to sustain your your laptop charging; those above 12,000 to 20,000 mAh could work best. As you rightly put it the power (output) coming from your power bank is already in DC form at least most power banks I know have DC power output just like your laptop charger. Thus I do not see why you need AC- DC convertor as suggested by others I stand to be corrected. However, for safety reasons of your laptop battery, I urge you to have a tester to check the energy level coming from your power bank as too little of power may not ably charge the laptop battery while too much may burst your laptop battery.I hope this helps you.

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  • Dell XPS-1530 charger outputs 19.5V/4.62A thats around 90W of power. While a typical power bank outputs around 5V/2A of power thats around 10W of power. So you can clearly see the difference in the amount of power from from both the sources. The AC - DC converter was actually not suggested by me. I just mentioned it as it was necessary for me to explain the OP how to connect the power bank's DC output to the AC input of the laptop's charger. Because the OP actually wants to connect the output of the power bank with the input of the laptop's charger.
    – Ayan
    Commented Dec 9, 2015 at 5:49
  • To verify the above mentioned power outputs, please go through these links. Power output of Dell XPS-1530 charger and a typical Power Bank.
    – Ayan
    Commented Dec 9, 2015 at 5:54

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