Laptop PSU - should I use 18V or 19V?

You might fry it going with a higher voltage. Look on the bottom of your laptop, it should have the specifics for input voltage & amperage. For example, mine is "19V and 4.74A". To use any other types, higher or lower, will eventually cause damage or render useless either your battery or your laptop...or both. Check sites like: http://www.laptopacadapter.com/ for a possible low-priced replacement for your original.

the finished output is what concerns. right this is the formulation. Volts x Amps = Watts. First, you need to by no skill use a brick that would not positioned out the comparable Wattage as what the laptop demands. 2d, you need to by no skill use a brick that would not positioned out the comparable Voltage as what the laptop demands. Voltage is fairly like the potential of the present. Amperage is fairly like the quantity of modern. So, you desire to skill a 19 volt laptop, with a weaker modern than it desires. this would make the laptop ought to paintings extra sturdy than it is meant to... if in any respect. The battery will possibly no longer value at the same time as the unit is getting used.. or the laptop would close down everytime you carry out a processor in intensity action... ot the laptop would overheat, or the inverter would burn out as a results of no longer having the voltage it desires. I understand which you purely wanna plug it in and use it. and you recognize what, in case you try this, it might purely paintings effective for a at the same time as... yet what occurs while it abruptly purely stops working, and could no longer turn returned on? you may get a substitute brick for that laptop, for between $10 and $20 on Ebay. seek for the make, and type laptop, with the phrases skill Adapter after them... as an occasion, if it became a Toshiba satellite tv for pc A75-S231 you will seek Ebay for Toshiba satellite tv for pc A75-s231 skill adapter and you will see how value effectively you may get the skill brick that your laptop desires. end of line