Wolfman wrote:If you buy a replacement charger for laptops, you must make sure that the voltage matches the original as it can end up burning out the PC completely!, even a 0.1 MA increase in power can make a major difference!.
I would take issue with that assertion. Current is what can be drawn, if the computer, at any one time, only needs 2 amps, it will only draw 2 amps. If a computer, whose PSU is rated at 3 amps, and you use instead a PSU of the same voltage but capable of supplying 5 amps the computer will be fine if it is only drawing 2 amps, and OK up to 3 amps, but if you load it with peripherals and it starts to draw 5 amps, then it will be in trouble, as the internal circuitry would not be designed for that load. Over-voltage is, however, a problem.
The psu I am using is a Toshiba one rated at 15V @ 5A Max (75 Watts), the input is the same, the 15.3V I measured was not under load, I would expected it to drop when actually powering the computer. I suppose I could find a 15V torch bulb, or 10 LEDs in series, and see what the voltage is when under load.
After 10 hours charging overnight it is now showing 46%, and I could leave it plugged in all day and it wouldn't change, yet, run it down and recharge it and it might, tomorrow, show 36%, 46% or 60%, there's no way of knowing; "Erratic" make the problem more difficult to diagnose.