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Small Note - The voltage and polarity of the new charger must be the same as the old one but the amperage of the new charger can be higher (i.e. can be higher but not lower than the old one).
– Robert Cartaino
Commented Aug 30, 2009 at 14:43
Aren't there standards governing the polarity of the connectors? I thought the tip part was always positive.
– RJFalconer
Commented Nov 26, 2010 at 9:23
@RJFalconer - but that's only one factor.
– ChrisF
Commented Nov 26, 2010 at 9:25
@RJFalconer There's usually a symbol indicating polarity somewhere on both the laptop and power supply. It might take a bit of hunting to find, though.
– Bob
Commented Aug 22, 2012 at 11:46
My MSI GL62 shipped with an 120w adapter. As it is a bit expensive to buy a second, I use a 90w Coolermaster adapter for travel. It charges the battery fine, I just cannot go full power on the CPU/GPU, so no folding or gaming.
– NZKshatriya
Commented Feb 2, 2017 at 4:06

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```
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