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A unit does not make a quantity.
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Peter Mortensen
Peter Mortensen
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Using a lower current rated amperage brick (the 5A5 A on the 8A8 A laptop) would result in 1one of the following:

  • Melted power supply or cord, as the laptop starts drawing too much current
  • Working laptop, with little to no charging of the battery (or charging the battery, but no working laptop) as 5A5 A is enough for one, but not the other
  • Perfectly working laptop, as even though the brick is rated at 8A8 A, your laptop only draws 5A5 A (or the 5A5 A is perfectly capable of pumping 8A8 A)

Using a higher current rated amperage brick (the 8A8 A on the 5A5 A laptop) should be fine - the laptop will only draw a theoretical maximum of 5A5 A, so that's the maximum that will be put out by the power supply.

This, of course, assumes that the polarity is correct - otherwise you'll likely just go poof (or unlikely catch fire). Sometimes there's a diagram, sometimes you have to check, sometimes you just cross your fingers and pray    (latterthe latter is not recommended for expensive toys like laptops).

Using a lower rated amperage brick (the 5A on the 8A laptop) would result in 1 of the following:

  • Melted power supply or cord, as the laptop starts drawing too much current
  • Working laptop, with little to no charging of battery (or charging battery, but no working laptop) as 5A is enough for one, but not the other
  • Perfectly working laptop, as even though the brick is rated at 8A, your laptop only draws 5A (or the 5A is perfectly capable of pumping 8A)

Using a higher rated amperage brick (the 8A on the 5A laptop) should be fine - the laptop will only draw a theoretical maximum of 5A, so that's the maximum that will be put out by the power supply.

This, of course, assumes that the polarity is correct - otherwise you'll likely just go poof (or unlikely catch fire). Sometimes there's a diagram, sometimes you have to check, sometimes you just cross your fingers and pray  (latter not recommended for expensive toys like laptops).

Using a lower current rated brick (the 5 A on the 8 A laptop) would result in one of the following:

  • Melted power supply or cord, as the laptop starts drawing too much current
  • Working laptop, with little to no charging of the battery (or charging the battery, but no working laptop) as 5 A is enough for one, but not the other
  • Perfectly working laptop, as even though the brick is rated at 8 A, your laptop only draws 5 A (or the 5 A is perfectly capable of pumping 8 A)

Using a higher current rated brick (the 8 A on the 5 A laptop) should be fine - the laptop will only draw a theoretical maximum of 5 A, so that's the maximum that will be put out by the power supply.

This, of course, assumes that the polarity is correct - otherwise you'll likely just go poof (or unlikely catch fire). Sometimes there's a diagram, sometimes you have to check, sometimes you just cross your fingers and pray  (the latter is not recommended for expensive toys like laptops).

Post Migrated Here from serverfault.com (revisions)
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Mark Brackett
Mark Brackett

Using a lower rated amperage brick (the 5A on the 8A laptop) would result in 1 of the following:

  • Melted power supply or cord, as the laptop starts drawing too much current
  • Working laptop, with little to no charging of battery (or charging battery, but no working laptop) as 5A is enough for one, but not the other
  • Perfectly working laptop, as even though the brick is rated at 8A, your laptop only draws 5A (or the 5A is perfectly capable of pumping 8A)

Using a higher rated amperage brick (the 8A on the 5A laptop) should be fine - the laptop will only draw a theoretical maximum of 5A, so that's the maximum that will be put out by the power supply.

This, of course, assumes that the polarity is correct - otherwise you'll likely just go poof (or unlikely catch fire). Sometimes there's a diagram, sometimes you have to check, sometimes you just cross your fingers and pray (latter not recommended for expensive toys like laptops).