Question Risks when using a Lower Voltage but Higher Amperage charger ?

[VenB]

I have an HP 15-ba009dx laptop that takes in 19v and 2.31 amps. I also have an adapter with 15v and 5 amps, what would happen to the laptop if I used this ?

 

[SkyNetRising]

If voltage is too low, laptop wouldn't charge.
If voltage is too high, then laptop charging gets fried.

You can use only correct voltage charger, so ~19V only.
Amps determine speed of charging. With higher amps charging goes faster.

 

[Phillip Corcoran]

If the laptop's original charger/mains adapter is lost or faulty, you must replace it with one that has the exact same specifications, otherwise you risk damaging your laptop.

 

[BFG-9000]

Nothing should happen, because it won't be recognized as a Genuine charger and thus won't charge. Just as with printer cartridges, the 3rd party aftermarket suppliers have to connect a special circuit, here to the sense pin, which doesn't always work as it's undocumented and thus reverse engineered. Even if it works it will only do so with a limited number of laptop models.

Chargers and lithium batteries can burn your house down if the smallest things go wrong, and since even the genuine ones from big name brands have been the subject of many fires and recalls, why take that risk? At least those cheap USB chargers will only kill you. Get a used, genuine charger after checking if it's been recalled.