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tstinson
Posts: 2
Member Since: ‎10-27-2011
Message 1 of 4 (4,581 Views)

dv7 charger voltage question

Just got a new HP Pavilion dv7-6b55dx and checked power supply adaptor to see if adaptors from my old HP Pavilion dv9930us would work.

First thing I noticed is the plug ends differ between the old and new adaptors.

I then found that the output of the adaptor for the older laptop is 19 volt / 4.74 amp / 90 watt, whereas the output of the adaptor for the new laptop is 18.5 volt / 3.5 amp / 65 watt.

 

QUESTION:

Is the output voltage/amperage difference between the older adaptor and the new laptop an issue?

Would the old adaptor work on the new laptop - IF a dongle to adapt the old adaptor plug end to the new laptop receiver?

Provost
banhien
Posts: 35,312
Member Since: ‎01-29-2009
Message 2 of 4 (4,579 Views)

Re: dv7 charger voltage question

Hi,

 

  • For the voltage: equipment can happy to work with plus/minus 5% therefore 18.V or 19.0V should be ok
  • For wattage (and ampere): higher is better that why they are more expensive. The downside is they are heavier.

 

Regards,

BH
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Honor Student
tstinson
Posts: 2
Member Since: ‎10-27-2011
Message 3 of 4 (4,577 Views)

Re: dv7 charger voltage question

Thanks for quick response.

Do you know if an adaptor is available for the different plug end on the old adaptor to fit the receiver on the new laptop?

Provost
banhien
Posts: 35,312
Member Since: ‎01-29-2009
Message 4 of 4 (4,575 Views)

Re: dv7 charger voltage question

Hi,

 

Sorry I don't know but I know on the market today there are few changers which can be used for many machines from different vendors such as this one. It has many different tips.

 

Regards,

BH
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