dv7 charger voltage question

[tstinson]

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?

[banhien]

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,

[tstinson]

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?

[banhien]

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,