How to power Airtel/BSNL Modem from laptop ?

6 posts · originally from https://geek.digit.in/community/threads/how-to-power-airtel-bsnl-modem-from-laptop.119990/

Hey guys,

A very simple question, Is it possible to pull power from USB port (2.0) of laptop & power on Airtel/BSNL Modem ?

Reqirement is simple - There is no UPS & one needs modem to work incase of power cut. Laptop has 2 USB ports & gives 2 hours of battery backup. if I am not wrong Modem will work on around 9V of power.

Will it be possible to make modem work by taking power supply from USB ports of laptop ? if Yes, HOW

Anyone got an idea on this ?

The USB output voltage is around 5V. So if your modem req. 9V, it will not work.

^ I've actually used my Beetel 220BXI modem with my Telephone's 6V adapter.

But the question is, where can you find a cable whose one end can be connected to your modem's power supply and the 2nd to the USB port. Extremely difficult to find.

ico said:
^ I've actually used my Beetel 220BXI modem with my Telephone's 6V adapter.

Can you pls tell how did you do that. Have the same 220 BX

usb is dc o/p...the modem may have ac input...i think u need converters

but my modem smartax is 9v-1a ac rating...i guess so much current cant be supplied by usb...