Help needed in modifying headlight - RX 135

Hello Guys,
I have Yamaha RX 135 from past few years. The stock headlamps are very weak, to work properly in the night.
I searched forums for improving those headlamps, and found few threads. Those threads are very old, and none of them provide exact information I am looking for.
So I am requesting here, ways to improve stock headlamps.

1. Is it advisable to wire headlamps directly on battery, instead of dynamo? Will that affect battery life severely?

2. Is installation of HID lamps possible via any mods in electric circuits? Will battery able to handle that load?
If not, can I modify/upgrade the battery to handle the additional load?

3. Any other suggestions to improve stock lamps?

4. I am currently living in Pune. I hear there are several shops in Nana Peth. Any fellow xBhp member can recommend particular shop?
I heard from someone, 'Tilak Auto' in Nana Peth might be able to do that. Does anybody has experience from that shop?

I would greatly appreciate any pointers you have.

Thanks!