I have canon camera model s 500. want new battery and also tell me the battery no of this model

You can find a new charger by searching for your camera's model number (add the word "charger") on Amazon, but it might be better to get one of the "universal" chargers instead. There are several makes of these, that will charge any of the small lithium batteries used in cameras and phones, so you won't have this problem again. And the universal chargers are often cheaper than the ones dedicated to a single battery type.

If your camera came with a charger for the battery, then it is unlikely that it will charge from the USB lead.

You can download the manual and order a battery charger from the manufacturer's web site at
www.usa.canon.com/cusa/support/consumer/digital_cameras/powershot_g_series/powershot_s500

You can order a Canon NB-1L battery pack from here. If you're willing to go with third-party batteries, you'll find a selection here.

You're using alkaline batteries. No matter how much you pay for alkaline type batteries, they just cannot cope with the amount of power that a digital camera needs - especially an older model. Use a type called lithium AA, energiser make a very good version. You can usually buy them in camera shops, and they can be a little pricier, but the camera will take between 300-500 photos per set, so worth it. If thats not possible I would suggest using rechargable batteries with a charger - the higher the number the stronger the battery. 2100mAh to 2900mAh should be okay for a camera, and the best type is niMH (not niCD). Good luck.

if the picture is being recorded and only the play backscreen is not working then you will have to have the playback screen or associated electronics repaired. If the camera is not even taking pictures or playing back then the camera is broken beyond economical repair. Canon will charge about $125 for a rear screen repair and about $150 or more for a sensor repair. New models better than the one you have start at $299.

PowerShot S500. And note that if you're experiencing image problems with your ixus500 camera, this is a very common problem for your camera, and Canon will fix the problem for free. This is regardless of your camera's warranty status. Please check this link for more info.

Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110, IXUS V2/300/400/430/500, IXY Digital 30/30a/200a/300a/D320/400/ 450/500

This sounds like it might be a defective CCD imager. If so, Canon should fix this for you for free, including free shipping both ways. I'm sure there's a UPS station nearby you. This is regardless of your camera's warranty status. Please check the following two links for more info:
　
http://camerarepair.blogspot.com/2007/11/canon-digital-cameras-showing-black.html
　
http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=225&modelid=13390&keycode=2112&id=29819

Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110, IXUS V2/300/400/430/500, IXY Digital 200a/300a/400/450/500

This sounds like it might be a defective CCD imager. If so, Canon should fix this for you for free, including free shipping both ways. Shipping is via UPS and FEDex This is regardless of your camera's warranty status. Please check the following two links for more info:
　
http://camerarepair.blogspot.com/2007/11/canon-digital-cameras-showing-black.html
　
http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=225&modelid=13390&keycode=2112&id=29819

Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110, IXUS V2/300/400/430/500, IXY Digital 200a/300a/400/450/500

This sounds like it might be a defective CCD imager. If so, Canon should fix this for you for free, including free shipping both ways. This is regardless of your camera's warranty status. Please check the following two links for more info:
　
http://camerarepair.blogspot.com/2007/11/canon-digital-cameras-showing-black.html
　
http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=225&modelid=13390&keycode=2112&id=29819

Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110, IXUS V2/300/400/430/500, IXY Digital 200a/300a/400/450/500

For both of your cameras, this sounds like it might be a defective CCD imager. If so, Canon should fix this for you for free, including free shipping both ways. This is regardless of your camera's warranty status. Please check the following two links for more info:
http://camerarepair.blogspot.com/2007/11/canon-digital-cameras-showing-black.html

http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=225&modelid=13390&keycode=2112&id=29819

Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110, IXUS V2/300/400/430/500, IXY Digital 200a/300a/400/450/500

I highly recommend that you follow up on this, especially for the SD110. I think you'll be very satisfied with Canon's excellent customer service!