The battery used for this camera is the NB-7L NB7L. It is available on eBay. If a new battery does not fix your problem, visit the troubleshooting page for more information. Here is a eBay link to a compatible replacement battery and charger.

Yes, here is a link to a replacement LCD for both cameras. If you are having issues with your LCD screen you can view some common issues on the G11 trouble shooting page.

We are working on a guide to replace these parts. We do not have the replacement parts in the store, but you could search for broken G11s and buy them for parts this option could potentially be cheaper. Here is a link to the trouble shooting page. We have some information about the LCD screen and Lens here. The problem with replacing the lens yourself is it will need to be calibrated with software for it to properly take pictures again. Ebay search for broken G11s