I've got a Galaxy Nexus and I game and browse the web a lot, so I really need some extra juice sometimes. I'm thinking about getting cheapo batteries from Ebay. They're like 4-5 us dollars and some claim to be 2000mah or more. I know that they can't be that high capacity but if I bought them and used them, can they damage my phone somehow? Fry the circuitry or something :P
Wrong... Galaxy Nexus's battery is replacable.