Does anyone know what the deal is with these battery charger packages being offered all over ebay? There are all these Hong Kong based companies selling 3 batteries and a charger for <$10. Is this a scam? Has anyone purchased these? thunderbolt battery | eBay they also have extended life battery combos for way cheaper than sidio. Also do you think 1700 is really going to make that much of a difference compared to 1500?