I see that some third-party camera battery chargers available from the likes of eBay seem to come with a 12V car input lead as well as a mains lead. My Canon LC-E8E (for LP-E8 batteries) came with a mains input lead only. Does anyone know whether a car adapter is available for these chargers, or whether it would take a simple 12V DC input in place of the 24V AC (as the third party ones seem to do)?