Just as an FYI, I bought one of the ultra cheepo units to carry as a back-up and DC charger, it is the “Zeikos ZE-CH945 Battery Charger for Canon 945” https://www.amazon.com/gp/product/B001T9N10C/ref=oss_product
It does charge the batteries and for my purposes is fine, however, it does not appear to vary the charge rate or to shut off at full charge (although I’ve been loath to leave the batts on too long, so I’m not positive of that, there was no documentation with it). It weighs about 10% of what the Canon charger weighs so obviously is missing a lot of circuitry. To my mind it’s just a raw battery charger, so if you have good batteries you want to protect, you need a smart charger. On the otherhand, if you’re using knock-off batteries anyway and need a cheap solution, it does work.
Jeff Mueller
http://www.ApertureVideos.com
Santa Barbara, CA