In this video I talk about my homemade Canon DSLR external LiPo battery adapter. With this hack* you can replace a Lithium BP-511 battery with a modified Canon DR-400 adapter and a 2S LiPo Battery. This is great for recording long duration timelapse sequences in cold temperatures. I also show how to use an inline Watt's Up power meter to monitor the voltage on a 2S 5500 mAh LiPo battery.
*I'm using the term hack in it's original meaning - as an electronics hobbyist who modifies an existing piece of hardware with a soldering iron to turn it into a new device or invention.
When modifying a DC power cord it is important to use a polarized power connector like the standard red Deans plug. This will help to protect your camera from reversed DC power. I would only recommend a DSLR LiPo battery pack mod to a person who is very comfortable with electronics and soldering. Make sure to test everything TWICE with your multimeter before plugging in any cords!
You can check out my Winter in the Barrens Timelapse that was created with the help of this power adapter.