I use extended for double batteries, Phottix, Made in China... so it's not expensive.
Here is the interesting things :
- Some already noted, the heat of batteries less influence to the camera, camera become less hot, less error for a reason of hot.
- In one pack, there is a bonus : second cartridge for 6 x AA batteries, it's useful if in the remote area/little town where we can not find LP battery, we can use also 6 rechargeable batteries but it's not good result. Much more for emergency situation with 6 alkaline batteries it's work very well.
- After a while, I modified this cartridge. I soldered a cable going outside from this block, I put a XLR 4 points connector as a common on the bigger camera, and I can use many different power supplies.
There are many circuit for these pins and NO common agreement between different camera (SONY, etc). So, I compare between many marks, which are the common. I use 2 points for the EOS camera itself, 9 volt. The others two for 12 volts, which very common in car or anything else.
I make converter from 12 volts or above to 9 volt, so I can recycle many source of power supply.
Now I can use :
- Power supply 9 volt from the old printer, for time lapse.
- With converter, I can use old batteries from SONY broadcast camera; in the SONY big camera will last 20 minutes, in DSLR can be 3 hours. The cheap battery is for the drilling machine, which bigger than LP battery, more power, less price, or recycle from the similar tools.
- I can use also the old big accu from the car (the new will be 40 Amp), I used already many times, many days for time lapse and still a lots power rest there
. I put on the roof. I use also little accu which more common on motorcycle. It's less heavy.
- I can use also the charger for battery, either 9 volt or 12 volt a kind for Anton-Bauer battery big camera, for long indoor interview, that's look clean.
- The reason using XLR 4 points connector is because for security and reliability. It's less risk if someone without knowledge of electronics help me. Just plug. Another reason is I have some long cable XLR-XLR 4 points already, and some power supply from SONY.
I hope this give some idea for you who like soldering. Greetings.
