How long would this run on this battery?

[mymax]

I have one of these:
http://www.rangevideo.com/index.php?main_page=product_info&cPath=35_21&products_id=24

It says it's rates power cunsumption is 300mA's.
How long will it run on 80% of let's say a 1000mAh LiPo?

I am leaning towards one of these:
http://www.advantagehobby.com/product.php?productid=51256&cat=343&page=1


I'd like to make sure I have enough juice.
I'm planning on using it for more than RC stuff. So if I can get a formula, I can know what I'm looking at for time.

Thanks!

[r40734]

I have one of these:
http://www.rangevideo.com/index.php?main_page=product_info&cPath=35_21&products_id=24

It says it's rates power cunsumption is 300mA's.
How long will it run on 80% of let's say a 1000mAh LiPo?

I am leaning towards one of these:
http://www.advantagehobby.com/product.php?productid=51256&cat=343&page=1


I'd like to make sure I have enough juice.
I'm planning on using it for more than RC stuff. So if I can get a formula, I can know what I'm looking at for time.

Thanks!
It depends on what else you have connected to the battery with that transmitter. Obviously, you'll have a camera in there somewhere... and maybe a triggering device... or camera directional/aiming controls???

The transmitter alone should run for 2 to 2.5 hours on a 1000mAh LiPo battery.

The simple estimate formula is 80% capacity of battery divided by consumption. i.e. (1000mAh x .80)/300mAh = 2.66 hrs.

Using the EVO LiPo: (2170 x .8)/300 = ~ 5 hrs 45 minutes.

You need to determine the total current draw of all devices connected to the battery, figure in any extra resistance of the wires, connections, etc., allow a safety buffer of at least a few percent, and go from there. After using it a few times, and monitoring how much charge was required compared to how long it was being used will help you dial in exactly how long you can safely run it.

You will also need to monitor voltage levels of the battery during use. When it starts to drop below 10.8 - 11 volts, you will beginning to have transmitter malfunctions. Try to match your camera voltage input requirements to the transmitter requirements, or you'll need to add a voltage regulator to the equation.

[mymax]

Thanks for the reply...
I will be powering the camera with it's own power (battery), so the only device on this pack would be the transmitter.
But, my camera does run on 7.4volts and if I had a large enough servo pack, I would combine those two. The only issue their would be making a connection for a remote battery and not using the cameras original battery.

The camera is a Sony CX7 HD.

Thanks!

[r40734]

Thanks for the reply...
I will be powering the camera with it's own power (battery), so the only device on this pack would be the transmitter.
But, my camera does run on 7.4volts and if I had a large enough servo pack, I would combine those two. The only issue their would be making a connection for a remote battery and not using the cameras original battery.

The camera is a Sony CX7 HD.

Thanks!
Sorry, not familiar with that camera. I assume you have a power input jack somewhere on the camera to be able to run it from a transformer plugged into the wall outlet??? If so, you can just use the proper size jack (probably find at Radio Shack) and connect the wires to a servo pack. I would use a voltage regulator off of the LiPo for your transformer in that case. Or you can use another LiPo dedicated to the camera, depending on your weight requirements. A 2S1P LiPo would be about right.

Good luck and be sure to post some photos of your setup and video when you get it all together!

[mymax]

Here's the camera (Video HD)
http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921665089063

All I will do is send the video to the video Tx, so the battery (11.1v) will power the AV Tx only.
I just wanted to know how long I could run that Rx.
Thanks

[mymax]

I ended up getting a 3S FP 1800mAh pack and (2) 2S 1800mAh packs for my onboard power of servos and gyro.