battery load testing
 

How do you do it? I have the Turnigy 130W meter, but what are you guys using for the load?

I have a prop that fits a brushed motor mounted to the bench. I dont think it pulls more than 20-30A, but its what I have so it works for light loads.

I have the turnigy wattmeter, great little device

I use it to check battery performance on my mini revo with different battery combinations

Great for showing the following

Amps Drawn
Voltage drop under load
Total Power

Just gets connected between batteries and esc

Showed me very noticeable difference between the cheap Zippy batteries and some more expensive ones rated at a higher discharge

Cheers

I guess I'm doing the same thing with my Eagle Tree onboard data recorder. I get voltage and current vs run time over a run. Its a real world type load and it tells me a lot about my setup - what the amp draw is, when its highest, when its lowest and what kind of average. I can see if lipo lives up to its C rating based on the voltage drop for a given amp demand.

I use this on nimh do not have lipos yet just got a orion race spec charger and am ordeing lipos soon the tekin goes to 30 amp gives run time in seconds and capacity
http://i297.photobucket.com/albums/m...f/IMG_0311.jpg

Ya I'm gonna order one of those...but does it have a downloadable memory or something? How do you get the data off it?

Also, my main need is to load test batteries to compare specs to reality, and to compare battery v. battery.

The data is reset each time the unit is turned on

Initially when plugged in it will show you the current battery voltage

Once you do a power / high speed run it will store the following

Max amps
Min Volts
Power
Mah used

Cheers

Thanks for that! can't wait to play with it...