So does high C rating matter if I dont care about speed and only want run time? In a word yes, let me explain In regards to C ratings our cells have been tested and are capable of sustaining voltage under load at these rates. After saying that the long term life of a pack at those rates could be as low as a single use depending on the cell, conditions, and length of time it is run. And these are the cells themselves. Other components of a pack like the plug and wire can limit the capable discharge of a pack and will produce significant resistance. In reality no one pulls the amp draw the cells are capable of. That would lead to a 2 second discharge. Not a whole lot of fun in that time period. Most systems probably pull between 3-8 C on average. This can vary fairly drastically by setup and battery pack but this is between a 10-20 minute continuous runtime. What a higher C rated pack does for you in this case is provide you with more usable milliamps from a pack. A 30C 6000mah pack may only hold 3.75v per cell under load where as a 6500mah 150C Pack may hold a 3.95v per cell under load in the same situation. This equates to more power and will allow for more milliamps to be used before it hits cut off voltage. Beyond that with a higher C rated pack you are taxing it less in that setup which means you will get much more cycle life in this case than you would from a pack that is being pushed harder.
Posted on: Sat, 27 Sep 2014 18:38:55 +0000
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