Originally Posted by davepull
the biggest problem with c rating is there is no "industry standard" for testing. the manufactors can do whatever they want so company xyz says there 5000 pack is a 28c doesn't mean it is the same 5000 28c from company abc.
the differences it the c rating testing is so wide on companies 28c is anothers 23c etc... IMO c ratings are usless.
I think C ratings are somewhat overrated and not compareable between companies.
I think a new approach should be used to rate batteries.
I would like to suggest PEAK WATTAGE for battery ratings!
Just like Lead Acid Batteries have CCA rating for the maximum amps produced without the battery voltage going under 7.2V for a 12V PB battery
Peak Wattage would be the maximum wattage produced by a LiPO without going below 3.0V per cell or some other voltage cut-off. The test could be a simple test where the starting current is 1C and increases 1C every second untill the voltage cuttoff is reached or a reduction in wattage. The ramp-up in amperage at a constant rate would eliminate errors caused packs that are only good for the a short burst of amperage vs. the actuall race conditions.
The reason I would rather see peak wattage because the voltage drop on batteries can skew the results. At somepoint the voltage drop is more rapid than the increased amperage reducing the total wattage. It would be a simple standard for everyone to adapt and racers could compare batteries more easily