To all of the ones asking about the 20C rating of the Checkpoint.
1. Originally Tower and everywhere else, including here, advertised it as a 20C battery. That was changed to reflect the true 16C rating that it is.
2. Your correct, for 90+ percent of the users it is still a great battery for the money and has absolutely nothing wrong with it. Use it and be happy.
3. Trakpower has come up with an agreeable resolution for the remaining 10% that will notice the difference.
I think Julian from Trakpower probably summed it up the best in his post. For the hardcore racers their 4900 25C is the battery of choice from their company. The Checkpoint is still a very good battery for everyone else.