The cells we use are not capable of delivery hunderds of full 100% cycles. Cells such as Sanyo 1900SCR (RC2000) and 2400SCR (RC2400) are capable of this performance, but cells pushed to high capacity such as GP4300, IB4200 etc cannot cycle 500 times. It might say it in the data sheet but 100% cycles cannot be obtained. The IEC standard for cycle life is not actually a full charge and discharge and so helps ther manufacturer obtain a higher cycle count number.
Links capable of 30A+ are available, they are the links used on professional powertool batteries (Makita, Bosch Blue, Dewalt etc). These guys are as concerned as we are about making every tenth of volt available at the battery terminals and so have developed materials and processes which are suitable for these high rate applications. You can also weld copper braid to the cells but this is difficult, requires very very high current and a water cooled welder.. we used to do it at our factory in Mexico but it was a pain to make repeatable.
on a seperate note... I hear from my contacts in China that there is a new version of the IB4200 coming out this month which is meant to have better life. Also, GP4300 is available again. If anyone is interested, please drop me a PM. Will people go back to the GP cell if they are obtainable?
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