7.10.2.1.6 SOC determination Due to ageing during the cycling test, a capacity loss is expected. Therefore, it is very important to provide a clear procedure to determine SOC over the whole test period. The rated capacity, determined in 5.1 specifies the range between 100 % SOC (fully charged) and 0 % SOC (fully discharged). For adjustment of the SOC values, the 100 % value shall be taken as the basis. 7.10.2.1.7 End of test criteria The cycle life test shall be terminated according to any of the following end-of-test criteria: — the cycle life test profile cannot be performed any longer, for instance because limits are reached; — the requirements of the parameter check between the life cycle test profile sequences according to Table 28 step 9 can no longer be fulfilled;— by agreement between the supplier and customer. 7.10.2.1.8 Capacity fade The change of dischargeable capacity from the BOL value (measured according to energy and capacity test at RT; see 7.1) to some later point in time shall be reported periodically as capacity fade. The capacity fade, Cfade, shall be expressed as a percentage of the initial BOL capacity (1 C at RT) as shown in following Equation: