9.6.2.10 Requirements: number of cy

9.6.2.10 Requirements: number of cycles, see Clause 10 9.6.3 Cycling test 2 9.6.3.1 The test shall be carried out on batteries that have been charged in accordance with 8.2.2. (vented batteries) or 8.2.4 (VRLA batteries). 9.6.3.2 Throughout the whole test period, with the exception of the rapid discharge test at the temperature of -18 °C ± 1 °C, the battery shall be placed in a water bath at a temperature of 25° C ± 2 °C. The terminal base of the battery shall be at least 15 mm but not more than 25 mm above the level of the water. If several batteries are in the same water bath then the distance between them and also the distance to the walls of the bath shall be at least 25 mm. 9.6.3.3 Purified water shall be added to the battery as necessary during the test to maintain the electrolyte level in accordance with the manufacturer’s recommendations except for “low water loss”, “very low water loss” and VRLA batteries. 9.6.3.4 The batteries shall be connected to a device where they undergo a series of 18 cycles, each cycle comprising: a) a discharge for 2 h at a current, in amperes, of I = 5 In, b) immediately followed: – by a recharge for 4 h and 45 min at a voltage depending on the battery technology with its related water loss level (see Table 2) with a maximum current in amperes being limited to Imax = 5 In (see 7.1.2), and – for 15 min at a constant current in amperes of I = 2,5 In. (N,L,VL), – for 15 min at a constant current in amperes of I = 0,5 In (VRLA). 9.6.3.5 The battery, maintained at 25 °C ± 2 °C, shall be charged in accordance with 8.2.2 (vented batteries) or 8.2.4 (VRLA) but with the times at constant voltage charge being limited to 6 h. 9.6.3.6 The battery shall be stored on open circuit, still at 25 °C ± 2 °C, for 5 h.