for pitch backup systems in wind turbines expected life: 10 years at 20 , 5 years at 25 (based on a weekly discharge cycle of max 15 seconds) dimensions ( mm ) s p ecification duration of discharge vs. discharge curren t characteristics lar g e current dischar g e characteristics ( 25 ) peak current(a for milliseconds) 160 150 140 130 120 112 105 94 86 80 75 discharge current(a) 144 135 126 117 108 101 95 85 78 72 68 discharge time(sec) 3 6 10 15 20 25 30 40 50 60 70 peak current(a for milliseconds) 70 66 62 59 55 52 49 46 44 42 40 discharge current(a) 63 60 56 53 50 47 44 42 40 38 36 discharge time(sec) 80 90 100 110 120 130 140 150 160 170 180 the cut off voltage should be more than 8.0v. battery should be charged after each discharge. char g in g method **please consult us for the right control voltage if the ambient temperature is different. o p eratin g tem p erature ran g e * for storage, please ensure that battery is fully charged. data in this sheet are for reference only and are not guaranteed values. -40 ~ 50 charge -20 ~ 50 discharge -20 ~ 50 *storage **control voltage: 13.6v~13.8v at 20 ~25 with temperature compensation, initial current: 1.08a or smaller contents indicated (including the recycle marking, etc) are subject to change without notice. battery case resin: flame-retardant (ul94v-0) 7.2ah 20 hour rate 7.2ah 151 mm total height width lc-wtp127r2 94 mm 100 mm length approx. mass terminal nominal voltage 12v rated capacity(20hr) 2.50 kg dimensions height 64.5 mm 85% 0 100% 25 10 hour rate after 12 months after 6 months 82% 91% self discharge (25 ) 64% after 3 months 65% -15 capacity (25 ) temperature dependency of capacity (20 hour rate) 40 21 m ? internal resistance 102% 1 hour rate 250m 4.9ah fully charged battery (25 ) 6.5ah 3 hour rate 5.8ah 0.1 0.3 1 31030 100 1 3 5 10 30 60 3 5 10 20 30 (minute) (hour) 40 25 0 -15 duration of discharge discharge current(a) terminal t yp e 6.35 4.5 1/1 2009.06
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