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hi i am having iphone 6 with battery draining problem. i tried with replacement of tristar still having same problem. it is consuming 250 MAmp in standby mode. i checked each and every cap around tristar and tigris, found no short. what to do to fix it? can any one please help it out.

Have you tried replacing battery and restoring software? Also is the phone getting any abnormal heatup e.g top of screen or right below rear camera?