I had purchased a SAMSUNG GALAXY PRO 7510 from m/s JAI MAA SHARDEY ENTERPRISES ,VARANASI vide invoice no. 429 dated 01.06.2011. Since the first day, the battery would discharge fully in around 10 hrs..I sent the set to the authorized service centre .They reloaded the software but the problem remained .They said that this is the normal standby .We are not expecting this standard of quality from SAMSUNG .