Hi guys, My punto diesel is 1.7 years old. Today i came back from a trip, i found the battery to be flat. On checking with rdc service center, they say the gravity check shows only 7. And asking me to replace battery. They claim that the stock battery lasts mostly for 2 years for in frequent use. Can u guys comment on this, if this is true then what battery brand should i go for or this recommendation seems fishy.