Hi Everyone
Regarding the Tab7 battery thing, if you can used your tab for 4-6 hours depending on your usage then i can say that it is good. Battery indicator as we know is a very varied subject and mostly android phones also have this, sad but its true that you cannot totally depend on the percentage level of the battery as it will vary accordingly to your everyday usage. Also please make sure that there is no overclocking of processor which also caused the battery to drain fast.
Now for the unused Tab which according to some the battery draining is fast, you might want to give us chance to check your unit. Please note that for this type of issue, we will require you to leave the tab to us for 2-3 days and we will monitor and do our own testing. Do note that you have to backup all the apps that you have and delete all the accounts like email for your security.
Sorry for any inconvenience.