Are sure that isn't a euphamism for "if you unplug at 9am you can probably make it until 5pm before it powers off due to dead battery"? Unless you're seeing som

Are sure that isn't a euphamism for "if you unplug at 9am you can probably make it until 5pm before it powers off due to dead battery"? Unless you're seeing something I"m not there's nothing really there that tells us anything solid about the actual battery life.