Although we know that theSamsung Galaxy S2 will come with a higher capacity battery, there has been no mention of how long the battery will last between charges. However, we can go ahead and make some assumptions here.
Bearing in mind that the bigger battery in the Samsung Galaxy S2 will have to support the dual-core processor and other performance enhancements, the gain in battery life might not be that substantial. However, we know that a huge factor in power drain is the display screen of a smartphone and for this, we understand that the Super AMOLED Plus display of the S2 is highly power-efficient, thus balancing out the equation.
All the same, it is unheard of that a battery for a high end smartphone can last an average user longer than a day and we anticipate that the battery life of Samsung Galaxy S2 will be similar to that of the iPhone.