The iPad 2 has an astounding battery that can last up to a month in standby mode. That's all while maintaining the sub-processes that happen when the iPad 2 is sleeping such as pulling in push notifications and powering the hardware to make that possible. A one-month standby battery was also introduced in the new MacBook Air because it was a great feature. Just when we thought that battery life was getting good, industries surprise us with numbers that double the battery capacity of the current iPad 2 with the next iPad.