The Maxx and the Ultra got me thinking: How big of a battery is big enough? The Maxx claims 48 hours talk time and the Ultra claims 28 hours. I'm wondering, isn't 28 hours of talk (13 days of standby) enough? Most of us just need the phone to make it through one day of HEAVY use with juice to spare. At night we crawl into bed and plop our phones on their chargers. When we awake in the morning we are rested and ready, and our phones, likewise, are energized and ready. I'm sure there are individuals that NEED a big honking battery... maybe hardcore backpackers or other travelers with no access to outlets for weeks at a time. But, in general, for the masses, shouldn't 28 hours be perfect? To clarify the turmoil of my inner debate: I know there are more differences between the Maxx and the Ultra, and this isn't necessarily a question of Maxx vs Ultra. This is more of general question about how much battery is enough when shopping for phones.