How long would 2200mah portable battery last on iPhone 4?
Hey I'm looking to buy a iPhone 4 portable battery charger as I'm out for long hours and my phone always runs out of battery I'm looking at the 2200mah but I don't know how much battery life that would give me?
Well based on the standby time alone with the 4's current 1420mAh standby time of 300hrs, a 2200mAh would last ~464hrs
Yhyyhhh
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