You need the Plus. It can last two days on a charge, and will last a day even if you're doing battery burners like GPS. Now there's the best of both worlds: f

You need the Plus. It can last two days on a charge, and will last a day even if you're doing battery burners like GPS. Now there's the best of both worlds: for small, get the 6; for big and battery, get the Plus. Some folks like small and don't want their phone fattened.