not to much only when needed if you over charge battery will only get worse over time..
once per day
Charge it when you see it has 1 bar.
1hour
Replace it when it will no longer take or hold a charge.
It depends on if you have any problem with the phone, like battery problem, not working to charge etc. Then you should restore the iphone. If you don't have any issues like these then it's enough to restore your iPhone at least once a year.
No but often the device will simply not work with your iPhone, it won't break it but it just won't be supported plain and simple
From any appropriate electrical socket.
To optimize battery life, only charge it when it is low.
No you only need to charge modern mobiles until they are fully charged.
Yes, you can charge your iPhone when it has a good amount of battery. However, you should avoid charging the phone until it is low in battery, to prolong the battery life.
Yes You can charge a DS With your iPhone, you just need to jailbreak your DS.
Your iphone should have a warranty on it including the charger. So go to an apple store and use the warranty to replace it.
The iHome will charge and play the iPhone. Your iPhone must be in airplane mode to avoid interference when the iPhone communicates with cell towers.
It should charge as long as it is supported. If not supported then nothing will happen
yes, you can