Output current to charge mobile phone

My phone's original charger is rated with output of DC 5.0V, 850mA,
I have a spare charger which output is DC 5.0V, but 1200mA,
can I use it to charge my phone?
Will it cause damage to the battery?

 

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Somebody fedback to me:

 

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If both are USB chargers then you can use either one to charge your phone.

 

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The vast majority of mobile phone chargers aren't actually chargers at all, they are merely power supplies. The charging circuitry itself is inside your phone. If this wasn't the case, you wouldn't be able to charge your phone using one of the USB ports on your computer and a simple USB adapter (USB to Micro-USB for example). In that scenario, your computer is simply acting as a power source.

Being that both of your power adapters are DC 5.0v, I guess it's pretty safe to say that we're dealing with the USB standard, and if your phone uses a Micro-USB port, then it's pretty much certain. The new 'charger' (power supply) is simply capable of delivering more current than the old one, but it will be the charging circuitry inside the phone that determines how much of that current it pumps into your battery.

If you want to be absolutely certain, tell us the model of your phone.

 

I am using Sony Xperia S, new phone

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Yes, it is micro USB.

 

It will not harm the battery to charge it from the higher current power supply. The battery will only draw the current it needs, and the power supply will only deliver what the battery draws. So no harm is done.