Ok, I wish people would stop saying that you can't use different manufacturers micro USB chargers for other phones. I hope that this will put this to rest.
All mobile phone chargers are made to USB specs. If they are not made to specs, you can't use the USB connector and/or the USB logo. There are some conditions where they will allow the use of a USB connector on a device that requires more power than what the USB can deliver BUT an additional power supply must be used in conjunction (non USB connector) with the USB wire OR a dual head USB cable so that the device that requires more current can draw the additional current from a second USB port. NO manufacturer can make a USB charger or port that can exceed the MAX voltage and/or MAX current of the USB spec. What does this mean? It means that depending on what charger you use, it will charge your phone a little slower if it's a lower current one then the original manufacturer of the device.
If the phone is rated for 1000 mah and the charger is putting out 1300 mah, then phone will only draw what it needs, it will not take the full 1300 mah. It's more of the voltage you need to keep an eye out for.
This is from:
Universal Serial Bus - Wikipedia, the free encyclopedia
Power
In Battery Charging Specification, new powering modes are added to the USB specification. A host or hub Charging Downstream Port can supply a maximum of 1.5 A when communicating at low-bandwidth or full-bandwidth, a maximum of 900 mA when communicating at high-bandwidth, and as much current as the connector will safely handle when no communication is taking place; USB 2.0 standard-A connectors are rated at 1500 mA by default. A Dedicated Charging Port can supply a maximum of 1.8 A of current at 5.25 V. A portable device can draw up to 1.8 A from a Dedicated Charging Port. The Dedicated Charging Port shorts the D+ and D- pins with a resistance of at most 200 Ω. The short disables data transfer, but allows devices to detect the Dedicated Charging Port and allows very simple, high current chargers to be manufactured. The increased current (faster, 9 W charging) will occur once both the host/hub and devices support the new charging specification.
Mobile device charger standards
As of June 14, 2007, all new mobile phones applying for a license in China are required to use the USB port as a power port. This was the first standard to use the convention of shorting D+ and D-.
In September 2007, the Open Mobile Terminal Platform group?a forum of mobile network operators and manufacturers such as Nokia, Samsung, Motorola, Sony Ericsson and LG?announced that its members had agreed on micro-USB as the future common connector for mobile devices.
On February 17, 2009, the GSM Association (GSMA) announced that they had agreed on a standard charger for mobile phones. The standard connector to be adopted by 17 manufacturers including Nokia, Motorola and Samsung is to be the micro-USB connector (several media reports erroneously reported this as the mini-USB). The new chargers will be much more efficient than existing chargers. Having a standard charger for all phones means that manufacturers will no longer have to supply a charger with every new phone. The basis of the GSMA's Universal Charger Solution (UCS) is the technical recommendation from OMTP and the USB-IF battery charging standard.
On April 22, 2009, this was further endorsed by the CTIA ? The Wireless Association.
In June 2009, many of the world's largest mobile phone manufacturers signed a Memorandum of Understanding (MoU), agreeing to make most data-enabled mobile phones marketed in the European Union compatible with a common External Power Supply (EPS) based on the GSMA / OMTP Universal Charging Solution.
On October 22, 2009 the International Telecommunication Union (ITU) announced that it had embraced the Universal Charger Solution as its "energy-efficient one-charger-fits-all new mobile phone solution", and added: "Based on the Micro-USB interface, UCS chargers will also include a 4-star or higher efficiency rating?up to three times more energy-efficient than an unrated charger."