Originally Posted by Ticko311
Are other mini usb chargers like the Motorola mini usb for the razr and others damaging to the battery? I heard that they have a lower voltage and I would just like to hear the truth to this
OK, here's more info then you may want to know. First of all, no USB charger should damage your BlackBerry unless the charger is defective. Any device can develop a defect, and mini USB battery chargers are no exception. That's true whether its the OEM BlackBerry charger or any other one.
USB stands for Universal Serial Bus and is an industry standard with published specifications. In particular, the voltage supplied is specified as 5 volts, +- .25 volts - ie, the voltage must be from 4.75 to 5.25 volts. In addition to voltage, the USB specification defines how much current the device must supply, and gives two options - hi power and lo power. Hi power capable means it must supply 500mA of current, and that's what the BlackBerry (and most, but not necessarily all other) chargers supply. Its also possible to meet the USB specification and only supply 100ma, which is the lo power spec. If a charger meets the lo power but not the hi power spec, it will supply 100mA or more of current, but less than 500ma. This would result in slower charging as reported by some, but would not damage your BlackBerry.
Reports of a charger damaging a BlackBerry or its battery (or resulting in other problems such as the reported reset issue above) are a result of an individual charger having a defect, not a basic compatibility issue of any kind. Any USB charger that's not defective will charge your BlackBerry, but some will charge it slower than others. USB As a Power Source