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I've also seen a few posts where people say its not suitable as its output is 12V. This didn't ring true with me - it will be one voltage or the other. I can't see anyone making a charger that could potentialy damage another piece of equipment using the same format of connector.
Anyway, I've just found this on a seperate forum....
Quote:
All USB chargers use the same voltage (5 volts). If it is a USB charger, it's safe to try. A charger is a USB charger if it has a USB connector (either mini USB connector or a full size USB connector)
Amperage (current) is a different story (100mA vs 500mA), but they all err on the 100ma side unless automatically negotiated to output 500mA. Some USB chargers are intelligent (auto-negotiation circuitry) and some USB chargers are 'dumb' (just a 5V adaptor that happens to have a USB connector. Even for the unregulated USB chargers, due to Ohm's law, the fixed voltage limits the current to the charging capacity of the device.
The 'dumb' USB chargers will simply charge a BlackBerry 7280 very slowly, since the 7280 seems to prefer to auto-negotiate before it wants to accept the full current (500ma instead of 100ma). At least, that has been my experience with using an off-brand charger with my 7280.
The bottom line is that it's safe to interchange USB chargers with different devices -- but be prepared for slow charging on certain devices that like to err on the safe side. (This does not always happen)
I've also seen a few posts where people say its not suitable as its output is 12V. This didn't ring true with me - it will be one voltage or the other. I can't see anyone making a charger that could potentialy damage another piece of equipment using the same format of connector.
Anyway, I've just found this on a seperate forum....
Quote:
All USB chargers use the same voltage (5 volts). If it is a USB charger, it's safe to try. A charger is a USB charger if it has a USB connector (either mini USB connector or a full size USB connector)
Amperage (current) is a different story (100mA vs 500mA), but they all err on the 100ma side unless automatically negotiated to output 500mA. Some USB chargers are intelligent (auto-negotiation circuitry) and some USB chargers are 'dumb' (just a 5V adaptor that happens to have a USB connector. Even for the unregulated USB chargers, due to Ohm's law, the fixed voltage limits the current to the charging capacity of the device.
The 'dumb' USB chargers will simply charge a BlackBerry 7280 very slowly, since the 7280 seems to prefer to auto-negotiate before it wants to accept the full current (500ma instead of 100ma). At least, that has been my experience with using an off-brand charger with my 7280.
The bottom line is that it's safe to interchange USB chargers with different devices -- but be prepared for slow charging on certain devices that like to err on the safe side. (This does not always happen)
So - does anyone actually
Quote:
know
if the charger from MobileFun is safe to use?
I guess it'd be nice to think USB (even mini) is USB, is USB - but you only need one vendor of a device to use the interface, but not as spec, and market the chargers for their device to upset the apple cart.
When you connect your i3 to a PC - it's a standard (albeit with ferrite core) USB to mini USB cable. I don't always use the i3 one, as I have numerous of these for different devices.
However, in a car, as we all know, it needs a step-down in the voltage, and given what I mentioned above, I do wonder how much it matters? Isn't the Garmin one available for a reasonable cost, on the web?
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