Can I charge with different voltage?
The voltage output is critical and must match your new charger. For example if you are using a charger with 20V output, look for a replacement device with matching voltage. By using different voltages, you risk shortening the lifespan of your batteries and your device.
Can I use A power adapter with higher voltage?
Voltage too high – If the adapter has a higher voltage, but the current is the same, then the device will likely shut itself off when it detects an overvoltage. The device could power on and draw more current from the adapter than it’s designed for. This could cause the adapter to overheat or fail.
How are voltages converted in a power adapter?
Power adapters convert the electricity from one voltage to another voltage, and sometimes between AC and DC. The quick answer to your question is to multiply the INPUT voltage by the INPUT current. In this case, you likely have 120 V input (if you’re in the United States).
How does the input power of an AC adapter work?
This means you can’t make the assumption that input power into the device is Vac x Iac. The device has (more than likely) a bridge rectifier and smoothing capacitor and the current drawn will almost be like a spike of a few milliseconds every 10ms (50Hz supply).
How much power does a power adapter use?
In your example, the power adapter is rated to use a maximum of 58 W (0.24*240), but can output only 5*1.5=7.5 W. So, worse case based on the label, it will use 58 W, but only supply 7.5 W to your device, so about 13% efficient.
Is it okay to use a power supply that provides slightly more voltage?
This doesn’t mean your device will consume 3.42 A when its powered with this adapter; it is only an indication of the maximum current that can be drawn through the adapter by any device that it is connected to, above which the adapter gets damaged. Any device will only draw as much current as it needs, so long as its power source can supply it.