Can I use a 5v adapter for 6V
No, a 5v adapter is never recommended to power a 6v device. Because we need a voltage higher than that of the battery before it will charge properly. As a device is required to run from the voltage rating it is given, hence if we use a 5v adapter for a 6v rated device, the device won't start at all.
Can I use 5v for 4.5 V
I've run many 4.5v devices off a 5v USB power supply without problem. Most devices can tolerate it fine, because a brand new AA battery can deliver in excess of 1.6 volts, so the device is designed with some leeway.
Can I use a 12V power supply on a 6V device
It depends on what the device is. If the device has its own internal switching regulator, the voltage probably won't be a problem, but since the 12V power supply has a lower maximum power (12V * 0.35A = 4.2W, and 6V * 1A = 6W), it may draw too much power and the power supply will be damaged.
Can I use a 9v power supply on a 7.5 V
However if the device is relying on the regulated voltage from the adaptor and has no internal circuit to control or limit overvoltage, then that 9v adapter may damage your device. That said, there are 7.5v devices designed with tolerances wide enough that the 9v you provide it won't make any difference at all.
Can I use a 7.5 V charger on a 6V battery
If your device only takes 6-6.5V then using a 7.5V supply could well destroy the circuitry in the device and make it unusable.
Can I use a 7.5 V adapter for 5V
You should never use a significantly higher voltage rating adaptor on any kind of electrical device. If you do so you are risking damaging the equipment and anything else that you might have plugged into it.
Can I use 5V 0.5 A for 5V 1A
Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.
Will a 12 volt charger damage a 6 volt battery
This will run your battery dry and create a thermal runaway scenario, which is very dangerous. Again, some people use a 12V charger to get their 6V battery jump started, but it is never advisable to use a 12V charger to try to fully charge your 6V battery.
Can I use a 9V power supply on a 6V
If you can be sure that the original PSU was unregulated, then yes a 6V or 9V adaptor will work (as long as the polarity is right and the PSU is powerful enough – mA high enough).
Can I use a 7.5 v adapter for 5V
You should never use a significantly higher voltage rating adaptor on any kind of electrical device. If you do so you are risking damaging the equipment and anything else that you might have plugged into it.
Can I use a 9V for a 5V
1 Answer. In general the effect depends on the device and power supply. In general, connecting a 9V supply to 5V device could damage it immediately, or in long term, but it is impossible to say without seeing the schematics of the device how much excess voltage it can handle.
Can I use a 6V adapter for 7.5 V
The short version: Voltage (V) should always be the same for both adapter and device. Polarity (plus on the left side or plus on the right side) should always be the same for both adapter and device. Current (A or mA) of the adapter should not be lower than the current of the device but may be higher.
Can I charge a 6V battery with a 7V charger
Nominal voltage is one specified for a battery, eg 6V in your case. In your case 6V could be, usually is, for Lead Acid battery. Such Lead Acid battery has 3 cells each having nominal voltage of 2V while max charging voltage is 2.3 – 2.5V depending how fast charging is. So, in your case you could use 7.2V for charging.
Can I use a 7.5 V charger on a 6v battery
If your device only takes 6-6.5V then using a 7.5V supply could well destroy the circuitry in the device and make it unusable.
Is it OK to use lower voltage adapter
Choosing an adapter with a higher or lower voltage or current rating may cause the connected device to malfunction. This happens if the adapter's VDC is lower than the device's input voltage even when their current ratings are the same.
Can I use a 5.2 V 2A charger in place of 5V 1A charger
Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.
Can I charge a 6V battery with a 7v charger
Nominal voltage is one specified for a battery, eg 6V in your case. In your case 6V could be, usually is, for Lead Acid battery. Such Lead Acid battery has 3 cells each having nominal voltage of 2V while max charging voltage is 2.3 – 2.5V depending how fast charging is. So, in your case you could use 7.2V for charging.
Can I charge 6V battery with 5V charger
It depends on the specific battery and charger in question. If the 5V charger is specifically designed for use with a 6V battery, then it should work just fine. However, if the charger is not specifically designed for use with a 6V battery, then it's possible that it could damage the battery or cause other problems.
Can I use 12V charger for 6V battery
This will run your battery dry and create a thermal runaway scenario, which is very dangerous. Again, some people use a 12V charger to get their 6V battery jump started, but it is never advisable to use a 12V charger to try to fully charge your 6V battery.
Is it safe to charge a 6V battery with a 9V charger
You can charge 6 V battery from 9 V charger, but you will need the following in designing the charger circuit: Limit the charging current within the acceptable limits for battery. Limit and cut off the charging voltage when necessary once the battery is fully charged.
Can I use a 9V power supply on a 6V device
If you can be sure that the original PSU was unregulated, then yes a 6V or 9V adaptor will work (as long as the polarity is right and the PSU is powerful enough – mA high enough).
Can I use 12V adapter for 6V
This will run your battery dry and create a thermal runaway scenario, which is very dangerous. Again, some people use a 12V charger to get their 6V battery jump started, but it is never advisable to use a 12V charger to try to fully charge your 6V battery.
Can I charge 6V battery with 7v charger
Nominal voltage is one specified for a battery, eg 6V in your case. In your case 6V could be, usually is, for Lead Acid battery. Such Lead Acid battery has 3 cells each having nominal voltage of 2V while max charging voltage is 2.3 – 2.5V depending how fast charging is. So, in your case you could use 7.2V for charging.
Can you charge a 6V battery with a 7.5 V charger
If the charger is designed for that variety of battery, then yes you may. It should take about 4Ah divided by 2A charge current times an efficiency penalty plus a substantial period of trickle charge if you intend to fully charge it. Wow!
Can I charge a 7.4 V battery with a 6V charger
Not without a voltage booster circuit. 7.4v sounds like two 3.7v Lithium ion cells in series, and 3v per cell is more or less flat. You'd need 8.4v to fully charge them – plus charge management electronics to make it safe.
