Can a 5V charger charge a 7.4 V battery
No. USB is 5V; not high enough for charging a 7.4V lithium battery. That's a 2S battery which should be charged with a dedicated 2S balanced charger for safety. Such a charger will need a supply of at least 8.4V, typically 9V, able to handle the required charging current.
What voltage should I charge a 7.4 V battery
In our case we have a 7.4V Lithium battery pack, which is nothing but two 18650 cells of 3.7V each is connected in series (3.7V + 3.7V = 7.4V). This battery pack should be charged when the voltage reaches down to 6.4V (3.2V per cell) and can be charged upto 8.4V (4.2V per cell).
Can you charge a 7V battery with a 5V charger
No, it is not advisable. The 5V 2A device does not sound like a charger, it sounds like a power supply, so it should not be connected to batteries anyway to prevent damage and fire.
Is it OK to use 5V charger to a 3.7 V battery
Generally, a 3.7v lithium battery needs a "protection board" for over-charging&discharging. The battery without a protection board can only be charged with 4.2V voltage, because the ideal full charge voltage of a lithium battery is 4.2v, once the voltage exceeds 4.2v, the battery may be damaged.
How do you charge a 7.4 V battery
With just a mobile phone AC adapter (or power bank) and an Android data cable, you can safely and efficiently charge the 7.4V lithium battery up to 1A, which commonly used in various robots and motor drivers. The light-weight and micro USB interface features make it ideal for outdoor applications.
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.
How do you charge a 7.4 volt battery
Connect the mobile phone AC adapter or the power bank to the USB IN port via a USB cable. The CHG charge indicator (red) flashes rapidly indicating no battery being inserted. Connect a 7.4V lithium battery to the BAT IN port. CHG is always on indicating the battery being charging.
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.
Can I charge a 3.7 V battery with a 4.2 V charger
The charge cut-off voltage of a 3.7V battery is exactly 4.2 V. Therefore, it is possible to use a 4.2V charger as a 3.7V battery charger, but using a 5V charger to charge a 3.7V battery will cause the battery to overcharge.
Can we charge 3.7 V battery with a 4.8 V charger
Lithium ion are often quoted as 3.6 or 3.7v “nominal” or average. Either way, the 4.8v charger is unsuitable. It might overheat, or eventually overcharge the battery, which will cause it to overheat, and possibly worse.
Can I charge 7.4 V battery with 12V charger
A 12V input into a 7.4V lipo/li-ion can make it catch fire. As stated above, you must use a charger that is specifically designed for Li-Ion usage. Your Li-Ion pack will charge to 4.2 volts per cell (same as lipoly) via CC/CV algorithm. Under no circumstances should your pack be charged above 8.4 volts.
What happens if you charge a 6V battery with a 5V charger
Secondly, a lower voltage charger will never be able to produce enough power to fully charge your 6V battery. It might charge your battery enough for you to get your device jump started, but that's about it.
Can I use a 5V charger to charge a 6V battery
“Can I charge a 6-volt battery using a phone charger USB having an output 5V 2A” No. Because, to charge a battery, the source voltage must be higher than the rated voltage of the battery. For example, you can notice that the phone charger is rated 5V, while the battery is rated at 3.7V.
Can I charge 4.2 V battery with 5V
Yes you can, but the concern is what happens when the voltage exceeds 4.2 volts. In the case of lread acid or NiMH types nothing except a slight outgassing or mild heating, in the case of a li ion ,it could result in a fire. . This type of battery cannot handle extremes and needs to be electronically protected.
Can I use 5V charger for 4.5 V device
There is no problem while using a 5v adapter to generate a 4.5v device. A device stating 4.5v actually can generally withstand a voltage appliance of a minimum of 5.5v. Hence there is no problem applying a 5v adapter to that specific device.
Can I use 5V charger to charge 12V battery
No way it'll do 12V or any other chemistry. To charge any battery, you need to give it a voltage higher than what it's going to charge to.
Will 5V work with 6V
Most of the times it won't. Cannot tell for sure without checking the internal hardware of the repeater. But if it works without generating heat it will be fine as far as I know. The 5V adapter might generate more heat than the 6V as sometimes the lower voltage will increase the current draw.
Can I charge 6V with 5V
“Can I charge a 6-volt battery using a phone charger USB having an output 5V 2A” No. Because, to charge a battery, the source voltage must be higher than the rated voltage of the battery. For example, you can notice that the phone charger is rated 5V, while the battery is rated at 3.7V.
Will 4.5 V work with 5V
There is no problem while using a 5v adapter to generate a 4.5v device. A device stating 4.5v actually can generally withstand a voltage appliance of a minimum of 5.5v. Hence there is no problem applying a 5v adapter to that specific device.
Can we charge 4 volt battery with 5 volt charger
No, charging at that V is too low.
Can I use a 7.5 v adapter for a 5V device
1 Answer. 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 charging 3.6 V battery with 5V
A 5v charger for a 3.6v device is very likely, maybe even guaranteed to damage your device in a serious way. You should use the charger that came with it or find an identical one. Remember that along with the output voltage rating there is also maximum output amperage, so not every 3.6v charger will work.
What happens if I use a 5V adapter on a 12V device
That said, I'd suggest against using a 5 volt supply for a 12 volt device. For a start, if it really requires 2 volts (or close to it), you will have a problem because 12 x 2 = 24 watts, while 5 x 2 = 10 watts, so the power supply is under-specced to do the job at maximum load.
What happens if you put 12V on 5V
You cannot use a 12V power supply on a 5V. It will cause the device to draw more current than it is designed for and will likely burn out, causing fire hazards and explosions. In other words, if the applied voltage is more than the maximum rated voltage then the device will undoubtedly fail due to overvoltage.
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.
