Can I charge 3.7 V battery with a 4v charger?

3.7V is the nominal voltage of the cell. As long as the maximum voltage for the cell is 4.2V or higher and the charge current is equal to or less than the amount recommended in the datasheet (usually 0.8C or less is safe) then you can charge the cell with the charger.

Can I charge my 3.7 V battery with 5V charger?

Generally, a 3.7V lithium battery needs an overcharge and overdischarge protection circuit board. Lithium battery with protection circuit board can be charged with 5V voltage(4.8V to 5.2V can be used). For 3.7V lithium batteries, the charge cut-off voltage is 4.2V and the discharge cut-off voltage is 3.0V.

How many volts does it take to charge a 3.7 volt battery?

Generally, a 3.7V lithium battery needs to have a “protection circuit board” for overcharging and overdischarging. If the battery does not have a protection circuit board, it can only be charged with a voltage of about 4.2V, because the ideal full charge voltage of a lithium battery is 4.2V.

What is the charging voltage for a 7.4 V Li ion battery?

1 Answer. The answer to your question is: 8.4 volts.

Can I charge a 6V battery with a 3v charger?

No. As tomnexus has pointed out you need a voltage higher than that of the battery before it will charge properly.

Can I charge my controller with a 5V Charger?

Once the battery reaches 3.7V the controller needs to switch to a constant voltage supply to maintain the battery at full charge. A 5v charger for a 3.6v device is very likely, maybe even guaranteed to damage your device in a serious way.

How do you charge a cell phone battery with 5V?

Your cell phone battery is either charged within the phone itself, or in a special charger unit is replaceable (as the olb Blackberry for example could). 5V is the standard voltage for USB, so chances are if you are connecting to a supply that has USB connector either end, that will be the 5v you are talking about.

How much voltage does it take to fully recharge a battery?

A battery needs a higher voltage power source than the current battery voltage in order to recharge. To fully recharge a lithium ion cell, you need to eventually get to 4.2v. If the system only used 3.7v, it would never (fully) recharge.

How does a battery charger charge the battery?

Typically, the charger supplies a constant current at slightly higher than the battery’s voltage. As the battery voltage increases, the supplied voltage increases until it hits the maximum for the cell – typically 4.2V.