Common questions

Can I use a 5V adapter to power a 3.7 V device?

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Can I use a 5V adapter to power a 3.7 V device?

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.

Can you charge a 7.4 V battery with a 5V charger?

Regardless of the nominal power of the 5V power source, the module can safely and efficiently charge the lithium battery. The actual charging current and efficiency depends on load capacity of the power supply and the power loss of the cable.

Can you charge a phone with 3.7 V?

As we know, in most cases, a 5V charger can be used for USB of computers and mobile phones. The charging cut-off voltage of the 3.7V battery is 4.2V and the discharge cut-off voltage is 3.0V. Therefore, when the open-circuit voltage of the battery is lower than 3.6V, it should be able to charge.

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Can I charge a 3.7 V battery with a 4.2 V charger?

You must never charge any 3.7V lithium ion battery using a fixed voltage 4.2V charger. Although this voltage is appropriate for the last part of the charge, if applied when the existing charge percentage is low then it is very likely to create excess current.

Can I use 5V adapter for 3V?

There is not such thing (or there should be no such thing) as a 3V USB anything… USB is 5V, and always will be. It is a standard that all devices must comply with. This means that you should not be able to find an AC adaptor to 3V with USB, If you do find it, don’t buy it.

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 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.

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Can I charge a 6v battery with a 5v charger?

To charge a 6 V lead acid battery requires 6.9 to 7.1 V. 5 V will just not work.

Can I charge a lithium battery with a normal charger?

You can use a lead-acid charger to charge lithium batteries as long as you can set the maximum voltage of the charger and as long as the charger does not have an automatic equalisation mode enabled.