[Baofeng] UV-5R: Charge and Use at Same Time?

[David Tanks]

DON'T CHARGE YOUR BAOFENG HT AND USE IT AT THE SAME TIME!

Read this to understand why.

David AD4TJ

----- Forwarded Message -----

From: Bill Storey via groups.io <wtstorey=aol...@groups.io>

To: "bao...@groups.io" <bao...@groups.io>

Sent: Sunday, October 10, 2021, 05:20:02 PM EDT

Subject: Re: [Baofeng] UV-5R: Charge and Use at Same Time?

The other piece of this puzzle is that LiION batteries require a very specific charging cycle.  Trickle charging after they are full may result in metallic Lithium, which becomes an explosion hazard.  If you run the radio while it is charging, the charging circuit is unable to observe the condition of just the battery.  Essentially the radio drain makes the battery look under charged, which will cause the charger to overcharge the battery, risking the hazard listed above.

A Lion charger will start charging at a defined current, then when the battery voltage reaches a certain level, it will charge in pulse cycles, adding charge, then observing the voltage.  When the voltage reaches the correct level, it stops charging altogether.

As pointed out by others, using the battery while charging it can be a life safety issue, due to a hazardous battery condition, if not due to inadequate charge.

Bill

Sent from my shoe phone’s big brother.  Please excuse auto connections caused by typhoons.  

_._,_._,_

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[David R. Fordham]

Why is this not an issue with lithium ion batteries used in other devices? What is the physical or chemical difference between Baofeng batteries and lithium ion cells used in, say, laptops, iPads, music players, dashboard GPS units, Android smartphones, and even hybrid vehicles? I've never heard of any of those device batteries having this characteristic.   To the contrary, many of those devices, regardless if cost, are actually designed to be used while their battery(ies) is/are being charged.  Why only Baofeng radios? 

David R. Fordham

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[Robert Wilson]

My guess is because the charger is is exsternal to the device. The things you mentioned the actual charging is internal to the device as well as the devices are designed to also be powered by the charger so the device it self is handling the power going to the battery as well.   

Robert Wilson

KI4GST

Sent from my iPhone 11

On Oct 11, 2021, at 02:01, David R. Fordham <ford...@gmail.com> wrote:



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[Ray Albers]

No, that's not the answer. 

Several of the devices David mentioned - smartphones and iPad for example - have external power adapters that plug into the device, just like the Baofeng radios. And note that all of these are power supplies, not chargers. They don't connect directly to the battery. Some circuitry in the device regulates voltage and current to the battery. 

73

Ray K2HYD 

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[Bob Moore]

Lithium Ion batteries from reputable companies have safety circuits designed into them.  I worked for Motorola designing safety circuits for Lithium Ion batteries for a number of years, and the only issue we would have is from counterfeit batteries.  Some batteries, mostly from China, were being manufactured without any safety circuits at all. They had the Motorola name and logo, but could only be identified as counterfeit by taking them apart. So beware buying batteries that appear to be a fantastic deal. 

73
Bob, KN3Y

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