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Asking for a suggested power controller for a battery charger

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(@poundsand)
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Joined: 9 months ago
Posts: 9
Topic starter  

Posted by: @zander

Do you have the batteries disconnected? If not you are reading the charger output, not the battery voltage.

There is no charger connected, being accused of trickery? I see this is NOT the forum for me.

I'm out of here


   
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(@poundsand)
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Joined: 9 months ago
Posts: 9
Topic starter  

@dronebot-workshop

@codecage

Please delete my account


   
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Ron
 Ron
(@zander)
Father of a miniature Wookie
Joined: 4 years ago
Posts: 7326
 

@poundsand NOT trickery, just a common mistake.

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.


   
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(@davee)
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Joined: 3 years ago
Posts: 1761
 

Hi @poundsand,

 I am certain Ron (@zander) was not accusing you of trickery, and he is correct in saying that having the charger connected is indeed a common mistake. Ron kindly answers a lot of queries, and a fair percentage of all the queries include the questioner making a mistake .. which we all do from time to time.

----------

Li-ion batteries are not a 'single design fits all', but rather there are several variations, and their no-load voltage varies accordingly. Furthermore, some chargers may tend to charge to '100%' , whilst others may cut off before reaching '100%', to increase the life of the battery.

For comparison, I just checked a single 18650 cell from a headtorch I bought recently, and it registered 4.06V.

I don't claim my multimeter is particularly accurate, though it usually shows what I expect, so I think it is reasonable.

But obviously, if I had 4 such cells in series, then the voltage would be 4 * 4.06 = 16.24 V

  So your reading of 16.42 V, give or take a reasonable meter margin, appears highly plausible, but may differ from other peoples' experience.

Best wishes, Dave


   
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