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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 72,139 of 72,318   
   Robert Roland to All   
   Re: How long to charge 9v nimh battery   
   21 Dec 21 19:07:21   
   
   From: fake@ddress.no   
      
   On Mon, 20 Dec 2021 11:22:04 +0100, Marco Moock    
   wrote:   
      
   >Am Sonntag, 19. Dezember 2021, um 05:57:15 Uhr schrieb AK:   
   >   
   >> I have a 9V 180 ma  discharged Nimh battery that I am charging at   
   >> 25ma.   
   >Isn't it 180mAh?   
   >milliampere hours and not only milliampere?   
   >   
   >> How long will it take to charge?   
   >(180mAh)/(25mA)=7,2h   
      
   For nickel based batteries, you normally add 40-50% to compansate for   
   charging efficiency.   
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