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   comp.sys.raspberry-pi      Raspberry Pi computers & related hardwar      26,127 messages   

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   Message 24,302 of 26,127   
   Andriy D to The Natural Philosopher   
   Re: Backup power supply   
   14 Mar 24 10:28:42   
   
   From: usenet@dolik.dev   
      
   The Natural Philosopher  wrote:   
   > On 14/03/2024 07:57, Andriy D wrote:   
   >> This is exactly my concern - I want this think up&running 24/7/365 and I   
   don't want   
   >> it to burn my house down :)   
   >> I guess this is where you'd say 'risk' and 'price' are in a inverse   
   relationship ;)   
   >> --   
   > It is entirely possible to trickle charge a lithium cell at uber low   
   > risk, Essentially you want to current limit the supply at at one tenth   
   > of the hourly capacity so e,g a 2200mAh celll would need to be charged   
   > at no more than 220mA, and voltage limit the charge at 4.2V.   
   Majority of the schemes I've found so far suggest use of NiMH cells as   
   they are less 'combustive'. However cheap AliExpress devices do use Li-ion   
   cells. Confusing :)   
      
      
   --   
      
   Cheers,   
   \aID   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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