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From: usenet@dolik.dev (Andriy D)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Backup power supply
Date: Thu, 14 Mar 2024 10:28:42 -0000 (UTC)
Organization: Hugayda Station
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The Natural Philosopher <tnp@invalid.invalid> 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