linux-kernel - Re: Motorola Droid 4 -- Stopping charger when battery is full

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Message-ID: <ZDfNRogC4ruBE4Xy@duo.ucw.cz>
Date:   Thu, 13 Apr 2023 11:37:10 +0200
From:   Pavel Machek <pavel@....cz>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, sre@...nel.org, nekit1000@...il.com,
        mpartap@....net, merlijn@...zup.org, martin_rysavy@...trum.cz,
        phone-devel@...r.kernel.org, maemo-leste@...ts.dyne.org
Subject: Re: Motorola Droid 4 -- Stopping charger when battery is full


> * Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com> [230307 14:10]:
> > Also, some guys have concerns about charging (and keeping it charged) @4.35,
> > because of the possibly reduced battery life.
> 
> Yes for devices connected to a charger for long periods the battery will
> bloat up within some weeks or months. This happens easily when using a
> lapdock for example.
> 
> A simple and safe solution here might be that we allow charging up to
> 4.35V only once when the charger is connected. Then we let the voltage
> decrease to 4.2V (or whatever known good maintenance voltage) if the
> charger stays connected.

Optimum solution would be user specifying "I want battery full
tommorow at 8am" and doing the right thing.

> For folks wanting to force the charge voltage higher we have the sysfs
> interface.

Yep, we just need to make sure it is usable for this.

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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