If you want to push more than 500mA into your phones then you need a charger that supports one of the quick charge protocols that are used in your phones. Given that most phones are built on Qualcomm SOCs, a charger with their QC protocol is a good starting point.
I suspect that the tablet and charger do support some level of charge negotiation, hence why you are seeing 1A when charging that device. Generic usb-a 500mA chargers are only of any use for charging bike lights, imho. On Thu, 4 May 2023 at 08:26, Peter Merchant <petermerch...@hotmail.com> wrote: > I am just an ancient retired Electronics Engineer, but I cannot see how a > QC3/4/5 charger is going to help my charging. My tests were done with the > same charger and cable and three different devices that needed to be > charged. The only parameter that was changed was the devices, and they > charged at different rates so the implication to me is that the charging > circuitry in the phones is limiting the current. This test was repeated > with as said below with 6 chargers. > > Peter > > > On 04/05/2023 05:10, Hugh Frater wrote: > > Ah, the joys of USB charging protocols. It’s taken nearly 20yrs and they > still haven’t got a reliable, performant solution. USB-pd gets it nearly > correct, but it’s still not perfect. > > Slow charging speeds are also very much caused by the cable type. Back > when I was charging micro-usb based smartphones I went through a handful of > cables and anything that negotiated at <2a went in the bin. There really is > a lot of junk out there. A USB power meter and a qc3 compatible charger is > a good starting point. > > > On Wed, 3 May 2023 at 18:19, Peter Merchant <petermerch...@hotmail.com> > wrote: > >> >> >> I didn't make last night. My problem is the Android phone which I use >> >> for Jitsi now stays permanently ‘Awake’, burning through 100% of >> battery >> >> in about four hours. The battery chart's detail has ‘Media’ as one of >> >> the top two users, but the percentage of all those that are listed is >> >> well under 50%. I suspect Media though because clicking it shows it is >> >> Awake for 100% of the time and used CPU for about 50% of it. Perhaps >> >> that's a dual-core thing. >> >> What app is this battery chart? SWMBO keeps complaining that her tablet >> doesn't hold a charge overnight, and I wonder what she has running. I have >> just installed Accubattery. >> >> Dear S-in-L who is an Electrical Engineer, suggests getting a better >> charger with more oomph. All of the chargers that I have are rated at >> 5V/1A. Charging the two phones in the house shows the device drawing >> approx 500ma, and the same charger on my tablet is giving >1A. I have >> repeated this on about 6 chargers. So it ain't the fault of the charger. >> [ I just plugged my tablet into a powerbank, and it is getting ~667mA. ] >> >> Peter >> >> >> >> -- >> Next meeting: Online, Jitsi, Tuesday, 2023-06-06 20:00 >> Check to whom you are replying >> Meetings, mailing list, IRC, ... http://dorset.lug.org.uk >> New thread, don't hijack: mailto:dorset@mailman.lug.org.uk >> > -- > Sent from my iPhone > > > -- Sent from my iPhone -- Next meeting: Online, Jitsi, Tuesday, 2023-06-06 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
