The image is from GSM Arena. The phone Infinix has only 45W charge capability yet it does slightly faster than two other phones with much faster charging rates(and same battery capacity).
I know some phones throttle charging speeds but that is usually post 80% threshold. Why the discrepancy then?
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I don’t understand that chart really, but charging speed is carefully controlled in the phone, based on monitoring the battery temperature among other things. They won’t charge from 0% to 80% at 100 watts even if they might hit 100W momentarily under the right conditions. Fast charging is hard on batteries anyway. Make sure you are ok with replacing the battery every so often, if you’re going to fast charge regularly.
Maybe battery cell count is a factor.
Yeah, Wh are probably a better way of measuring batery capacity.
Capacity and changing speed are two different things. I know from lipo cells used in Rx models that discharge speed is given in C which is derived from the max charge current per cell IRK. This Indicates that you can charge a battery with two cells faster. Given a good battery management system of course.
I stand corrected, makes way more sense.
Some devices taper off their fast charging faster than others. It doesn’t have to be at 80%. Just as an example you can see the charts in the charging review for the S24 Ultra here: https://www.chargerlab.com/charging-review-of-samsung-s24-ultra/. A fun fact is that since Samsung 45W tapers off so much there isn’t much difference compared to their 25W charging. The difference is 10mins at best. Sometimes the 45W can be just a hair slower even.
As a Samsung owner, yep. I’ve done comparisons between some Samsungs and was surprised that a “slower” charge phone sometimes would charge as fast as a “faster” one, when battery size was accounted for.
I wonder how phone size, battery placement, and materials play into this.
Being able to dissipate more heat while charging will help significantly too.
I’ve had a phone with a ceramic back that would die in minutes in cold weather if I didn’t keep it in my internal coat pocket. It charged much faster than another phone that had a plastic back with a similar battery size and charging capability, even using “slow” charging (using a lower power charger). I can only assume the heat dissipation made a difference as the ceramic one never got even very warm while the plastic one did.
So maybe a combination of everything mentioned here - charge control in the phone, how the controller manages cells, location of battery in phone/heat dissipation, power optimizing while charging (do all of these phones support pass-through? That would influence charge time), etc.
Maybe it’s keeping constant 45w instead of tapering off the more charged it is
Could it be that it’s using less power as it charges? ie automatically shuts off power hungry features while charging?
Good data is so hard to get.
What I’d actually care about is how many minutes of usage does 30 minutes of charging get me in both standard and ekeing out as much life as I can mode.
