Galaxy S20, charges very slow (20+ hrs), unless I am using a rapid charge wall plug

[lakedawgs]

Bought an Amazon refurbished Galaxy S20. It is in great condition. Battery holds a charge just fine. When I plug it in to charge, with a regular wall plug, it can take 25 hrs from 10%-15% to get to full (that is what the phone says when plugged in). When plugged in with a rapid charger it only takes a couple of hours. We have tried 5-6 different regular wall plugs, we are also using a good cord.

Is there a reason that this should be a concern? I don't mind using a rapid charger all the time but this seems odd.
Thanks
lakedawgs

 

[SpookDroid]

When you say 'regular wall plug' this could mean a lot of versions, but long story short, on these large batteries, unless you use a Fast charger (and Samsung's are sometimes very picky as to being compatible with their Fast Charging protocol), it'll take time to fill up. If the port or 'brick' you're using is on the lower end and delivers a low current ('standard' ports can range between 0.5 to 2 A), this will still take a very long time to charge, especially if the phone is on.

 

[lakedawgs]

When you say 'regular wall plug' this could mean a lot of versions, but long story short, on these large batteries, unless you use a Fast charger (and Samsung's are sometimes very picky as to being compatible with their Fast Charging protocol), it'll take time to fill up. If the port or 'brick' you're using is on the lower end and delivers a low current ('standard' ports can range between 0.5 to 2 A), this will still take a very long time to charge, especially if the phone is on.

The bricks I am refering to are all generally older but name brand from old phones we have had, LG, Samsung (older), etc. The fast chargers I have are Amazon purchases that I have bought via reviews and have had good luck with them.

It sounds like, from what you are saying, is that the battery technology with the newer Samsungs has changed. This makes sense. THANKS

 

[B. Diddy]

Welcome to Android Central! Older charging plugs (before the days of fast charging) typically delivered 5W of power at best. Compare that with fast chargers that deliver 10-15W, and the ultra-fast chargers that get up to 20-30W, and you can see the big differences.

 

[SyCoREAPER]

Even with your so called "regular" wall chargers, there is no way it takes 25 hours to charge. You are either using knock-off of knock-off chargers, in which case your house is going to catch fire at any moment or the phone is defective.

Samsung also doesn't use or accept Rapid Chargers, that's a proprietary term used by other manufacturers. Samsung uses Faster Chargers which are USB-PD compliant PPS chargers (unlike all these ludicrous fast charging phones).

Post a picture of the chargers you've been trying and anyone here can tell you without even looking at the silkscreen printed on them if they are crap and should have a fire extinguisher ready.

 

[lakedawgs]

When we use the 'regular' charging blocks it charges my wife's 2-3 year old Motorola and my Pixel 7, 3-4 hrs to charge. When we use the charging blocks on the Samsung S20 the phone is say 25 hrs when at 10%. When we use a couple of rapid chargers we have, not sure of the brand, all the phones charge quickly, 1-2 hrs when low on battery.
I am just wondering if the S20 has an issue. It might not as it seems it might use a new battery technology that the older charging blocks don't work well with.
As said before, I don't mind using a rapid charger only with the S20, I just want to make sure there is not an issue with phone. Sounds like there is not an issue.

 

[B. Diddy]

Have you ever timed the S20 charging with the slow charger? Maybe it's making an erroneous estimate for some reason.

 

[lakedawgs]

Have you ever timed the S20 charging with the slow charger? Maybe it's making an erroneous estimate for some reason.

We let it go overnight and it charged up about 25% in 7hrs.

 

[SpookDroid]

More likely just the phone not 'liking' the other charger blocks (again, Samsung is more strict on which chargers it considers 'compatible' with faster charging) and is likely defaulting to 'trickle charging' (the kind you'd get from a non-USB-C computer port).

 

[mustang7757]

Like mentioned in this thread already if using 5w charger it will charge slower like 3 to 4 hours range but 20 hours either the charger your using is really bad or your device has an issue, another thing if it says that in the beginning within 10 minutes charging does it change to 3 or 4 hours?