45w charging times. Disappointing Unfortunately

[CKwik240]

And I'm reading to use 45w charging you need a USB 3.1 gen 2 cable, which maxes out at 3ft. Wtf. This confirmed? I love my 10ft USB cable

Where are you reading that? A quick search on Amazon and I found a type C cable with a 60 Watt rating.

 

[Dannyb84]

Unless they're using the Samsung 45W charger, I wouldn't look into this test too much. I read an article yesterday (maybe in this site?) that states it's going to be hard to find 45w chargers for the 10+ at first due to the cord and plug certifications required to reach peak charge levels.

 

[friguy3]

I had read it "somewhere" due to Samsung's charging system, only for the 45watt. May just be BS, until we have them and can try I guess.

I remember someone changing usb's and needing a different one to get to 45. The other cord wouldn't max charge

 

[jlangner]

The 50% in 20 minutes is the cool part to me, as someone who has forgotten or been unable to plug the phone in overnight before.

Yeah, I think this is the biggest advantage. You pick up phone and 20% and realize I am leaving in 20 minutes for a couple of hours, I am screwed. With this you can pop on and get a nice boost to last a few hours.

 

[Mooncatt]

Yeah, I think this is the biggest advantage. You pick up phone and 20% and realize I am leaving in 20 minutes for a couple of hours, I am screwed. With this you can pop on and get a nice boost to last a few hours.

That would only hold true if starting near zero. With sealed batteries, it's especially important to practice good charging habits, meaning trying to keep between 40-80%. So if you start at 40%, you'll only see that super fast speed for maybe a 10% boost and then it'll start to slow down.

It seems most are acting as if it would charge 45W start to finish, which simply isn't the case.

 

[charlier180]

I'm now waiting to see the flood of complaints of ruined batteries in under a year because of all these 0-100% tests making people think that's actually acceptable long term on a sealed battery.

This is what I have been thinking. One would suspect that doing fast charging all the time over the long term will shorten battery life immensely. Having to replace the battery in a Note 10+ with another year of payments to make would not be my idea of fun.

Get ready for the dying battery complaint threads. Sooner or later they will be starting.

Will be interesting to see how my 10+ charges using the current wireless charger I have for my Note 4. Slow but sure overnight might be the way I go. Time will tell.

 

[Mooncatt]

This is what I have been thinking. One would suspect that doing fast charging all the time over the long term will shorten battery life immensely.

I was referring more to the act of going below 40%, and especially under 25%, causing greater wear on the battery, regardless of charging speeds.

Faster charging speeds can shorten battery life too, depending on how it's done. Li-ion phone batteries top out at 4.2-4.3V. Traditional charging was variable voltage up to 5V input and variable amperage. The old rule of thumb was a standard Li-ion battery can safely be charged at 1C during the constant current charging stage. 1C means an input current equal to its capacity. A 4,000mAh battery could accept up to a 4,000mA (4A) charge current.

I've been meaning to do some more research into modern chargers with variable voltages. That 45W charger can run at 15V/3A through the cable to the phone. What I don't know is if that is stepped down in the phone to put 5V and 9A into the battery itself (minus efficiency losses, of course). A 9A current would be just over double the N10+'s 4,300mAh capacity, or just over a 2C charge rate. I've seen some speciality Li-ion batteries rated for up to 5C charge rates, but they are bulkier due to the design changes needed to handle the added stress. I doubt that could be done in a phone and remain as thin as they are. I haven't read anything about using higher than necessary voltages, or how it would affect the battery. Without knowing what's going into the battery itself, I'm hesitant to guess how the 45W would affect the battery compared to the 25W.

 

[CKwik240]

So I finally had a chance to do a little research on this. Looks like what we actually need to find a 45 Watt Type C charger with PD 3.0 (this includes the PPS) and a 3A Type C cable (which is a standard Type C cable from what I'm reading).

Source: https://www.renesas.com/eu/en/suppo...fast-role-swap-programmable-power-supply.html

Edit:. Noticed some links to other pages at the bottom and it's better to read the first three sections. The last two appear to apply to manufacturers. Either way, together the pages describe PD 3.0 pretty simply. Looks like he would need a 3A USB 3.1 Type C cable to be sure of compatibility as it's standardized in this speed. Apparently USB 2.0 can have it too but was not a requirement.

 

[EMGSM]

If this is true, then I'm glad I held off on the 45W charger.

 

[boufa]

It is being reported that, as CKwik240 states, you need the right charger and cable combination. The wrong one of either will force the charger to step down.

 

[KruseLudsMobile]

I was referring more to the act of going below 40%, and especially under 25%, causing greater wear on the battery, regardless of charging speeds.

Faster charging speeds can shorten battery life too, depending on how it's done. Li-ion phone batteries top out at 4.2-4.3V. Traditional charging was variable voltage up to 5V input and variable amperage. The old rule of thumb was a standard Li-ion battery can safely be charged at 1C during the constant current charging stage. 1C means an input current equal to its capacity. A 4,000mAh battery could accept up to a 4,000mA (4A) charge current.

I've been meaning to do some more research into modern chargers with variable voltages. That 45W charger can run at 15V/3A through the cable to the phone. What I don't know is if that is stepped down in the phone to put 5V and 9A into the battery itself (minus efficiency losses, of course). A 9A current would be just over double the N10+'s 4,300mAh capacity, or just over a 2C charge rate. I've seen some speciality Li-ion batteries rated for up to 5C charge rates, but they are bulkier due to the design changes needed to handle the added stress. I doubt that could be done in a phone and remain as thin as they are. I haven't read anything about using higher than necessary voltages, or how it would affect the battery. Without knowing what's going into the battery itself, I'm hesitant to guess how the 45W would affect the battery compared to the 25W.

According to Android Authority however, the Samsung charger is a special case, instead of the highest-rate charging of 45W being due to 15V x 3A (which is as per the standard) it actually 10V x 4.5A.

I just bought myself one of these:

MakerHawk Type-C USB Meter Tester Power Meter USB Multimeter Voltage and Current Tester 0-5.1A 4-30V USB Power Tester Multi-function Tester Display Capacity Voltage Current Detector https://www.amazon.com/dp/B07GQLYMR...ag=hawk-future-20&ascsubtag=UUacUvbUpU6614390

 

[Dimas de Leon]

I bought a 45W Charger on Amazon and using the cable the Note 10+ came with, the estimated time it gives me for the phone to be fully charged is a few minutes more than if I used the charger that came in the box.

 

[j_hansen]

I bought a 45W Charger on Amazon and using the cable the Note 10+ came with, the estimated time it gives me for the phone to be fully charged is a few minutes more than if I used the charger that came in the box.

sounds like you need a different cable for the 45w charger then

 

[Nostromo79]

The 25w charger that comes with the Note10 has been a revelation (for the good) and I can only imagine what that 45w will do. That being said it's always good to anticipate needs throughout the day and plan accordingly. Me, I always keep the phone at a 'Ready One' status as though I expect to be whisked somewhere overseas and won't have access to a charger for 24 hours; that's not going to happen but still...

 

[notefreak]

sounds like you need a different cable for the 45w charger then

No, it is the wrong charger.

 

[boufa]

YOU CAN'T JUST USE ANY 45W CHARGER. In this case the charger, cord, and device must match.

There may be 3rd party chargers eventually, but right now, the only way to do the 45w charging AND get the great speeds it promises is to use the official Samsung combination. It is a different standard than the others on the market.

 

[JeromeM]

Might be a bit off topic here but, typically i charge my S10+ (and all previous Samsung devices Note 8/7/4) on wireless charger overnight so I wake up at 100%. Use phone a bit maybe down to 90% then plug it into the car on way to work due to Android Auto and goes back ton100% on my drive. I spend the day with my phone, gets down to maybe 60% I charge it on way home so I get home maybe at 70% then I use it at night and it usually gets down to 10% before bed and the cycle starts again.

Should I really be keeping it between 40-80% only and not let it go below 25%? Especially on my Note 8 after a year my battery life started sucking!

I think I will be fine with the 25W charger personally but will keep an eye out for 45W options as time goes on.

 

[Hermes Hidayat]

It looks like it charges faster at lower percentages though. Like the oh crap my phone is dead and I have to leave in 10 minutes range.

That makes the most sense about super duper fast charging. The point isnt to fully charge, but to give users enough. Thats why manufacturers always say 70% in 30mins/60% in 30mins and so on.

 

[corvette72778]

I bought a 45W Charger on Amazon and using the cable the Note 10+ came with, the estimated time it gives me for the phone to be fully charged is a few minutes more than if I used the charger that came in the box.

That tells me your phone is charging at 15w. Plug in your old Samsung charger and it will be the same. The higher percentage the charge the closer the charging times will be for any charger. But when you're closer to zero you will see larger differences.

 

[Mooncatt]

According to Android Authority however, the Samsung charger is a special case, instead of the highest-rate charging of 45W being due to 15V x 3A (which is as per the standard) it actually 10V x 4.5A.

I just bought myself one of these:

MakerHawk Type-C USB Meter Tester Power Meter USB Multimeter Voltage and Current Tester 0-5.1A 4-30V USB Power Tester Multi-function Tester Display Capacity Voltage Current Detector https://www.amazon.com/dp/B07GQLYMR...ag=hawk-future-20&ascsubtag=UUacUvbUpU6615236

That still only tells us what's going into the phone, not what's going into the battery. Even when looking at speciality batteries I know are rated for higher charge speeds on stand alone programmable chargers, they still follow the standard Li-ion charge protocols. Stage one is constant max current and a rise in voltage. During this stage, the charger still keeps it at around 4.2V input and the charging speed comes from the current. At stage two, it saturates at a constant 4.2V and amperage goes down until cutoff. Phone batteries do go just a bit higher to 4.3V, but I've never seen a Li-ion battery get 15V input unless it was a multi-cell pack in series (phones were single cell). This video shows what can happen if you use too high voltage.

https://youtu.be/osfgkFyq7lA