To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Samsung Galaxy A7 (2018) can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!
From 8% to 100% mine takes an hour more or less
Now this is interesting.
I am using usb power meter alongside the supplied charger and cable in the box and I found that even after the phone showed 100% charge it continued to draw current (~300mAh) for another 20 minutes until stopped entirely.
So my total charge time from 0-100% was 2 hours and 44 minutes.
Also for the first ~60% charge the phone draw the full 1.55 amperes and after that gradually dropped down to 0.50 amperes.
While the charger runs little bit hot the phone was cold the entire time.
2 hours to charge from 15% to 42 %
too long
This is way too much. You have probably got defective charger/cable.
But! If you are trying to charge it from a pc then is normal as regular usb ports supply only 0.5A instead of the 1.55A from the original charger.
I just realize charger is defective
Should i fix it or buy new one
Idk if its the cable or adapter
Nowadays chargers are basic inverters with few more stuff.
They have very few components inside but sometimes, usually after hard hitting/dropping on hard surfaces the soldering can get damaged with varying consequence between simply stopping working to working abnormally as lowering voltage, current, overloading and many other things.
For example I had a strange case with fully working charger with healthy components and solder joints but was working on random intervals. It was caused by solder whiskers touching nearby naked track and causing shorts. If it was cheaper charger it would blow, but in this one the overvolt protection was able to save it.
And this is why you can just buy usb power tester like this one
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or even simpler like this one
so that you can check what kind of power your phone actually receive from charger/power bank/pc etc.
Our phone does not have fast charge. As such it will not charge faster no matter how powerful charger and cable you can equip it with. For example I have one with 2x2.4 Amperes supporting QC charger mods and etc. - it will draw only up to 1.55 Amperes within 5 Volts range.
The normal USB 2.0 port can supply with max 0.5 Amperes, USB 3.0 within the basic implementation can supply under 1 Ampere.
In simple language this means with usb 2 it would take up to 8 hours to charge from 0 to 100%, with usb 3 it would take about 4 hours and half from 0 to 100% battery.
Of course depending on the manufacturers you can find usb 3 and 3.1 ports that are able to supply way more current, even values like 3 Amperes and higher.
This is why the best way to charge your phone is to use the supplied charger. The cable is also very important because of the current depending on the used wire gauge.
With cheap cable (using thin wires) you would not only be unable to use the available current, you can find yourself in the middle of fire.
But there is a big problem, the price sometimes doesn`t represent the needed quality.
Notice I`m not talking about durability. I can show you cables strong enough to endure 10 kilograms but with so thin wires that can`t carry over 0,5A trough them.
Put your trust only on products that are widely commented and tested by the buyers.
Now, I have tested the cable supplied with the phone. Although it easily handles the 1.55A current used by the phone if you put over 2A it will get really, really warm. This means the wires are big enough but are not expected to handle high current. In simple words don`t use this cable for other things than charging this phone, just to be safe.
=====================================
TLDR;
If you don`t have the necessary skills don`t try to repair it. Any repair error can easily make it burst in flames. Better try with another charger but make sure it can get you at least 1.5A otherwise it would take really long time to charge.
Is there a fast charger available for this phone??
blake .l said:
Is there a fast charger available for this phone??
Click to expand...
Click to collapse
yes, I recommend oppo charger. In just 2hrs the batt will be full.
Is there a way to charge faster? In my case I can charge my phone maximally at 5.19V / 1.42A. Charging from 0% to 100% phone with such parameters takes more than 3 hours, because amperage is adaptive.
kamil79123 said:
Is there a way to charge faster? In my case I can charge my phone maximally at 5.19V / 1.42A. Charging from 0% to 100% phone with such parameters takes more than 3 hours, because amperage is adaptive.
Click to expand...
Click to collapse
try to use oppo chargers
Related
Hi all, my new Samsuyng Galaxy S2 does not power on anymore.
I installed a new rom and the phone went in a kind of loop rebooting.
After 4 or 5 reboots, now it's totally bricked.
I cannot power it on (everything remains black, no screen, no lits, nothing).
I cannot debrick it using my jig cable (no life signs).
Have I to take back it to Samsung?
TIA
Luca
Have you pulled the battery before trying the jig?
Sent from my Transformer TF101 using XDA Premium App
I did.
I noticed with my digital multimeter that the 3x100K + 1K are gining 240 K... Perhaps not good quality.
May I use a 300 Kohm resistnace instead?
TIA
Luca
Sent from my PC36100 using XDA App
I would just buy a jig from ebay. Since it bootlooped there probably still is hope.
Sent from my Transformer TF101 using XDA Premium App
yes, buy a pre made jig...
and then take it back to samsung if it doesnt work
I had a problem with my phone not powering up. It was going into a boot loop, and then just not giving any life signs. However, it turned out that not powering up was due to the battery being completely drained (showing less than 2.6v). I just used a few probes and elastic bands to put 4v across its terminals at 500mA for a half hour, which gave it some charge, and then put it back in my phone. This worked. So, if you haven't got access to a spare battery, check your battery's voltage. It needs to be at or higher than about 3v to power up your phone. (4.2v is full, 3.0v seems to be the lowest that will power the phone). If you have access to a power source, just connect it up and put 4v across the terminals. Remember to connect the positive of your source to the positive of your battery and negative to negative as well.
If you have a full LiIon battery, you can ever connect them positive to positive and negative to negative, and this trick will also work.
mrnaz said:
I had a problem with my phone not powering up, but going into a boot loop a few times, and then just not giving any life signs. However, it turned out that the boot loop was due to the battery being completely drained (showing less than 2.6v). I just used a few probes and elastic bands to put 4v across its terminals at 500mA for a half hour, which gave it some charge, and then put it back in my phone. This worked. So, if you haven't got access to a spare battery, check your battery's voltage. It needs to be at or higher than about 3v to power up your phone. (4.2v is full, 3.0v seems to be the lowest that will power the phone). If you have access to a power source, just connect it up and put 4v across the terminals. Remember to connect the positive of your source to the positive of your battery and negative to negative as well.
If you have a full LiIon battery, you can ever connect them positive to positive and negative to negative, and this trick will also work.
Click to expand...
Click to collapse
This.
I dont know if its all android devices but some phones in bootloop do not recharge battery.
Ffbf said:
This.
I dont know if its all android devices but some phones in bootloop do not recharge battery.
Click to expand...
Click to collapse
Yep. It's not just that that phone in bootloop didn't seem to charge, it's also the fact that in bootloop, the phone allowed itself to power up even though the battery voltage is below cutoff level. The phone cuts off at about 3v, but my battery was well below that level when it was dead. I charged it manually with the power supply as described in my previous post, and upon the next power up it seemed to boot normally.
Thus I suspect that the bootloop was due to some error allowing the phone to power up with the battery below cutoff voltage, and as soon as the OS loaded, it realized how low the battery was and powered down. This may be a cause of bootloop in other instances as well. Investigation is in order.
mrnaz said:
(4.2v is full, 3.0v seems to be the lowest that will power the phone)
Click to expand...
Click to collapse
I have 3,27 volts...
I did not understand how you externally recharged it.
lmerega said:
I did.
I noticed with my digital multimeter that the 3x100K + 1K are gining 240 K... Perhaps not good quality.
May I use a 300 Kohm resistnace instead?
TIA
Luca
Click to expand...
Click to collapse
You should definitely try to approach 301K with the resistors.
Mine read 300K (3x100K @5%) and works just fine.
I bought 1x200 + 1x300 + 1x1... Now it is 301kOhm perfectly.
I'll try again.
Now I am charging my battery with an external charger
Nothing to do
Now I have exactly 301 KOhm resistance.
My battery is charged to 4.00 Volts.
No way.
Last chance:
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Looking to this picture I cannot understand if the PINs are looking from the front of the connector or the back.
I connected as it were seen from the front of the connector (as if I were looking inside it).
So i took the first 2 left.
Is it correct?
Thanks
lmerega said:
Nothing to do
Now I have exactly 301 KOhm resistance.
My battery is charged to 4.00 Volts.
No way.
Last chance:
Looking to this picture I cannot understand if the PINs are looking from the front of the connector or the back.
I connected as it were seen from the front of the connector (as if I were looking inside it).
So i took the first 2 left.
Is it correct?
Thanks
Click to expand...
Click to collapse
The resistors have to be between pin 4(ID) and pin 5 (GND).
Most of the guys here at XDA are familiar with the hardware components inside Iconia tablets as well as very fond of all hardware weaknesses and strengths of that particular device.
As no surprise its battery capacity is …I would say, insufficient for that kind of a portable device especially given what brilliant job the engineers from apple had been done to Ipads.
Anyway, let’s move on the subject of this post.
The original battery has the specs as follows: 7.4V ,3260mAh .
My experience was quite straight forward – 3.5 hours video playback (display 60% dimmed down) ,4.5 hours wifi browsing/downloading , after 8 hours in stand by ( Wifi ,GPS turned off) battery drained about 25 percent .
That’s very close to a regular notebook and is not exactly what I expected from a 3G / Wifi tablet.
The good news is that not only Acer’s devices are paired with short lasting batteries, so no one should regret choosing Iconia tab, and even better news is about to come soon if we can craft our own supporting battery and make this gadget work overnight .
The battery charger is providing current of 12V 1.5A (1500mAh) and 12V is happen to be one of the most popular voltage used in cars and therefore wide range of cars accessories as well as security cameras and so forth. A brief eBay search led me to a Chinese made super duper battery for security cameras which may be my happy ticket. 12V 9800mAh sounds like a spoon of honey to me. Of course the battery pack looks horrible (OEM cells, blue PVC insulating tape) but it cost less than you might think.
If paired with fancy spiral cable and appropriate DC jack this 350g battery may fit comfortably in your leather belt pouch and feed your lovely monster tab for about 6 + hours
The real power consumption of the tab is about 3260mah / ~3.5h = 800-1000 mA
After simple math we may see that battery with 9800mAh may charge the tab for about 6.5 hours
So my way of thinking is with fully charged internal and external batteries we have about 3.5 hours internal capacity then charge for about 1.5 hours (totally 5 hours ) then another 3.5 hours on internal battery then charge 1.5 hours and so forth until the supporting battery pack is almost drained. If the math in the following chart is correct we may recharge the internal battery up to 4 times without being chained to the wall socket
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So my hope posting this thread is that someone might like to join me in this experiment and share the results. I’m not an electrician and perhaps I may be wrong about my expecting results but if so, I’d like to be advised by someone who knows more than me and would like to put his/her contribution to get this mission complete
Uh. You didn't post a single question, what do you expect? Someone to confirm that yes, the external battery can be used to charge the tablet once you make a proper cable for it?
Yes, it can be used for that. And yes, it'll provide several hours of extra mileage.
It's the general section, no question required. Its a discussion, get over yourself.
Edit, I see it weighs 300 grams, pretty light. Do you have a link?
Sent from my Acer Iconia A500 using Tapatalk
I think it's a pretty sound idea. My question would be, how do you charge the external battery pack?
Most devices have an internal voltage regulator, that shuts the connection when a battery is sufficiently charged to prevent over-charging. Without this little device, you could overcharge your extra battery and possibly explode it.
Charging units (comes with the tab) only convert from AC to DC, not regulate the cut-off supply, at least as far as I know. So you would have to devise a method to supply the correct amperage and voltage, and, shut off when charged.
I got one of these external battery packs. I keep it in my backpack, and it'll recharge my tablet and phone several times over.
heldc said:
I got one of these external battery packs. I keep it in my backpack, and it'll recharge my tablet and phone several times over.
Click to expand...
Click to collapse
Question, what do you use to re-charge the external battery pack?
Inquiring minds wanna know.....
EDIT, just checked the link. Too bad there's no NewEgg in Moscow, but lots of chinese batteries!!!
It comes with a charger, you plug it into the wall, or your solar panel, or your car.
heldc said:
I got one of these external battery packs. I keep it in my backpack, and it'll recharge my tablet and phone several times over.
Click to expand...
Click to collapse
Thanks! I will save that and order one soon, as I am looking to do a prolonged photo shoot with my tablet in "follow-mode" displaying the shots as I take them, and was looking for a reliable way to keep it juiced.
Hi all hardware mod experts/hobbyists.
As we are all moderate to heavy phone users, we need a phone with a good battery life that won't die before evening. However, everyone seems stick to a hone that could work with screen on less than 6hrs, even 3000mah won't help much.
Now, I want to add 1 or 2 more batteries connect in parallel to my current stock batteries. I hope it would multiply the juice, however I would concern about Charging Voltage, safety charging current from Charging IC inside the phone, and Charging Duration. Of cause, adding extra battery will make your phone Fat, ugly and heavy but we have better battery life.
battery type : norminal voltage of Li-ion 3.6v or 3.7v, Li-Po 3.8v and some other battery even mention 3.9v or 4.0v .
Full charge :4.2v.
Charge voltage 4.2v
Current : depend on the phone
duration = capacity / current
Please upload your modified phone by add extra batteries, with your usage experience.
i found this for iPod Touch 6th Gen. He modified by soldered another battery on the back for tripple battery life
I think it is better to use a power bank, safe, easy,maybe not convenient
wangyf5039 said:
I think it is better to use a power bank, safe, easy,maybe not convenient
Click to expand...
Click to collapse
Yep.... It is better to use power bank.... To embed 2 or more batteries may give better time but looks too odd...
???
I'd recommend to if you're gonna add another battery do it with another of the same type because phone Power Manangment IC could have troubles trying to read two or three, if wanted, different batteries, in some cases they have different data read pins(the ones that are not positive and negatives)
Sent from my XT1058 using XDA Free mobile app
If connecting batteries, they should be same voltage and amperage. To get longer run times at the same voltage you connect both positive together, and both negatives together. If they are the same, lets say 3000 mah, then you while get 6000mah. Approximately twice the run time. If one battery is 1500mah, and the other is 3000mah, then you will only get 3000mah when they are connected. They will both only charge to 1500mah, or the lower amperage. If you connect the batteries from one positive to the other negative, on a 3.2 volt battery, then you will double the voltage to 6.4volts and blow out circuits on your device. Personally, I carry solar charged battery packs. I also have an AGM battery for a lawnmower that is 300amps, which will charge my phone for weeks. Any questions feel free to ask. I was a yacht mechanic, so I had to install and fix DC and AC portable power systems.
You better try some software optimization to get a better battery life,like a custom ROM & kernel, root your device,a good app for battery & performance boost which personaly use is called greenfy and it realy improves the battery life by hibernating apps,anyway 3000 mAh should be enough for most phones and better you lose your warranty rooting it,not trying to burn your phone's circuits with other batteries
Hi ! got 5000mah battery installed on my OP3, but it still says OP_3000mah.. How to modify this? Does this need to be rooted? Thanks!
Hi,
I recently did this to a Samsung Galaxy A3 2016 that I had multiple units of. One had a good screen and a battery, but the board was dead. The other one had a dead LCD and no battery. I turned them into one.
All you need to do is make sure that the voltage of the batteries is about the same, and then just solder the + of the first one to the + of the second one and the - of the first one to the - of the second one. Make sure to solder it to the pins beyond the battery controller, so that the second battery doesn't overheat or expand. Then just insert/solder the whole thing into the phone. DON'T use cells without a charge controller.
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This is what I did with the housing afterwards. I screwed 2 separate frames together, which allowed me to house the second battery with no problem. No glue was used and this is very solid.
The pictures are old, I later put a camera lens on it and a new back. I also got a separate NFC antenna, which I stuck on the top battery since the original antenna is on the bottom one.
I hope this helps.
And as for the battery capacity being displayed in the phone, I'm sure most applications such as AccuBattery or Ampere just display the capacity according to the model of the phone. I know that phones CAN measure the voltage of the battery (or batteries in our case), but I'm not entirely sure about phones being able to measure the capacity of the battery on their own. I know my modded phone displays 2300mAh despite the actual capacity being around 4400mAh after the mod.
Please help
Want to knw is it the app defect or my phn defect?
With my stock nexus 6p charger it showed me max current of 1500mah whats wrng?
The day i bought the device it showed me 2950mah.
A couple questions regarding your issue:
Is this the charger that came with the phone, USB Type-C on both ends?
What was your battery percentage when this measurement was taken?
What were you doing on the phone at the time of the measurement?
I assume from your post that question one is a yes. I ask question two because as your battery gets close to full (and in the case of most lithium battery charging) the amperage will lower to finish topping it off. Question three is important because I believe the Ampere app shows the net total amperage flow. Meaning that (a mA in) - (b mA being used) = (c mA total flow). So if you have brightness to max, music playing, etc. then the total mA flow will be lower.
BillyTheRatKing said:
A couple questions regarding your issue:
Is this the charger that came with the phone, USB Type-C on both ends?
What was your battery percentage when this measurement was taken?
What were you doing on the phone at the time of the measurement?
I assume from your post that question one is a yes. I ask question two because as your battery gets close to full (and in the case of most lithium battery charging) the amperage will lower to finish topping it off. Question three is important because I believe the Ampere app shows the net total amperage flow. Meaning that (a mA in) - (b mA being used) = (c mA total flow). So if you have brightness to max, music playing, etc. then the total mA flow will be lower.
Click to expand...
Click to collapse
Yeah am using the same charger usb c to usb
And i checked it on all percentages it ws same it never exceeded 1500 and sometimes it showed me 600 also
I was not doing anything at that time
Just charging my phone what should i do now?
Hmm... I've gotten weird readings from Ampere sometimes. Give the Current Monitor app a try perhaps.
same issue and haven't found any solutions so far
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taiguy said:
same issue and haven't found any solutions so far
Click to expand...
Click to collapse
Could be the charger being defective, hard to say. Or the USB C port. Check if there is lint build up in the port.
TnT_ said:
Could be the charger being defective, hard to say. Or the USB C port. Check if there is lint build up in the port.
Click to expand...
Click to collapse
It's ****ing weird. Never had these sort of issues using the QuickCharge 2.0/3.0 and micro-B connectors.
I cleaned out the port with isopropyl alcohol and compressed air. I've got some 3rd party chargers that register as "charging rapidly" but have yet to see current even close to 3A. Using the same cables, the OEM charger is still stuck on just "charging".
I can't seem to really push past 1.3A regardless of battery state, charger used, or cable.
By comparison, this is what it looks like with 3A charging. The bulk charge rate is near 80% per hour.
I'm only getting a Max of 1500mah power using the ampere app, same power I get as with a standard charger. I'm using the official Huawei 9v2a charger. Any ideas?
brian85 said:
I'm only getting a Max of 1500mah power using the ampere app, same power I get as with a standard charger. I'm using the official Huawei 9v2a charger. Any ideas?
Click to expand...
Click to collapse
Fast charging is not about mAh (this is capacity and should be 4.000mAh) but about voltage. Normal charging is at 5V with about 1.500mA at start, decreasing at he end. Fast charging is at 10V at 1.500mA at start, decreasing at he end. So, same current but double voltage thus charging 2x faster.
For fast charging, you need a special charger, nothing to do with nougat.
brian85 said:
I'm only getting a Max of 1500mah power using the ampere app, same power I get as with a standard charger. I'm using the official Huawei 9v2a charger. Any ideas?
Click to expand...
Click to collapse
You probably mean 1500 milliamps. If the charger is a 2amp charger 2000ma it will charge quicker than a 1500ma charger. I am not an expert on Huawei charging circuit but most new circuits will draw as much as they are set to draw during the charging process without damaging the phone...they use current limiting. If you charge with a standard USB charger many of these are only 500ma... and charging is slow...so check your charger.
I have Nougat on my Mate 8 and it indicates 'Fast Charging' when plugged into the 5 v 2 amp charger which comes with it. You can use a higher amp charger like 3 amps and see if it indicated fast charging... it will not damage your phone unless the phone is faulty.
The method of fast charging with a higher voltage to start is very similar to higher amps... the internal phone charge circuit will regulate the incoming voltage and maximum current it can draw to effect a fast charge.
Finefeather said:
You probably mean 1500 milliamps. If the charger is a 2amp charger 2000ma it will charge quicker than a 1500ma charger. I am not an expert on Huawei charging circuit but most new circuits will draw as much as they are set to draw during the charging process without damaging the phone...they use current limiting. If you charge with a standard USB charger many of these are only 500ma... and charging is slow...so check your charger.
I have Nougat on my Mate 8 and it indicates 'Fast Charging' when plugged into the 5 v 2 amp charger which comes with it. You can use a higher amp charger like 3 amps and see if it indicated fast charging... it will not damage your phone unless the phone is faulty.
The method of fast charging with a higher voltage to start is very similar to higher amps... the internal phone charge circuit will regulate the incoming voltage and maximum current it can draw to effect a fast charge.
Click to expand...
Click to collapse
Huawei Mate 8 is limited to 1.500mA. With fast charging at 10V this is equivalent of 3A at 5V. More would damage the battery. In fact, if you have the time, it is better to use a normal charger at 5V.
paulcl said:
Huawei Mate 8 is limited to 1.500mA. With fast charging at 10V this is equivalent of 3A at 5V. More would damage the battery. In fact, if you have the time, it is better to use a normal charger at 5V.
Click to expand...
Click to collapse
My Mate 8 came with a 5V 2amp charger from Huawei... . It clearly says "Fast Charging" when I plug it in... and it charges faster than all other phones I have had. Efficient charging of a battery depends on the wattage of the charger... and the circuit in the phone regulates the wattage, by current limiting, based on the changing battery voltage, as the battery is charged, and the phone hardware to prevent damage to the phone circuit...not the battery...most batteries can take a lot more than the phone circuit which is micro sized surface mounted components which cannot handle high currents. So if the circuit is designed correctly, which I have no reason to believe it is not... then the circuit will control the wattage no matter what charger you hook it up to provided the voltage is 5V.
Fast charging, High voltage chargers like 9V is regulated by the phone circuit to effect the maximum wattage the phone is capable of handling. Batteries get damaged by high voltage and Lithium batteries are very sensitive to voltages above around 4.3V
C432B560.
All ok.
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AndroMeise said:
C432B560.
All ok.
View attachment 4085185
Click to expand...
Click to collapse
Same here, about double voltage (mine is 9.8V), same current as with 5V. Quick charge is 2x faster.