Develop Bugs

Phone charging and Satnav...is this normal?

Just been on a long run and used the satnav ( google ), and the whole time it was plugged into the cigarette lighter charger.
Despite this, the battery level was running down
Is this normal - that the battery drain using the satnav/gps is greater than the charging rate?

I used mine yesterday for about a 1/2 hr journey, was not plugged in, but batterey was down to about 30%, also seemd to use about 20mb for 15 miles, so watch your usage.

J-Zeus said:
Just been on a long run and used the satnav ( google ), and the whole time it was plugged into the cigarette lighter charger.
Despite this, the battery level was running down
Is this normal - that the battery drain using the satnav/gps is greater than the charging rate?
Click to expand...
Click to collapse
Its been discussed already, your charger is not powerful enough to charge it when using satnav, so the end result is that your charger is just slowing down the discharge. Happens when you are using 3rd party accessories.

Ah - That makes sense -- where can I get a decent one - at a decent price

I'm using the factory supplied lead and still get the same, also used to be a problem with my Touch Diamond 2 WinMo Phone, was hoping Desire would be better and it is... just... If I make sure it is fully charged before I set off I can do about 3 hours with it plugged in before it goes flat, I just keep switching it off while I know where I'm going and only switching it on when I don't! That way you can make it last until it is needed.
Another thing to check is that it is kept cool enough to charge, again, in common with my older HTC winmo phone, the Desire gets very hot while being used for GPS and this can be worse if it is in sunlight on your windscreen, sometimes this can stop it charging at all, (you can tell its in this state because the indicator light blinks alternately orange and green) I angle a vent so its blowing cold air on the phone and that seems to do the trick.
Weird thing with the Desire is that for me it shows the green charge light and battery full indicator right up till it is nearly dead... rather than showing that it is draining
I've also noticed with the Desire that even If I'm just browsing the web it drains quicker than it can charge, even using mains charger, I often get a message "the current is insufficient, please connect to AC" or something like that (when it is already plugged in)
I don't think the in car charger you use would make a big difference, the current/voltage for your cigarette lighter socket is limited by the vehicle electrics (I know mine is fused at 15 amps)
Pauly

You need a charger which supplies 1A. Most 12v cigarette lighter chargers only supply 500mA
I use this one, and plug the USB cable into the "quick charge 1A" socket
http://www.argos.co.uk/static/Product/partNumber/5140927/Trail/searchtext>BELKIN+CHARGER.htm

Are you using Bruts worldwide maps mod? I just installed it. I ran it for literally only 5 minutes, but my phone got really hot and the battery monitor shows the app used 10% of the charge (the phone has been unplugged for 24 hours). I have a strong suspicion that this app is faulty.
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Sent via the XDA Tapatalk App

This has been discussed and solved here http://forum.xda-developers.com/showthread.php?t=670702
Basically most usb car chargers (even 1a rated ones) are recognised by your phone as a data connection and to protet delicate computer usb circuits will only draw 500mAh where your phone requires 950mAh.
An easy mod of either the charger or a data cable will solve the problem. Your charger MUST be able to supply up to 1a.

zzleezz said:
This has been discussed and solved here http://forum.xda-developers.com/showthread.php?t=670702
Basically most usb car chargers (even 1a rated ones) are recognised by your phone as a data connection and to protet delicate computer usb circuits will only draw 500mAh where your phone requires 950mAh.
An easy mod of either the charger or a data cable will solve the problem. Your charger MUST be able to supply up to 1a.
Click to expand...
Click to collapse
Thats why I use the Belkin one, it detects it as a charger only and charges at full rate when plugged into the 1A socket.

Solution for Nitro HD car charger problem

Hello all. New member to your forum but a Senior techie here. For anyone having the issue with the car charger not keeping up with the discharge of the battery, the problem is that car chargers make the Nitro think it is plugged into a PC's USB port. When this happens, the internal regulator only allows about half of the chargers current to charge the battery. The AC wall charger has pins 2&3 shorted which tells the Nitro it's plugged into an AC charger and allow full current from the charger.
I have a USB cable adapter I made with pins 2&3 shorted that I tested and have the results in the below images. With the Nitro plugged directly into the car charger without my custom adapter (pins 2&3 shorted) you can see in the first image the battery status is listed as "Charging (USB)". Doing nothing more than keeping the screen on for 5 minutes, you can see in the second image, that the battery charger was not able to raise the battery level at all from 39%. I then plugged in my shorted adapter between the phone and the same car charger and the battery status changed to "Charging (AC)" as you can see in the third image. I performed the same test and this time the same car charger was able to raise the battery from 39% to 43% in 5 minutes, again with the screen kept on as shown in the fourth image.
There are threads on this board under other phones about the USB Car charging issue and how to make a shorted cable. I would however recommend taking an extra cable and soldering together the conductors for pins 2&3 (usually white and green) instead of just using a piece of foil as others have done in the past. Just remember, the shorted cable can only be used for charging, not data syncing. Happy modding...

Hey guys, I know this is kind of a dead thread, but...
Can anyone confirm that the cable at:
(mobile.brando.com/brando-workshop-usb-to-micro-usb-cable_p04980c0704d003.html)
will work to "A/C" charge my nitro HD. It seems from looking around on the forums that it will, but I have never seen a confirmation.

Here's another option too... Name brand (Motorola) vehicle rapid-charger for only $5 !!!
http://www.amazon.com/Motorola-Vehi...CA/ref=sr_1_14?ie=UTF8&qid=1323890013&sr=8-14
Rated at 950mA and there's customer review confirmation that this charger will show up as "Charging A/C". I just bought 2.

Thanks Namuna - you've been popping up all over this forum huh!
Anyway, I decided to go with the brando cable. I really hope it works as expected, otherwise I'll be using a janky electrical-taped hacked up wire. Or order a mini-micro adapter...

That Brando cable looks fine, I'd be all over it too if it were cheaper.
As to be being all over this Forum?...HELL YEAH! I like backing the sleeper/underdog. When the Nexus One first came out by no means was it a "hit", but it sure as hell was a sleeper/underdog! Now though, the Galaxy Nexus is going to be the me-too phone so I didn't go that route.

The upside of the brando cable is that it has a switch to make it a data cable or a charging cable. So I can keep it with me and decide to either charge slowly or quickly.

red_solo_cup said:
The upside of the brando cable is that it has a switch to make it a data cable or a charging cable. So I can keep it with me and decide to either charge slowly or quickly.
Click to expand...
Click to collapse
Don't forget, the cable can only put through, what the adapter it's plugged into provides. If the adapter is rated =<500mA output then the extra features of the cable are a moot point.
I had the Car Dock for my Nexus One, that monster was rated at 2A! Believe me when I say that phone got HOT when you were doing Nav with it plugged it!...Now THAT'S a rapid charger! A 10min ride to the store (while phone idle, screen off) and that thing would top-off my phone that was at 75%.

I have this car USB adapter.
The top port is rated at 2.1 amps so as to be able to charge an Ipad.
I'm prepared

Nice find red_solo_cup.
I gotta get me one of those
My phone battery usually lasts till the evening and dies while driving back from work lol.

Highest Charging Current for One X

Hi all:
I just did a test on the maximum charging current of the One X using current measurement equipment, and it shows that the One X does not draw above 460mA of current while charging.
With this value, i suspect that the One X limits max charging current at 500mA, which means 3 things:
1) Using any previous generation USB charger (750mA or 850mA or 1A) is good enough. Attempting to use the iPad's charger (rated at 2A) WILL NOT get you faster charging time.
2) When using battery draining applications, the charging current may not be enough for you to both CHARGE and USE the Phone. Thus it might be a better idea to give your One X some dedicated charging time.
3) Some computer USB ports may specify 500mA of output current, but there are many times the available current is less than that. On my USB port, the charging current is only about 300mA at times. So it is better to use a dedicated charger if you have it available. Having that said, however, it is still ok to charge the One X with a USB port at 300mA, just that charging will take longer.
That's all I have to report. Useful information for all.

limestone said:
Useful information for all.
Click to expand...
Click to collapse
Useful indeed. Thanks
Sent from my HTC Vivid using XDA app

I've had mine charge at 780mAh+ before. 1amp HTC charger. Charge rate slows down at the last 20-30% or so. So from 70%-100% battery, charge rates normally slow to about 450mAh.

limestone said:
Hi all:
1) Using any previous generation USB charger (750mA or 850mA or 1A) is good enough. Attempting to use the iPad's charger (rated at 2A) WILL NOT get you faster charging time.
Useful information for all.
Click to expand...
Click to collapse
thanks a lot, i can confirm the statement above because my stock charger is broken and i'm using the ipad's one.
bye

i tried to use the charger for htc chacha and hd2..
both does not work.. red light will light up but after a while it will go off and the phone does not charge..

Charging my HOX while the phones working hard eventually (after say, 5 mins), causes the charge LED to flash green/red. I've had this twice now, once while playing a 720P HD film, and once when playing Glowball.
Both times the phone was very hot, so i'm not sure if the LED thing was to indicate that the battery was too hot to charge, or that the charger could not supply enough power to charge and power the phone at the same time.

fi3ry_icy said:
i tried to use the charger for htc chacha and hd2..
both does not work.. red light will light up but after a while it will go off and the phone does not charge..
Click to expand...
Click to collapse
I'm using my HD2 charger at work every day. It charges at about 400/500mA.
Original charger gives me 650/750mA (lowers at the end)

chaps said:
Charging my HOX while the phones working hard eventually (after say, 5 mins), causes the charge LED to flash green/red. I've had this twice now, once while playing a 720P HD film, and once when playing Glowball.
Both times the phone was very hot, so i'm not sure if the LED thing was to indicate that the battery was too hot to charge, or that the charger could not supply enough power to charge and power the phone at the same time.
Click to expand...
Click to collapse
If the charger cannot cope with the discharge from the game, a pop up message actually appears. If it's blinking means it's too hot. Try not to do anything intensive the last 20-30% remaining (meaning at 70-100% battery).

Nice info thanks
Sent from my HTC One X using XDA

fi3ry_icy said:
i tried to use the charger for htc chacha and hd2..
both does not work.. red light will light up but after a while it will go off and the phone does not charge..
Click to expand...
Click to collapse
Same here... I am using the Atrix 4G (US) charger, it does not charge the phone. The charger gives output of 850mA. It does charge when plugged into the laptop, but I think it will take very long that way.
*edit for posterity*
after a while (I did it when battery had charged to 20%), I could connect the Moto US charger, and it would show as "AC". It would not want to charge through it when the battery was really low (2%), but it would charge via USB in that case. Weird behavior, IMO.

USB limited to 500. AC limited to 1A.
Sent from my HTC One X using xda premium

If you want maximum speed of charging (AC charging) you need:
1A charger with shorted D+ and D- pins (eg, original HTC charger).
iPad charger probably doesn't have these pins shorted, so in this case phone will see it as USB charging (you can check it in settings->battery) and will limit charging current to 500mA. Also lot of aftermarket car chargers will work only in USB mode despite they are able to supply 1A.
Here you can find some info on USB Charging Ports (shorted D+- pins):
http://en.wikipedia.org/wiki/Universal_Serial_Bus#Charging_ports_and_accessory_charging_adapters

When charger is "USB", it will not draw more than 500mA from the charger, and usually it will not charge at all (because the current draw with screen on is higher than 500mA).
When charger is AC, it seems to draw 1000mA - but this is still too low to charge while phone is doing anything, as it will draw 700mA and charge ~250mA top.
I hope this can be tuned in kernel, because it sucks, I also hope that power source can be AC (and not battery - look in dmesg when charger is connected), because battery gets too hot when under load...

colin_ktp said:
If you want maximum speed of charging (AC charging) you need:
1A charger with shorted D+ and D- pins (eg, original HTC charger).
iPad charger probably doesn't have these pins shorted, so in this case phone will see it as USB charging (you can check it in settings->battery) and will limit charging current to 500mA. Also lot of aftermarket car chargers will work only in USB mode despite they are able to supply 1A.
Here you can find some info on USB Charging Ports (shorted D+- pins):
http://en.wikipedia.org/wiki/Universal_Serial_Bus#Charging_ports_and_accessory_charging_adapters
Click to expand...
Click to collapse
Can you post a potential list of car charger which are working at 1mA according to you?

I've only tested few devices:
Extrememac external battery for iPhone/iPad (max 2A) had pins not shorted - USB charging mode on One X (500mA).
Some cheap car adapters - max 1A (according to spec) - USB charging mode on One X.
To fox this problem you should prepare a USB extension cable or micro-usb cable with shorted D+ and D- pins and it should be recognized as AC adapter. I think that also some old HTC phone chargers might come with shorted pins in cable already, but don't know which...

What about the official HTC car charger?

MickyMax said:
What about the official HTC car charger?
Click to expand...
Click to collapse
Yes, that one will charge at the full rate.
There is no list of known good chargers - it's down to luck or a recommendation from someone who found one. You can be sure that any charger advertised as "iPhone, iPad or iPod" compatible will NOT charge your One X at the full rate.
I found one recently in a local petrol station shop. It was £5. I took it apart to have a look and the D+ and D- pins are correctly connected together (via a low value resistor) so it charges at the full rate.
So, I might suggest you look for the cheapest Chinese car charger you can.

USB charging not OK inside a car
zvieratko said:
When charger is "USB", it will not draw more than 500mA from the charger, and usually it will not charge at all (because the current draw with screen on is higher than 500mA).
When charger is AC, it seems to draw 1000mA - but this is still too low to charge while phone is doing anything, as it will draw 700mA and charge ~250mA top.
I hope this can be tuned in kernel, because it sucks, I also hope that power source can be AC (and not battery - look in dmesg when charger is connected), because battery gets too hot when under load...
Click to expand...
Click to collapse
Bingo. I also noticed that when I have the screen on at 100% brightness, GPS and Bluetooth on, i.e. in the car, the USB charger cannot even keep up with the battery drain.
On top of that, the battery gets really hot.
I did not have any of these issues with my SGS2, and frankly, I think it's very disappointing. One should at least be able to stay on the same battery level while doing nothing too fancy and on USB inside a car.

A380 said:
Bingo. I also noticed that when I have the screen on at 100% brightness, GPS and Bluetooth on, i.e. in the car, the USB charger cannot even keep up with the battery drain.
On top of that, the battery gets really hot.
I did not have any of these issues with my SGS2, and frankly, I think it's very disappointing. One should at least be able to stay on the same battery level while doing nothing too fancy and on USB inside a car.
Click to expand...
Click to collapse
There are a lot of factors in the charging current. When you charge, the battery will heat up during the process, especially towards the end of the charging cycle. If you are using your phone at the same time and cause even more heat and charging may slow down to prevent overheating. Also, as mentioned prior, charging slows down as capacity is reached. 100% brightness, GPS, and Bluetooth all on has always walked the fine line of just barely keeping up on my past phones on a 500 mA USB charger. On top of that, this phone is a lot more powerful than an SGS2 and the T3 and big screen produce more heat which may be slowing your charging more.
The problem is a lot of cheap chargers that the phone thinks are USB chargers, not AC chargers, thus causing them to only charge at 500 mA. If you have a proper charger, or a properly modified charger, you should get more like 1A, assuming conditions are right.
In the past I've used Battery Monitor Widget from the Play store to show my charging current on a widget, as well as track and graph battery use, charging current, temperature, etc. Might want to give it a try if you're more interested in charging details.

Im using my htc desire charger and cable (the one that splits in two). It works fine for me but it does take a while to get a full charge. Should i use the charger and cable that came with the phone?

Car Tablet Install Not Charging Consistently.

As the title I'm having problems charging. A lot of the time the battery is discharging and requires being charged inside, where it does charge consistent and fast!
I the car I have a 10amp 5v dc/dc converter providing the power, I have the thick cable OTG from amazon, along with Amazon basic USB cable extensions, and a 4 port hub.
I've used different chargers, even dual chargers with a USB hub that had independent power, I changed the OTG cable, Heck I even changed TABLETS! From a Wi-Fi to an LTE. The only common thread is the backup camera and Timur's kernel.
Considering it charges perfectly plugged into a wall I assume it's not the kernel.
I've seen at least one other with this issue, Any ideas? I've been playing with this for months and as mentioned have changed every aspect of the install except the camera.

fr4nk1yn said:
As the title I'm having problems charging. A lot of the time the battery is discharging and requires being charged inside, where it does charge consistent and fast! I the car I have a 10amp 5v dc/dc converter providing the power, ...
Click to expand...
Click to collapse
These car chargers supply perfect 5.0V while your original Asus AC charger delivers 5.2V (have a look at its specs). Believe it or not, 0.2V makes the difference, and at 5.0V your tablet will not charge reliably. I actually use a regulated PSU set higher, at 5.3V, to compensate for voltage drop on poor USB cables.
Look for 5.2V/2A car charger and use max 1m quality USB cable, no hubs.

Thanks. The charger is indeed 5.2v. Odd. What charger are you using?
This is the one I have: https://www.amazon.com/Converter-Re...1513386282&sr=8-8&keywords=dc+to+dc+converter and it puts out 5.1v
I found it was only getting 8v-10.5v and wired it directly to the car's wiring, I was using spades previously to connct to the Aux power connector, Getting full 14.2v made no difference to the tablet's charging.
Next I removed the tablet and plugged it into a 5v/2amp wall charger using the old OTG and the old 3 foot USB extension cable. It charges consistently between 580 - 740mA. Meanwhile it went dead installed in the dash, again.

fr4nk1yn said:
This is the one I have: https://www.amazon.com/Converter-Re...1513386282&sr=8-8&keywords=dc+to+dc+converter and it puts out 5.1v.... Meanwhile it went dead installed in the dash, again.
Click to expand...
Click to collapse
To diagnose this problem you will have to acquire a simple, cheap USB meter and connect it as close as possible to N7. Note on the attachment my N7, 15cm USB cable and a tester measuring 5.18V. Please post your voltage reading.

I bought a 3amp adjustable DC to DC converter.
Set the voltage to 5.3v initially, then measured at the end of my 1 meter USB extension cable. It was still 5.3 so I dropped it back to 5.2v.
Plugged the tablet in, and it's immediately discharging at 563mAh. No apparent change after some use.

Thanks @k23m for the help. This thing just deteriorated. Something pulling a huge amount of power too. Sucked a fully charged battery to 0 in a day of of running errands. And it was sluggish beyond belief. I thought the ROM might be corrupt.
So I did the battery removal mod. It's working great on the bench so it's being wired up tomorrow. Thanks again.

Car charging issues (standard S20 5g)

So i've had this phone for a few days and took a road trip and camped this weekend. To say the least, I had a good feel of battery usage of this phone for my typical tasks.
During my road trip, my phone started with about 92% when i threw it on the charger and started driving. I noticed it was charging up to 96% and it started to discharge slowly after about an 45 minutes of driving The phone indicated it was being charged. When I purchased this phone I also purchased a 6a car charger (dual port, 3a each), and also some USB-C to USB-A cables rated at 18w. If I disconnected the power for a little bit, and reconnected, it would charge maybe 3-8% before stopping again and I would repeat the cycle to ensure I had enough battery to allow navigation to take me to my destination. Luckily, I made it to my campsite with 82% battery to spare.
Now the strange thing- when I left this morning to come back home, I had 100% on my phone as I charged it with a battery bank fine. I left the phone plugged in to my car charger as I left, and it stayed at 100%. I even let the phone discharge to 94%, and plugged it in and it was able to charge to 100% with the navigation on as well as pandora.
Am I doing something wrong? Am I supposed to be using a USB-C type charger? Maybe I need a better rated cable?
Would love some help. I'm coming from an S7 edge so a lot has changed. thanks!

liberalswine said:
When I purchased this phone I also purchased a 6a car charger (dual port, 3a each),
Click to expand...
Click to collapse
I'm going to guess the charger just isn't that good, which one was it?

peachpuff said:
I'm going to guess the charger just isn't that good, which one was it?
Click to expand...
Click to collapse
It's a qualcomm based charger. https://www.amazon.com/AILUN-Charger-Qualcomm-Adapter-Compatible/dp/B01N8PPY1H

Sometimes while driving these things can work loose in the lighter socket, a slight touch fumbling around near it (my dash cam does this), or some bumps in the road.
I suspect on your outbound trip the charger might have been getting intermittent power from being not quite pushed "home", but on the return trip you could have pushed it in harder and it stayed put.

yrp888 said:
Sometimes while driving these things can work loose in the lighter socket, a slight touch fumbling around near it (my dash cam does this), or some bumps in the road.
I suspect on your outbound trip the charger might have been getting intermittent power from being not quite pushed "home", but on the return trip you could have pushed it in harder and it stayed put.
Click to expand...
Click to collapse
this wasn't the issue as I tried unplugging it and tried various 12v sockets in my car. However I think I did figure out my issue. The new charger i'm using does not use the "PD" protocol that the newest samsung phones use. Also, although the car charger i have is a qualcomm 3.0 protocol, and 36w- it's actually at 18w per usb A socket. The s20 wall charger is rated at 25w- so I'm now looking for a usb car charger that has a dedicated usb c socket with at least 25w of power and supports PD and pps

I'm using this one, no issues https://www.amazon.co.uk/gp/product/B07VP3HLGW/

jonboi said:
I'm using this one, no issues https://www.amazon.co.uk/gp/product/B07VP3HLGW/
Click to expand...
Click to collapse
is "super fast charging" enabled with that charger? I just ordered: https://www.amazon.com/gp/product/B077ZRBPNB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
I read somewhere that the newer samsung devices require PPM protocol in order for super fast charging rates to be active (as well as PD)

liberalswine said:
this wasn't the issue as I tried unplugging it and tried various 12v sockets in my car. However I think I did figure out my issue. The new charger i'm using does not use the "PD" protocol that the newest samsung phones use. Also, although the car charger i have is a qualcomm 3.0 protocol, and 36w- it's actually at 18w per usb A socket. The s20 wall charger is rated at 25w- so I'm now looking for a usb car charger that has a dedicated usb c socket with at least 25w of power and supports PD and pps
Click to expand...
Click to collapse
I've reconsidered using fast chargers after the purchase of the S20, we've started using old 7.5W and 10W AC power adaptors. The 7.5W charger brings the phone up from about 30% to 80% in about 75min and I am fine with that. I have also used the 5W S3 charger but I think I'm happy with using the 7.5W charger.
If I need a fast boost I can always pull out the 25W charger.
I did buy a Belkin 18W PD car charger with the phone thinking "yeah, I need this" but now I will only use it for emergency charging. Tomorrow I'll pull out an old 10W car charger and plug the phone into the 10W socket while I drive around, see what happens.

Well I got into the car at 10:55 with the battery around 26%, plugged it into an old car charger I bought for our S4s (Pleomax, apparently OEM for Samsung) which has 2A & 1A outlets. It's not obvious on the charger which outlet is which but turns out I used the 1A outlet (AccuBattery showed the charging current hovering around 1000 mA).
Anyway, after 1hr of driving to my destination with a 5min break to fill up, the battery reached 66% so the 1A car charger raised the battery by 40% in about 60min, which I think is quite acceptable.
Car connected by BT for phone/SMS, received 1 call only. GPS/NFC etc are usually kept off.