I tried using the app "Ampere" from Play Store to test the cable EC-21 on Z3TC. (cable I pulled out from a magnetic charging dock of Z1)
With measurements around -120 to -150 mA while not charging, the tests with 10 seconds are:
1) Charging through EC-21, the current drawn by the tab is around 1520 mA
2) Charging through factory USB cable, the current drawn by the tab is around 1130 mA
Note that the tab is brand new. The output of the charger is 1500.
Is the EC-21 cable faulty? Is it not recommended to use this?
TIA.
Related
I bought this wall charger from Amazon and when I charge my phone with it, it shows up as charging via USB instead of AC which means it'll be pulling 450 mA instead of 650 mA. Is there any way to make it detect the wall charger properly?
Voltage is controlled mainly by charger, not phone, so I think your phone charges with 600 mA.
But if you charge with lower voltage, your battery will live longer.
I believe you have to short the middle two data leads.
yokuyuki said:
I bought this wall charger from Amazon and when I charge my phone with it, it shows up as charging via USB instead of AC which means it'll be pulling 450 mA instead of 650 mA. Is there any way to make it detect the wall charger properly?
Click to expand...
Click to collapse
The only way to do that is by increasing USB charging current to 650mA.
Swyped from my Samsung Galaxy SII
LoL ! I have official wall charger which i got with my Galaxy s2 and my phone detect it as USB btw it happens on a custom rom that i am using.
I used ex tweak app from play store ( Works only with siyah kernal) and set usb to 650 mAh
Like I said, short the two data points.
http://forum.xda-developers.com/showpost.php?p=23007631&postcount=1
I recently bought a scoche dual port 21W(dual USB with 2.1 amps per) charger that I thought could charge my 8.4 but it doesn't even seem to recognize it's plugged in. Is this because it needs that extra .3 volts from the stock charger? And are there any multiport chargers capable of charging this tablet?
I have 4-port charger from "Volmate" that I got from Amazon. Works fine. I don't see that same unit any more but they have a 5-port that looks similar:
http://www.amazon.com/5-port-Family...=UTF8&qid=1415848997&sr=8-16&keywords=volmate
The tablet doesn't need the .3 extra volts, it can use a variety of chargers as long as they are 5V 2A, it can even charge hooked to a PC , though the current from a computer would most like just be enough to power the device and not actually charge it.
Not sure why the tablet wouldn't recognize the charger you hooked up, does the battery icon have a X through it?
My Tab Pro can be used with many different chargers which sustain 2A or higher.
frentraken said:
I recently bought a scoche dual port 21W(dual USB with 2.1 amps per) charger that I thought could charge my 8.4 but it doesn't even seem to recognize it's plugged in. Is this because it needs that extra .3 volts from the stock charger? And are there any multiport chargers capable of charging this tablet?
Click to expand...
Click to collapse
It requires the D+ and D- pins shorted together with 1.2 V on them. Google "Charging your Smartphone from USB without fear" Sorry I can't post links.
I cracked open my car charger and changed out the resistors to 330k and 110k. It works now. The chargers that mention having a chip / IC like the Anker chargers with SMART IQ auto detects and works. The .3 V difference is to make up for the voltage drop of the cable, it isn't necessary but it lets it charge faster.
Fox9p3400 said:
It requires the D+ and D- pins shorted together with 1.2 V on them. Google "Charging your Smartphone from USB without fear" Sorry I can't post links.
I cracked open my car charger and changed out the resistors to 330k and 110k. It works now. The chargers that mention having a chip / IC like the Anker chargers with SMART IQ auto detects and works. The .3 V difference is to make up for the voltage drop of the cable, it isn't necessary but it lets it charge faster.
Click to expand...
Click to collapse
They're 33K (to +) and 10K (to -) resistors.
I made few of them so I can charge old type Tab and Note with iPad-like plug.
I'm not sure what this is all about... To charge my 8.4 I mostly use my 1.5A HTC One charger or an older LG 1A. On my boat I'm using a bog standard cigarette lighter USB charger with two 2A outlets (not more than 3A combined). I've never had any problems with any of these.
Why would I need one with shortened D+/D- pins (or do all chargers have this implemented?)
Anyone find charging the Z3TC painfully slow? It takes me 6+ hours to get to full charge using the magnetic connector. Is it faster over USB? Is there anyway to see how much current is actually being drawn without root?
I'm charging using a USB wall wart, 5V/2A rating.
while charging, go to settings/about tablet/status and look what battery state is saying: "AC" means normal charging while "USB" says usb charging. The latter often is usualy limiting to 500mA. This would mean that your wallmart charge or your cable has the connectors wrong so that the device thinkgs it is on a normal pc-usb port.
tonysunshine said:
Anyone find charging the Z3TC painfully slow? It takes me 6+ hours to get to full charge using the magnetic connector. Is it faster over USB? Is there anyway to see how much current is actually being drawn without root?
I'm charging using a USB wall wart, 5V/2A rating.
Click to expand...
Click to collapse
3:50 for me to fully charge on magnetic stand.
magnetic charging
I also experience the same thing with the magnetic changer but when I use USB it does change it faster
I've noticed that as well! That it takes over 6 hours to charge up. It's very mysterious as to why though. I have the usb cord connected to a 5v/2a rated wall adapter, that takes forever to charge it with. Anyone know why or how to get it to charge faster?
So I ordered a bunch of stuff from ebay and amazon and am going to try a few things over the new few days to figure out the slow charging
1). charge using 5V/2A wall wart through a "charging" micro usb cable. This is one where the 3 data pins are not connected, only the 2 power pins. I have a rooted htc one m8 that can measure the charging current and will make sure this setup is capable of >500mA charging
2). same as above but use a micro usb to magnetic port adapter
3). charge using the official DK36 charging dock(not designed for the Z3TC as far as I know, it came with my xperia z2 phone, but the tablet fits in it and charges)
Since theres so many links in this chain(wall wart, usb cable, dock/mag port connector) I figure its worth seeing if one of them is a weak link
Has anyone found a current monitoring app that works on our phone? I tried both Ampere and CurrentWidget with no luck. I'm trying to better understand how my different chargers are working.
Ampere works. You have to use it like disconnect your charger and open the app. When you get inside the app connect your charger and wait. It will calculate
I ended up using an actual current measuring USB device to see how much the phone is actually pulling from various chargers. Some interesting results (long story short, don't just look at the rated numbers). All figures below taken when phone battery at about 65%, so empty enough that phone should be pulling as much as it could, and is the maximum "typical" reading during about 2 minutes of test:
Stock Sony 850mA Charger (comes with phone) - 890mA
Anker 7-port Charger (7 ports rated at 2.1A per port) - 820mA
Samsung 2A Charger (came with a Note 8 tablet) - 1090mA
Bolt Charger/Battery Backup (one port rated at 1A) - 840mA
Bolt2 Charger/Battery Backup (two ports rated at 2.3A total) - 460mA
Wopow Battery Backup pack (2 ports - 1A port) - 770mA
Wopow Battery Backup pack (2 ports - 2.4A port) - 450mA
Kensington Travel Adapter with Built-in USB Ports (two ports rated at 2.1A total) - 460mA
It seems that any charger with two ports gives a low output, even if they are rated for 2+A total. A "good" charger will allow the phone to charge at about 800mA, whether it's rated at 850mA or 2A. The exceptional one is the Samsung charger, I have not been able to get over 1A charge rate on any other charger.
Note: Used the same USB cable for all tests. This is all with a cheap USB current monitor off eBay. It could totally be inaccurate. Take these results any way you wish.
I am using the stock charger for my galaxy s6 and on my charger it shows a rating of 5v at 2.0A but when i test it with "Ampere" app, it shows 1020mA maximum. Is it supposed to charge at this speed? I am using a good quality cable with gold plated connectors and 24awg core. I also tried two different wall outlets
Hey there,
It's a little quirk I have noticed with my phone too... it DOES charge faster... but only when the screen is off... when the screen is on its limited to around 1amp charging...