This information might be out there already, but after noticing the LG charger works much faster at charging my G2 than a Nexus 7 charger, I did a quick test using CurrentWidget to record the charging currents for each setup to see if it's the special LG USB cable or the LG charger base / AC travel adaptor (or a combination of both) which is needed to enable the fast charging.
It's been mentioned here before that there are extra non-standard pins / contactors on the LG USB cable which presumably are used to deliver higher charging current, but it seems that there is nothing special about the LG charger base / AC travel adaptor which use these. Using a standard generic AC charger with a USB port on it is enough to charge the phone quickly as long as the LG cable is used. (and provided its rated for a current output >1.8A)
LG charger + LG cable ......... 1600mA
LG charger + standard cable .... 250mA
2A charger + standard cable .... 270mA
2A charger + LG cable ......... 1600mA
(Tested using D802 running Mahdi Rom 07/29)
well thanks for the info. it is good to know
seanp25 said:
This information might be out there already, but after noticing the LG charger works much faster at charging my G2 than a Nexus 7 charger, I did a quick test using CurrentWidget to record the charging currents for each setup to see if it's the special LG USB cable or the LG charger base / AC travel adaptor (or a combination of both) which is needed to enable the fast charging.
Click to expand...
Click to collapse
Neither. I use a multi-USB charge station and a third party USB cable and get high speed charging on my G2.
A number of cables will work but it seems hit and miss. My Nexus 10 is just the same, but even worse. With the 'wrong' cable it can take 3 days to charge, even when off.
I use a Blackberry Playbook charger rated at 1.8A/5VDC, and according to GSAM it charges at up to 1500ma depending on battery level, about the same as the stock charger and seems to charge it just as fast... pretty cheap too, just over $5 shipped... http://www.amazon.com/gp/product/B0052F7ZWY/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Related
I've got around 4 different micro-USB AC Adapters that I have lying around. One is the OEM Lenovo, One is OEM Samsung (i777 charger + Samsung Micro-USB cable), one is a multi-USB port AC adapter with a micro-usb cable, and the last is an iPad 2 wall charger with a micro-USB cable.
ALL of the chargers except the OEM Lenovo ones don't charge my tablet. When It's plugged in, for a couple of seconds it says Charging (AC), and then it just switches to discharging. I've tried all the aforementioned chargers and cables in different combinations, and the ONLY ones to work correctly is the Lenovo combo.
Is there a specific reason to this? Also tried all 4 cables connected to my PC.. They all don't charge efficiently at all.
look at the Voltage and Amperage of the adapter !
Lenovo use 2A if I remember well, the other use only 1A
quyTam is correct... most USB chargers are between 500mA and 850mA. The dual battery design of the tablets requires a min of 2A to charge correctly. This is why most computer USB ports will not charge the device.
However... the changer isn't the only thing restricting the power. The cable you are using can also effect power. Not all cables are created equal.
I stopped by Staples just after getting my tablet and picked up a 4 port 2.1A USB wall charger. It will charge my phone, Bluetooth, and tablet. There are also really nice 2A "extra battery" devices out there that allow you to a charged battery with you that will power and recharge your device.
I also recommend the dock for the tablet... it has a 65w power supply and charges the tablet in a 1/3 the time then the usb chargers.
where to get a charger
i tried 2Amp chargers....didn't help/
my brother says:
"the pins are slightly different/off/longer/shorter/what DID lenovo do here?"
as a safety i bought:
http://www.ebay.com/sch/?_kw=886605022780&_clu=2&_fcid=100&_fvi=1&_localstpos=&_stpos=&gbr=1
just in case...
it costs an arm and a leg for a microUSB charger, but not charging the device for a couple of days would cost me more :S
just another things that makes the TPT slightly less then perfect
o,O
Charger
I use a Dell Axim x51 charger and an LG cable from an old phone. Seems to work very well and eBay prices for the charger are less than $4.
http://rootzwiki.com/topic/8523-rev...arger/page__st__40__gopid__448194#entry448194
In my experience a 1A charger will also work. Nothing less than 1A will do anything.
I keep my Lenovo charger in my home office and use a 1A phone charger next to my bed for overnight charging.
I too have a 4 port mains to USB charger: 2A but I thought it was distributed to the 4 ports. If all were being used then each port would only be .5A.
Will have to try it out. If it works it would lighten the travel load of chargers.
Gottoon said:
quyTam is correct... most USB chargers are between 500mA and 850mA. The dual battery design of the tablets requires a min of 2A to charge correctly. This is why most computer USB ports will not charge the device.
However... the changer isn't the only thing restricting the power. The cable you are using can also effect power. Not all cables are created equal.
I stopped by Staples just after getting my tablet and picked up a 4 port 2.1A USB wall charger. It will charge my phone, Bluetooth, and tablet. There are also really nice 2A "extra battery" devices out there that allow you to a charged battery with you that will power and recharge your device.
I also recommend the dock for the tablet... it has a 65w power supply and charges the tablet in a 1/3 the time then the usb chargers.
Click to expand...
Click to collapse
That's for sure. I thought the dock was a waste of money until I forked out on Amazon. Saves so much time it isn't funny....
Sent from my Nexus S using xda premium
The tablet needs to see 5.3 V, when using >500mA.
Already thinner USB-Cables increase the voltage drop
so the thinkpad wont charge, even with the original charger.
It may have less to do with your charger than with the cables. I bought extra long (6 and 10 ft) USB cables for charging phone and my TPT. The 28AWG of any length won't charge the TPT. The 24AWG 6 ft and 10ft cable *will* on a 2A charger. I haven't tried other combinations. I believe it will charge on a 1A charger as well, but would likely require the larger 24AWG cable.
Sent from my PC36100 using Tapatalk
Design Flaw in Thinkpad Tablet prevents Landscape Mode Charging for Developers
I actually sent my 1838-22U in for service, thinking that there was a hardware problem preventing charging while connected via USB. At first I had noticed that while connected directly to a PC via USB for development purposes (no docking station), the unit indicated that it was charging. However, it seemed to be discharging faster than it was charging and slowly worked its way down to unusable. Lenovo Tech Support indicated that they had heard of this happening, and that I should send it in to have its system board replaced. I sent it in only to find that all they had done was replace the battery and reload the firmware. I did notice, however, that when I connected the USB cable, it appeared to go into charging mode for a couple of seconds then switch into discharge mode. I asked Tech Support about this and they said they this was actually the way it should have been behaving all along, and that this was by design.
The User Manual (see attachment) states only that it might not charge, and that it will only discharge if the tablet "exceeds USB 2.0 power limits" (i.e. 500ma).
Well, the Thinkpad Tablet seems to be pretty good at doing that.
Here's where I present to the development community a conundrum. How can one develop in landscape mode while charging (even slowly)? In portrait mode, one can use the accessory docking station, which uses its own charger and charges through the proprietary connector next to the micro USB port, while separately allowing the USB to be used for data. In landscape mode, there is no such option. I will accept that the unit may draw too much current to charge well via a 500ma USB data connection, but then Lenovo should provide a optional charger that connects directly to the same proprietary connector used by the docking station. This is done elsewhere. For instance, Motorola realizes that the Xoom draws too much current to charge via a USB data connection, so they don't even bother with it - they provide a dedicated charger connection and charger.
==UPDATE== 25-May-2012
SOLUTION FOUND
The solution to using a data connection and charging the Thinkpad Tablet at the same time, without relying on the portrait-mode-only Dock Station, is to connect through a powered USB hub which supports the USB Battery Charging Specification (with a Charging Downstream Port). The specification provides at least 1.5A, which quite handily satisfies the Thinkpad. I found such a hub, the GWCTech HU2V40, on Amazon for $15.99.
If you get this model, note that only one of the 4 ports can be used for high-current charging. It includes a tiny "Smart Charger Adapter" but which appears to block the data connection (at least when when used with the Thinkpad). In other words, ignore the little black passthrough adapter included with it, and plug directly in as you normally would. The instructions don't explain the purpose of the passthrough adapter.
Hi everyone!
I just wanted to ask this: I just bought a 90W charger for my laptop. It is a "Targus Compact Charger for laptop and usb tablet"
It charges my laptop and also has that usb port which charges through a cable, compatible devices. Only that on that usb port, it says that it charges 2.1A, which is a lot. My phone charger does only 550mAh.
So the question, shouldn't I charge my phone through the adapter?
Thanks in advance!
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?)
I've just upgraded my unrooted LG G Pro 2(D838) to lollipop. Charging through my car usb adapter is now very slow since I updated. I have tried two chargers, both of which were charging at the full rate before, one of which is a genuine samsung charger - they both have over 2A output. The phone does recognise the charger as an AC charging source, but currently isn't charging above about 200mA.
I am using a Samsung AC charger at home which works as normal. I've had a bit of a look online and people are experiencing the same issue with the LG and other lollipop devices. One of the suggestions was to short the data pins on the usb cable, which I have done but this doesn't seem to have fixed the issue. If the phone is off it charges at the faster rate.
What I can't work out is why the charging speed is different between the samsung AC adapter and the car charger, when it detects both as an AC source? Is there some communication between the two, or are there any car chargers that will provide high speed charging that will work?
any suggestions are appreciated!
I have an Astro1 charger (2nd gen, rated at 2A), and have found that it will not charge my LG G5 phone (H850). The phone recognises it as a charging device when connected (I get a message in the notification tray saying that a USB charging device is connected), but I don't see the usual lightning bolt on the battery icon, indicating that it is charging. If I leave it connected the charge level of the phone remains constant – it never increases. I am using the charging cable supplied with the Anker charger, along with a Micro-USB to USB-C adapter. The adapter has been tested with my Anker desktop charger and it works fine.
Any idea why the Astro1 won't charge the G5?
Have you tried different usb cable? Also does the charger work on other devices?
I have successfully used non oem chargers/b micro cables on my h831 (should be same on h850 unless updates blocked it).
Right now its charging from a hard wired b micro 2.1a blackberry charger with b micro to c adaptor.
So yea test charger on another device, check cable/adaptor rule them out.
Sent from my LG-H831 using Tapatalk
I've just tried 3 different cables. The 2nd one was the one supplied with another Anker charger - that didn't work either. However I then tried a third cable which I got from eBay, and that seems to charge fine. I'm surprised that the eBay cable seems to be more effective than the ones supplied by Anker
Are there any aftermarket chargers that will work like the oem Motorola Turbopower chargers?
Pretty much any USB-C charger will work. I've used an old USB power brick with a USB-B -> USB-C cable, I've used my Acer R13's USB-C 45W power brick, and I've used my Choetech 55W 6-port charging station with a USB-C -> USB-C cable. They all work.
If you're looking for something that works with the X4's Turbopower, that's basically just Qualcomm Quick Charge 2.0 under a different name. My charging station is QC 3.0, which works with QC 2.0 devices, which works with this Moto X4. It charges quite fast.
If all you're looking for is a product recommendation, I'd check out this: https://www.amazon.com/Anker-Charge-Type-C-Charger-PowerPort/dp/B01CJ90J6O
crazyates said:
Pretty much any USB-C charger will work. I've used an old USB power brick with a USB-B -> USB-C cable, I've used my Acer R13's USB-C 45W power brick, and I've used my Choetech 55W 6-port charging station with a USB-C -> USB-C cable. They all work.
If you're looking for something that works with the X4's Turbopower, that's basically just Qualcomm Quick Charge 2.0 under a different name. My charging station is QC 3.0, which works with QC 2.0 devices, which works with this Moto X4. It charges quite fast.
If all you're looking for is a product recommendation, I'd check out this: https://www.amazon.com/Anker-Charge-Type-C-Charger-PowerPort/dp/B01CJ90J6O
Click to expand...
Click to collapse
Think our X4 needs QC3.0 for turbo charging. I have several QC2.0 chargers left over from my last phone and they do not charge this device at full speed. Also I'm pretty sure the original Motorola charger that came with it is QC3.0 according to what I've seen. But I've just ordered my first after-market charger (a RAVPower car charger, model VC007003) and can report back when it arrives later this week.
Looks like QC3.0 is the ticket
Here are screenshots of the charging rates using both my old QC2.0 and new QC3.0 chargers. The new one activates the "TurboPower connected" toast message, which the old one did not, and charges at a much faster rate. Gonna check out some QC3.0 wall chargers in the near future now.
Yes.
Anything from Qualcomm's certified list.
The original charger is 5V, 3A (15 Watt). However, most Qualcomm QC 2.0 chargers from 1 or 2 years ago ran at 12V, not 5V for fast charging so they don't support the combination of 5V 3A. It's the same thing that happened with the Nexus 5X which technically didn't have Qualcomm QC either, despite having a Qualcomm CPU. Forget the branding on the charger since it is too unreliable, and just find yourself something that can support 5V, 3A.
Wireless charging station for Moto x4?
Anyone know of a wireless charging station that works on the Moto X4? Got my x4 from Project Fi back in October and now it won't charge with a standard usb c cable. The phone and usb plug gets hot.
I'm using Pleson Fast Charge stand and CHGeek Wireless Charging Patch. The charging patch is kind of unsightly but I don't care, it charges "Turbo" fast.
Uhmmm
SynbiosVyse said:
The original charger is 5V, 3A (15 Watt). However, most Qualcomm QC 2.0 chargers from 1 or 2 years ago ran at 12V, not 5V for fast charging so they don't support the combination of 5V 3A. It's the same thing that happened with the Nexus 5X which technically didn't have Qualcomm QC either, despite having a Qualcomm CPU. Forget the branding on the charger since it is too unreliable, and just find yourself something that can support 5V, 3A.
Click to expand...
Click to collapse
That may explain why my Nexus 5x charger can't charge this Moto x 4 (it takes forever to complete a charge) but technically it still works
I've gotten turbo speeds from several different Quickcharge3 chargers from Anker. As a side benefit, they also do a good job charging my wife's iPhone.
For me this cable and this wall adapter do the trick just fine.