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So, I don't know if this is just my device or maybe already known. I don't see it here(or google) so I am going to post this so others can find this info faster than the 2hrs it took me.
Some Li-Ion batteries have a low max charge rate. Meaning you cant "over-current"(mA "Milli-Amps" or A "Amps") them too much(saves life). Well my Razr just showed me this. This can allow you to charge the battery faster if you have one that is tolerant of the "over-current".
Apparently maximum for the Droid RAZR is somewhere between 850mA and 1000mA
Tried using an HTC @ 1A and no joy.. wont charge.. actually says charging.. but the battery seems to have flipped the switch to not charge; and just continues to discharge normally; even the hidden status(dial *#*#4636#*#*) says charging but obviously not! Tried different HTC models and different cables. I am now only using my Moto supplied cable.
Even after it was dead. It would show the charging screen @ 0% and the light would be red. Stating that you cant turn it on cause there is not enough juice to finish boot. It would never go Green no matter how long I waited(10-15 minutes) usually only takes 5 minutes.
Found my OG Droid charger; remembering that it was lower than 1A. It actually is 5v 850mA. Charging away!
Remember the stock charger is rate @ 5v 750mA - this means you can probably use chargers from 700ish to maybe 900ish mA. I cannot confirm these estimates. Anyone else seen any other rates work?
Hope this helps someone down the road. I know it would have helped me!
MODS - Please, if this is wrong info please DO NOT HESITATE to notify me/remove/edit my post. I just want the right info somewhere, cause it was not well documented anywhere i searched via google.
Also - Thinking more on the subject - this could be the "Authorized Charger" bull that Moto likes to put on its devices i.e. The RAZR flip-phone was notoriuosly bad about this. Even my old nextel "beep beep" had this problem with OEM chargers. Had to spend $15+ on the official one. Again - if this info is wrong in ANY way please fix it or remove it.
use official 850mA charger and be happy. Motorola also confirmed using 1A chargers without any problems but any ways original ones are recommended.
Brilliant, my problem now makes sense!
Couple of questions: What does this mean to charging via USB instead of mains? Is it the plug or the cable that is rated to a certain ampage?
One more question. I found another usb plug rated to 300mA. I presume using this will just mean the phone charges slower? It won't have any negative effect on the battery?
Sent from my XT910 using XDA App
Just adding my experience... Have been using an iphone wall charger w/ the usb jack on it and the supplied motorola cable. Its listed as 1000Mah. Battery Monitor Widget shows it charging around 945Mah. Doesn't get hot, charges like a bat out of hell. Down side is phone is about 60% unresponsive during the charge.
Found a little info on this. Apparently different cables, when plugged in, short different contacts to let the device know what it's plugged in to. Resistors change the current. Audio out can tell if it's plugged into a dock versus USB versus wall charger. The Verizon replacement didn't work for me, but an hard incredible one did. They both charged but only the htc recognized computer connections
Sent from my DROID RAZR using Tapatalk
My stock Razr wall charger is 750mA. I use a 1000mA car charger and it works fine - doesn't get hot and charges faster.
But sometimes you do have to be careful. I had a friend who's noob mother fried her Bionic with a charger that was too many mA for it to handle.
__________
Razr XT912 Verizon
HTC Eris via GingerShedBread
strange... my stock charger's rated 850mA.. maybe because i use international GSM version of RAZR.. but it charge just fine..
but even i tried charge it with blackberry's 700 mA charger or my ipod touch 1000mA charger it both charge just fine.. and it feels like the 1000mA charge slightly faster..
too bad i broke my old nokia n900 1200 mA charger..
I'm using an HTC 1A charger: the RAZR doesn't become hot while charging and it's charging faster.
The limit is 1A anyway.
kholk said:
The limit is 1A anyway.
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Click to collapse
dang! so i guess nokia 1200mA charger won't be any good then..
thanks for the info though.. i was thinking of getting myself a nokia charger after read this thread..
Ever since my first motorola I've noticed that the stock charger is 5.1 volts.
Charging with other brands always seem to give worse battery life.
My old Rizr only lasted a day when charged from the USB of my computer, but 6-7 days with the original part.
Some of that is apparent with my car charger too, it says it's taking charge, but sometimes it will run backwards with GPS running..
I experience the charger issue last night.
I had low battery when I went to sleep, put the cable in and it said charging.
Came late to work because the phone drained the battery instead of charging. I used a 5V 1.2A charger and its been working great until last night. And I noticed my original charger is 5.1V 850mA for the Razr.
You learn something new every day!
/J
Is it just me or any one else experienced extreme slow charging on their Droid razr?
USB charging from my PC.. It was almost 3 times faster to charge my previous lg optimus 7 and blackberry storm.
Sent from my Motorola Razr XT910 using XDA App
Yes....... AND....
Those other phone don't draw nearly as much power as a Razr.
So the typical PC does not put out 750mA on USB because the spec says they only need to put out 500mA. If you are using the phone while connected to USB it may never charge. It won't drain either.
tech_head said:
Yes....... AND....
Those other phone don't draw nearly as much power as a Razr.
So the typical PC does not put out 750mA on USB because the spec says they only need to put out 500mA. If you are using the phone while connected to USB it may never charge. It won't drain either.
Click to expand...
Click to collapse
Agreed. Wall charger is best.
Sent from my DROID RAZR using xda premium
I've not noticed anything out of the ordinary with USB charging vs. past phones I've owned, but have found it charges abnormally fast when connected to a wall charger.
Sent from my XT910 using xda premium
PC= trickle charge. its like trying to fill a bath tub with an iv drip
Lol.. Understood.. Off to the phone shop and get another wall charger then..
Sent from my Motorola Razr XT910 using XDA App
Or just get a USB-to-AC adaptor.
Sent from my XT910 using xda premium
Do you mean AC to USB adapter? That's exactly what I plasm to buy
Sent from my Motorola Razr XT910 using XDA App
vash_h said:
Do you mean AC to USB adapter? That's exactly what I plasm to buy
Sent from my Motorola Razr XT910 using XDA App
Click to expand...
Click to collapse
Get a battery monitor app, put it on the charge, see how much charge is actually flowing to the battery... with a 1750 mAHr battery, you can guess the charging time..
From my packard bell laptop with USB charging it gets 850 milliamp...so charging time is around 2 hours.... from a Wall charger it gets 1100 milliamp, so 1.5 hours is enough....
From my HP laptop it has the charging of 450-500 milliamp so it takes around 3 hours...
I have used the manufacturer of the laptop because each USB chipset has its maximum power rating... USB 2 had 500 milliamp at max and USB 3.0 has 900 milliamp of power rating...... so it depends which chipset you are using and which port you are connecting to.....
If getting more confused, try the standard AC charger.....
Also, I think you should make sure to put your phone on airplane mode (or at least turn 4g off) and turn the brightness down while you're charging. This way, more power goes to charging and less to battery draining stuff.
AND if you're willing to spend a little cash, (or you buy your phones at Costco like me) you can get one of the multimedia dock thingies from motorola. It literally charges in 3 hours on there.
Lol.. A wall charger will do fine for me. I've been scouting for the dock, to use webtop application.. But I can't find out over here on Malaysia.
I did find a great widget, battery info, which when discharging, it will display percentage of battery left, and remaining standby time.
However, the best part is, when charging, out will inform you time left to achieve 100% charge.. Its really cool..
Sent from my XT910 using XDA App
vash_h said:
Lol.. A wall charger will do fine for me. I've been scouting for the dock, to use webtop application.. But I can't find out over here on Malaysia.
I did find a great widget, battery info, which when discharging, it will display percentage of battery left, and remaining standby time.
However, the best part is, when charging, out will inform you time left to achieve 100% charge.. Its really cool..
Sent from my XT910 using XDA App
Click to expand...
Click to collapse
... i kinda gave up looking for one.... heck even trying to find the dock for the altrix is a pain... just need to modify the plugs and we can use webtop
Modify what plugs? care to share? I'm interested on this hack..
Sent from my Motorola Razr using XDA App
Math lesson!
The battery is 1750 mAh, that is milli ampere hours.
As such, it will supply 1750 mA, for one hour.
Charging is the same but backwards, 500mA is what the USB port on your PC supplies.
That gives 3,5 hours to supply the battery the required power, assuming 100% efficiency.
But lithium batteries need a trickle charge from 90% to 100%, so that last bit is usually performed in 1 hour, independent of what mAh the battery has.
So on our razr that last 175 mAh will always take one hour to charge.
So that means that we charge 1575mah at a fast speed, that leaves 3,15 hours to charge using USB, and 1 hour to top charge.
That'll give you 4 hours and 15 minutes through the computers USB. =)
vash_h said:
Modify what plugs? care to share? I'm interested on this hack..
Sent from my Motorola Razr using XDA App
Click to expand...
Click to collapse
some dude just opened the dock and extended the plugs. the altrix dock plugs are on the side. he just extended them to the top
Sent from my XT910 using xda premium
Im probably not as heavy a user as some....but Ive noticed the same thing. I unplug my phone at 7:30 and plug it back in at 9-10 at night usually with 20% left and when I stay up late Ive noticed it takes seemingly forever to charge.
I believe it recommended it either the online manual or the quick start up manual to use the charger that it came with. It stated that other brands or 3rd party may not charge the RAZR fast enough resulting with slower than usual charge times.
I have even heard of some people loosing power while it was plugged in and being used. I believe the 3rd party chargers were to blame Like others have said, the USB charging taking FOREVER, a car charger is a little better but not much.
If you download Battery Indicator Pro (from the market) you can set an option on how fast you want the battery to charge via AC outlet or USB.
Will also give you a 1% increment battery display
The Motorola razr can support upto a 1000ma charger..... technically, it means that if u pop it in the wall charger it will charge at 850ma per hour... it will have a full charge in 2 hours.... but a USB port on the PC or laptop is capable of providing only 500ma, so theoretically, it will take more than 4 hours for a full charge....
Sent from my XT910 using xda premium
I just bought razr after owning SGS1 for over 1.5yrs.
the usb charging is unnormally slow! even compared to SGS1 which has 1500mAh.
with SGS1 I used to use it for usb tethering and it charges in about 5 hours to full WHILE TETHERING!
But on Razr idle phone takes around an hour for every 5-10% of battery which is a lot!
I am wondering if there is any kernel fix or workaround that speeds up the usb charging, because this is not natural.
4 hours or even 6 hours is very reasonable charging time, but anything more than that is a lot.
I am thinking there is something wrong kernel wise.
edit: even comparing to HTC EVO 3D which has almost same battery capacity [1730 vs 1750] charges a lot faster than RAZR. and I do mean A LOT!
Recently I traded my galaxy nexus for a galaxy tab 10.1. But whenever I plug it into a computer or an outlet there's a red x on the battery... it charges reallllly slow. I left it to charge for nine hours from an outlet while turned off, and it went from 5% to 55%. WOW. That's really slow. So I thought that the problem is the cable so I bought a new cable that came with a car adapter. And it worked like a charm in the car. However when I traded I kept the 3 pronged galaxy nexus charger. So anyways I arrived home happy, but I wanted to test it in the computer... Red x again. I tried the wall outlet, again with the x. I tried the wall outlet with 110v and 220v still red x. Then I looked at both outputs on the wall charger and car charger both had the same output which is 5volts and 1A. Then I looked at the input and the car charger was 12-24VDC and the wall outlet was 100-240v and 50Hz and 0.15A. I need help please.
I have 3.2 honeycomb and P7500.
I think that this is an internal issue software wise.
If you need anymore information don't hesitate to ask.
Thanks in advance
Sent from my GT-P7500 using xda app-developers app
On stock settings u wont be able to charge the device connected to ur computer and u will get the Red X on the battery icon! Therez a small tweak to activate that feature to activate charge on pc connect but u will loose the mtp connection. As far as this issue... Seems to be a battery proble. Still try to flash and get to stock to confirm.
Sent from my GT-P7500 using xda premium
What do you mean by loosing mtp? Also I'm a bit noobish at this because I just switched from ios. So can you dumb Down what you said a little. And what do you mean by "still try to flash and to get stock to confirm."
Also my problem is wall charging.
Sent from my GT-P7500 using xda app-developers app
I get that if I try use galaxy nexus charger, however if I charge my galaxy nexus with the tab 10.1 charger I have no problems, make sure your using the correct charger, and for the slow charging I have a USB extension cable if I use that it can take up to 12 hours for a full charge
By charger do you mean cable or outlet?
Sent from my GT-P7500 using xda app-developers app
simplest answer is that the red X means that you're not supplying enough voltage to your tablet. You need 2A (A = Amps), computer USB ports generally do 500mA (1/4 of what you need). Phones usually need less. So the reason your tablet won't charge off the phone charger is because it doesn't supply enough voltage; the phone does fine on the tablet charger because it's just oversupplied (don't worry, your phone won't be damaged by this!)
So what you need is:
1) an original charger for this particular tablet (the cable probably isn't the issue, but I've seen cables that can't transmit the full voltage. The nook color is a good example of this)
2) a 2A charger - can't promise any particular ones work though...
3) (and this is the one you should do): You're on XDA. This is a place for folks who root and install custom ROMs on their devices. Most of the ROMs have USB charging built-in (in the Kernel; don't worry about what that means). Install a custom ROM (I'd suggest AOKP). Problem solved, plus you've increased both performance and functionality of your device exponentially. If you're not willing to do this, XDA probably isn't the place for you anyways.
Ayouby said:
By charger do you mean cable or outlet?
Sent from my GT-P7500 using xda app-developers app
Click to expand...
Click to collapse
The outlet , the one for my tab is twice as big as my Gnex one, I guessing they both give out different power, get the official charger!! like I said I can replicate that any time I want by using the tab cable with my Gnex outlet,
Thank you soooo much
Sent from my GT-P7500 using xda app-developers app
I found a solution to a problem that was really vexxxxing me. One of my chargers was working and the other (longer lead) all of a sudden started showing the red cross. Ahhh. The solution (http://www.androidtablets.net/forum...galaxy-tab-10-1-not-charging-brand-new-3.html) was to blow very hard on the 30 pins of the charger and hey presto - started charging again without the red cross.
There are solutions to this problem with quite a few custom ROMs. Task's ICS for example has this patched. I am quite certain there are others.
Is it safe to charge a Motorola Droid Razr with a LG charger which has the following specs:
Output: 4.8V-1A
I mean, will it be safe for the battery like its life and other things?
Standard USB chargers should work with all phones with microusb
Sent from my EVO 4G LTE
lamborg said:
Is it safe to charge a Motorola Droid Razr with a LG charger which has the following specs:
Output: 4.8V-1A
I mean, will it be safe for the battery like its life and other things?
Click to expand...
Click to collapse
No, definitly not. Motorola oem charger is 5.1V and 850 mA. You might not notice anything wrong with the batttery in short term but it might cause damage in long term. Plus, motorola have never been the brand that offered compability to other brand accessories.
well this is depressing to read, the charger that came with my razr a year ago was lost about a year ago. i've used probably 20 different usb chargers from different phones but all were older so i assumed the lower amps / volts wouldn't hurt anything, that only a higher amps / volts could potentially harm the battery.
i do remember the charger that came with it had 2 usb ports on it but it was so weak that it could never charge a second device plugged into it
No dude, if it's higher, the phone will only pull the amount necessary. USB is a universal standard. You're fine, no need to worry. If something uses MicroUSB, then it's universal. USB= Universal Serial Bus. Your phone is safe
Edit: For the record, when I had the Droid RAZR, I used everything from the stock OEM charger, to Samsung and everything in between, including an LG charger.
Hey people,
It doesn't mean it's safe to use another brand chargers if your phone didn't get any kind of damage. My xt910's digitizer went weird after i had to charge it for 30 minutes with a genuine htc charger. My atrix's digitizer didn't work while it was plugged into a nokia micro usb oem charger. A motorola phone should be charged with an oem motorola charger, not a stupid lg charger. Micro usb itself is a standart but it doesn't mean you can use anything that fits into the slot safely !
Your phone will be fine
lamborg said:
Is it safe to charge a Motorola Droid Razr with a LG charger which has the following specs:
Output: 4.8V-1A
I mean, will it be safe for the battery like its life and other things?
Click to expand...
Click to collapse
I think it will be fine, I charge my phone with my sister's Galaxy Nexus charger and nothing has happened so far.
USB always uses around 5 volts and the 1A means that your battery will charge faster than using the regular 850mAh motorola charger.
Semseddin said:
Hey people,
It doesn't mean it's safe to use another brand chargers if your phone didn't get any kind of damage. My xt910's digitizer went weird after i had to charge it for 30 minutes with a genuine htc charger. My atrix's digitizer didn't work while it was plugged into a nokia micro usb oem charger. A motorola phone should be charged with an oem motorola charger, not a stupid lg charger. Micro usb itself is a standart but it doesn't mean you can use anything that fits into the slot safely !
Click to expand...
Click to collapse
Yeah, in my XT910 digitizer went weird too... when I use original Motorola charger...
blyoghurt said:
Yeah, in my XT910 digitizer went weird too... when I use original Motorola charger...
Click to expand...
Click to collapse
Mine too. I don't touch my moto charger these days.
hi all
i bought a hero h9500 a week ago , and this phone takes 8 and 9 HOURS TO CHARGE !! that is total bullshi** , i thought first that the crap charger that came with it is only .5A and slow , but i used my previous nokia charger which outputs 1.2A it was a bit faster but still soooooo sloooooooooooooow. i even thought of buying the original Note II charger which outputs 2A i need to know , is that a problem with the battery , phone itself or what ? i need to know how long does it take to charge ur phones and what chargers are u using ?
thanks
sorry but i am really frustrated that i have to sit 8 hours waiting for this crap to fully charge
mosh11 said:
hi all
i bought a hero h9500 a week ago , and this phone takes 8 and 9 HOURS TO CHARGE !! that is total bullshi** , i thought first that the crap charger that came with it is only .5A and slow , but i used my previous nokia charger which outputs 1.2A it was a bit faster but still soooooo sloooooooooooooow. i even thought of buying the original Note II charger which outputs 2A i need to know , is that a problem with the battery , phone itself or what ? i need to know how long does it take to charge ur phones and what chargers are u using ?
thanks
sorry but i am really frustrated that i have to sit 8 hours waiting for this crap to fully charge
Click to expand...
Click to collapse
i am using the wall charger from my HP touchpad, and my h9500 only takes about 3 hours to charge. pc usb port takes forever.
hope this help
How much output does that charger have?
Sent from ZOPO ZP900, using cracked Tapatalk 2
mosh11 said:
How much output does that charger have?
Sent from ZOPO ZP900, using cracked Tapatalk 2
Click to expand...
Click to collapse
actually, i made a mistake. i'm using the charger that came with an HTC one X. its a 1A charger. i will try my hp touchpad charger which is 2A, to see if it makes any difference
Mine talks about 6 hours from 10% to full. I just leave it overnight.
Sent from my unknown using xda app-developers app