Database Users

[Q] Charging through microusb

Has anybody noticed that you cannot charge the tablet through the microusb port? I use this tablet at work in my car and I cannot get my existing charger to do anything so i took the tablet inside and plugged it to the computer for conformation and it doesn't charge there either. So I guess I'm gonna have to find a DC charger for this. Anybody know where I can get one cheap?

The Acer doesn't use a proprietary connection to charge so you should be able to find a generic charger that fits with the same barrel connector 12Vdc 1.5A (1500mA) - another plus over the Asus

Check your local Radio Shack store for a universal charger that matches. Heck, Wal-Mart might even have it, Best Buy probably will as well.
This question about charging over the USB comes up a lot - but that'll probably never happen with 10" tablets. The screens are so big, that makes the batteries need a lot more power, and USB just isn't designed to produce the kind of amperage required to charge it.

I just bit the bullet and bought a good inverter.

abmcbride85 said:
Has anybody noticed that you cannot charge the tablet through the microusb port? I use this tablet at work in my car and I cannot get my existing charger to do anything so i took the tablet inside and plugged it to the computer for conformation and it doesn't charge there either. So I guess I'm gonna have to find a DC charger for this. Anybody know where I can get one cheap?
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This is what I have currently. http://goo.gl/WKniM
Black and Decker has a new model now that looks different http://goo.gl/2LV4X but it's worked out very nicely for me. I swear by it. It's saved my phone so many times as well as my previous tablet.
I went by reputation to get it as it shuts off before it causes your vehicle's battery to die (if your battery is weak). Many of the others will drain it until your vehicle can't start.

RnRExpress said:
I just bit the bullet and bought a good inverter.
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How do u connect the inverter to the tablet, what cable do you use or does it come with a suitable plug?
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[Q] charger replacement for kindle

can i use any charger that can fit into my kindlle fire?
i have a charger of LG optimus one and it fits exactly.
i cant find shops selling kindle fire charger here in the philippines.

the original has 1.8A - would try to get one that has around this value
with a charger under 1A i'm pretty shure you'll get charging problems or at least it lasts very long
basically you can use every usb charger ...

Yes you can as long as a charger has equivalent current as the original charger.
Sent from my Amazon Kindle Fire using Tapatalk

I lost mine and just been using the iphone wall charger with the mini usb cable and it's been working fine. Does charge pretty slow but that's all i can do for now.

Any USB charger will work, but one with less current won't charge as fast.

mugabuga said:
Any USB charger will work, but one with less current won't charge as fast.
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No... I got a charger off ebay and it said it was for the Kindle Fire, but it was only 1000 ma. and I had all kind of problems, There are several threads on this already..Get one at least 1.8 amps and you'll be ok..

The Kindle Fire will recharge from a powered USB hub or computer just fine, and that's only 500 mA. The USB spec doesn't allow for anything greater, so you may run into incompatibilities with other chargers since compatibility is the main reason we have specs. Hopefully manufacturers are talking to each other about how to make fast chargers, but, given Houndog101's experience, it doesn't seem like that's always the case.
The Kindle has a 16.3 W*h battery, so you can calculate how long it'll take to charge given any current (5V * current = Watts), if you account for the loss due to the Kindle being on at the time. A standard USB port is going to take at least 7 hours to fully recharge the Kindle, and probably more like 10+ if WiFi is on. So I'd definitely go for a 1.8 A charger, and hope for the best. Don't spend too much since it might not work unless it's specifically made for the Kindle.

Belkin F8Z630 charger
I've bought several of the Belkin F8Z630 chargers and been very pleased with them. Not cheap, but they deliver a solid 2.1 A at 5 Vdc, they can handle any input 100-240 Vac (basically worldwide usage), and they have a nice rotating plug feature that is handy in some tight spots. Works great for charging the KF quickly.

I found one in my car from an LG that chargers it just fine, and in a timely manner.
What happened to the stock charger? The one that cane with my fire did not work at all
Sent from my GT-P1000 using xda premium

TF300 32gb review and comparison

I have been going through 10" Android tablets like good beer (no driving of course). So far the A500, Thrive, Prime, A510, Excite Quad 16gb and now the TF300. Many reasons for returning them:
A500 = Weak wifi and visible verticle screen lines.
Thrive = Kept it, but sold recently due to poor Tegra 2 video support
Prime = Weak wifi, iffy touch response
A510 = Gets too warm/hot on right side- this also impacts battery life if sustained. Also has visible verticle lines, but not as bad as A500.
Excite Quad = Bad light bleed, poor file support, battery drain issues and crazy big connector (the footprint of that and the cable is about the same space as the tablet). File management was also an issue (like the Thrive, the Excite is poor in this regard).
Office Max has (at the moment) the TF300 on sale for $350 and the keyboard for $100, so got both for the same price as the A510 and Excite. This seemed too good to not jump on, so got both yesterday morning. Here is a review/comparison with the A510 & Excite:
Build = Good, but A510 and Excite are better
Display = Some light bleed bottom right corner, but IMO, better display than the A510 and Excite and GREAT touch response like the Excite.
Sound = Kind of weak and not on same level as the A510 and Excite. Headphone sound is good.
Performance = About the same as the A510, which is very good. Excite seemed a little better and benchmarks support this.
Heat = Coolest tablet I have used. The A510 gets hot when using the GPU and even the Excite gets warm.
Wifi = Great. All three perform fine, but the 300 appears tops.
File management = Great. Seemless with dock. I have a 64gb loaded in the tablet and a 128gb card loaded in the dock. All apps work fine and media is stutter free. Ditto for 64gb thumbdrives too. IMO, this tablet equals the A510 and both are FAR better than the Excite.
GPS = Seems fine, but I do not use it on tablets.
Keyboard = Better than expected and game emulators are more playable than using virtual pads (though touch is good). Handy if no controller is around. Speaking of controllers, they work as good as my laptop.
Battery life = Only had less than 24 hours, but battery life is in between the A510 and Excite, which is good. Seems the battery life will actually be better than the A510 with dock attached.
Stuff I do not like:
Plastic docking section. Not sure how long this will hold up compared to metal. Metal would seem a better option for the back and the curved section the tablet seats in.
Proprietary connector. I prefer the A510 design since can use a normal micro USB in a pinch for trickle charge with a computer.
No USB connector on tablet. This seems flat out silly to me. Even Samsung is adding them now. I have already had a few times where I was at another computer, but had no way to transfer data. At least with the iPad the cable is so common you can get one in a pinch- not so with this. The good news is the Asus cable is small like iPads and not a giant monster like the A510 (what were they thinking?).
I will restate more directly- It is flat out STUPID to have no USB, but no connector on this tablet is by design, since Asus has already stated with the Prime and Transformer they made the most margin on the docks, so want people to buy them.
As a complete system, the tablet and dock rock, but just as a tablet, the usb issue is huge to me. If the total price was $550 rather than $450, I would not have bought this, since too close to laptop price territory for me. Not sure I would just have the tablet though, so total price drove me to the TF300.
Net result is all current tablets have issues and there really is no "perfect tablet", IMO. If I did not have or want a laptop, even at $550 the TF300 is good. For what I paid though, the TF300 and dock rocks hard!
Note: Acer just released their A700 and the performance seems to support concerns Anandtech had that the Tegra 3 efficiency sweet spot is 1280X800 and anything beyond that appears to trend in diminishing returns. Until Nvidia pulls an Apple and makes a more robust GPU for the Tegra 3, I think users are better off with a good IPS 1280X800 display.

Asus does make a 40-pin to USB 2.0 converter for the tablet. It costs around $32 on E-bay.
You stated that you didn't like it not having one because you couldn't trickle charge it from a computer. USB connectors have an output of .5A max, the TF300 charger is a 2A. That effectively means that you'll have to be connected to a PC 4 times longer to get the same charge as from the charger. Even charging an advanced phone from the USB port takes forever. In my opinion, that is completely unreasonable as an expectation. USB on these things is for data transfer, not charging.

I really love how fast the TF300 charges. From empty to full in about 2 hours.

meatrocket said:
Asus does make a 40-pin to USB 2.0 converter for the tablet. It costs around $32 on E-bay.
You stated that you didn't like it not having one because you couldn't trickle charge it from a computer. USB connectors have an output of .5A max, the TF300 charger is a 2A. That effectively means that you'll have to be connected to a PC 4 times longer to get the same charge as from the charger. Even charging an advanced phone from the USB port takes forever. In my opinion, that is completely unreasonable as an expectation. USB on these things is for data transfer, not charging.
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The reasons were charging and data transfer. The nice thing about trickle charge is you can use the device or transfer data and not take a battery hit. Handy if without the stock charger for extended time.

rushless said:
The reasons were charging and data transfer. The nice thing about trickle charge is you can use the device or transfer data and not take a battery hit. Handy if without the stock charger for extended time.
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True that! But come on - 10 -15 hours worth of transfer? Still, we would have to have some type of USB cable, standard or proprietary. Standard would definitely be better. Like you said, at least it's not the 510's cable!

Edit :was reading and posted by mistake.. Anyways I'm loving the Tf300t . I use this as a netbook replacement since all i use latops is for internet and MSword and this lasts much longer. Sometimes II'm using this all day and with wifi on i have to charge it once through the day with the dock. but thats over 12 hours nonstop with no screen off ... I use it heavily constantly streaming video,torrenting, web etc so its reasonable I think

meatrocket said:
True that! But come on - 10 -15 hours worth of transfer? Still, we would have to have some type of USB cable, standard or proprietary. Standard would definitely be better. Like you said, at least it's not the 510's cable!
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Fair points. Sadly, I am having massive battery drain issues I mentioned in another thread. It has happened twice in a row in a very clean environment (restarted and no apps using notifications). If I do not figure this out soon I will return both. That said, since using a stock device there should be NOTHING to figure out- it should just work.
I am wondering if leaving my 128gb sd card in is leaving the dock active, but battery use only shows (two tasks) most percentage being display and then some for idle. No media activity and the files on the card are PSX games and video (the PSX has .nomedia in the directory). The Toshiba Excite would burn over 12%, but was a media task doing it (Toshiba issue). In this case, only the display and idle shows as using battery.
Just last night in 6.5 hours from 100% in both, it burned through the dock and 35% of the tablet. The display was off before going to sleep and checking in the middle of the brief night. I got a great deal on the both, so this is bitter irony.

rushless said:
The reasons were charging and data transfer. The nice thing about trickle charge is you can use the device or transfer data and not take a battery hit. Handy if without the stock charger for extended time.
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Not really sure what the problem is... The part of the cable that plugs into the charger is a USB connection, so you can transfer files to/from your comouter. It also trickle charges just like you want. I know because when I was messing with creating a Debian chroot image, my tablet was connected to my laptop for a long time and inched its way from ~50% to 100%. It took a loooong time, but it charged.
Really, the only downside to the proprietary connector is that you can't just use any micro-USB cable you want; it has to be the Asus cable.

Cool. Did not know on the trickle. Now, if I can just solve the battery drain to avoid a return. Love the dock & tablet system, but the battery drain is a killer.

rushless said:
Cool. Did not know on the trickle. Now, if I can just solve the battery drain to avoid a return. Love the dock & tablet system, but the battery drain is a killer.
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I'm watching your other thread on the battery issue. Please update when you know something. Sorry to hear you're having this problem. There's nothing that sucks worse than a new toy that won't work right!

Does the trickle charge only work with the tablet? While connected to my computer when using with dock attached, the dock drained to nothing and the tablet did not charge once the dock was dead.
I guess I answered my own question perhaps, since the dock did not charge at all and no way for the tablet to use the USB source since feeds through the dock which died. It is a series charge flow.

Can i use a USB 3G stick with OTG on the nexus?

before signing up for another data line, was wondering if i can use a otg cable and stick a 3G usb stick to use data on the go
would this thing drain my battery too quick if it does work?
any experience and input are appreciated.

Might be better to get one of those mobile hotspot things where it has it's own battery...if you can. I would guess even if it can work, it would drain your battery very quickly.
Sent from my Nexus 7 using Tapatalk 2

In theory it could but in practice it wouldn't be viable. Better off tethering if you can.
Sent from my Nexus 7 using Tapatalk 2

thanks all, i tend to tether so much that i wind up with a dead battery on my phone when i am on the road
i'd suppose i can get another cheap 3G phone for tethering only thanks!

U can otg--- > USB cable--->phone.... I found my n7 will charge my thunderbolt for situations where I can't get to a car or ac charger. Haven't tested what a full charge would take timewise/toll-wise on n7 and I would assume your phone battery might keep draining even while leeching power from the n7 if you are tethering and using heavy bandwidth

wtfmate913 said:
U can otg--- > USB cable--->phone.... I found my n7 will charge my thunderbolt for situations where I can't get to a car or ac charger. Haven't tested what a full charge would take timewise/toll-wise on n7 and I would assume your phone battery might keep draining even while leeching power from the n7 if you are tethering and using heavy bandwidth
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well.....wouldnt that drain your tablet then? lol, kinda defeating the purpose now

Yes troll it would drain your tablet but not as much as a 3g dongle through USB. Did you even read the thread? What do you think the "purpose" is? I didn't say its ideal I said for situations where your phone is about to die from tethering and you need a little charge. Just trying to help.

Since wii're throwing out ideas, I picked up a 5000mA battery charger for $25. It was on sell, so don't expect that price. My Nexus 7 doesn't accept the charger for some reason, but my phone would charge from it. So you can tether and always be able to charge your phone. The thing I have is about the size of a MiFi thingy. LoL!! I think they're going for about $60+ now. Since my E4GT has a 1800mA battery, I technically have 3 batteries with a remainder of 1400mA. That's practically 4 batteries. LoL!! =.P
I bought something "like" this. Looks very much alike except it wasn't from China and it had a 1A and 2.1A port. And I have no idea where "solar" is even coming from. The one I have has nothing "solar" about it. LoL!!
http://www.ebay.com/itm/New-5000mA-...ccessories&hash=item2c650dd34a#ht_2856wt_1197

wtfmate913 said:
Yes troll it would drain your tablet but not as much as a 3g dongle through USB. Did you even read the thread? What do you think the "purpose" is? I didn't say its ideal I said for situations where your phone is about to die from tethering and you need a little charge. Just trying to help.
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Obvious asshat is obvious. The guy points out a fatal flaw in your thinking and suddenly he becomes a troll? You need to brush up on your definition of troll.
I haz no sig

No_Nickname90 said:
Since wii're throwing out ideas, I picked up a 5000mA battery charger for $25. It was on sell, so don't expect that price. My Nexus 7 doesn't accept the charger for some reason, but my phone would charge from it. So you can tether and always be able to charge your phone. The thing I have is about the size of a MiFi thingy. LoL!! I think they're going for about $60+ now. Since my E4GT has a 1800mA battery, I technically have 3 batteries with a remainder of 1400mA. That's practically 4 batteries. LoL!! =.P
I bought something "like" this. Looks very much alike except it wasn't from China and it had a 1A and 2.1A port. And I have no idea where "solar" is even coming from. The one I have has nothing "solar" about it. LoL!!
http://www.ebay.com/itm/New-5000mA-...ccessories&hash=item2c650dd34a#ht_2856wt_1197
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Click to collapse
Do solar powered battery packs like that even exist?

car charger

Any idea why I can't seem to charge my Nexus 7 with my car charger?
i have both a generic Micro USB charger and I have one of the dual USB ports that you put into the cigarette lighter. It wont even acknowledge that I have plugged anything into it.
i have used the USB port to charge MANY different cell phones my old Dell Streak 7 and even a friends iPad.
Any ideas?

joeclark said:
Any idea why I can't seem to charge my Nexus 7 with my car charger?
i have both a generic Micro USB charger and I have one of the dual USB ports that you put into the cigarette lighter. It wont even acknowledge that I have plugged anything into it.
i have used the USB port to charge MANY different cell phones my old Dell Streak 7 and even a friends iPad.
Any ideas?
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I think the N7 needs 2A to charge. a single USB is 500 mA and the dual 1A, so I don't think there's enough power.
Also check if the output of your microUSB cigarette charger is 2A

zaphyr said:
I think the N7 needs 2A to charge. a single USB is 500 mA and the dual 1A, so I don't think there's enough power.
Also check if the output of your microUSB cigarette charger is 2A
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well i think that answers my question. thank you

This one will work: http://www.amazon.com/gp/product/B0090SVY3K/ref=oh_details_o02_s00_i00
It charges at the same rate as the stock AC charger.

The N7 is one picky device for charging. I have several chargers for the car that charge the iPad but not one will charge the N7. Same as AC chargers. This set works for me
http://www.amazon.com/dp/B008FF84K0/ref=pe_175190_21431760_M2T1_ST1_3p_dp_1

This is what I use and it works just fine. I use it to charge my N7, GNote, Nook Color or my grandsons IPhone and it works equally well on all of them.
BTW, it prime available if you are a member.

dparrothead1 said:
This is what I use and it works just fine. I use it to charge my N7, GNote, Nook Color or my grandsons IPhone and it works equally well on all of them. Very unobtrusive and I like the fact that the fuse is easily accessable.
http://www.amazon.com/Ultra-Compact...sr=8-2&keywords=ultra+compact+usb+car+charger
BTW, it prime available if you are a member.
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That is exactly what I need to get.
Thank you.
Sent from my Nexus 7 using Tapatalk HD

It only charges via usb when the screen is off or when the device is off. Try plugging it in checking the battery % leave it awhile and then recheck the battery % you may find its gone up!
Sent from my GT-I9000 using xda app-developers app