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Thread: [GUIDE] Fix TF701T Screen goes black and won't turn back on

  1. #21
    Shockwave
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    Quote Originally Posted by Kevinthefixer View Post
    Wow, J., that's quite a summary! Now that you've done your master's thesis, what'll you do for a phd?

    All kidding aside, given the ubiquity of lithium-powered devices nowadays, this info should be taught in, say, third grade. The near-universal ignorance concerning electricity and electronic devices is something I find appalling, inexcusable, and actually dangerous. I often see people attempting to charge electric vehicles through 10 or 20 meters of 1-mm-squared wire, and they wonder why it caught fire.
    I'm an EE, with 20 years of experience. You think that may be enough? My point would be is that there are multiple types of battery technologies out there where there ends up being a multitude of recommended charging techniques along with a list of recommended do's and don'ts. We're a society filled with using these multiple battery technologies on a daily basis where I wouldn't have the expectation that 99% of the people using these devices would know all these do's and don'ts. An engineer who has a focus of knowledge on these battery technologies is expected to know the do's, don'ts and the background reasons as to the why's. Part of that engineer's responsibility would be to encourage implementing designs to reduce the likelihood of the don'ts and designs that would encourage the likelihood of the do's. That's what engineering is about and is where the responsibility resides. The responsibility doesn't reside on the expectation that the consumer reads everything written in the owner's manual and takes classes on battery technology, so they can use the device they purchased. That's typically considered a luxury if they do. When the early released Chevy Volt vehicle batteries were catching onfire, the government didn't step in and say to the customers "read the owner's manual", they said GM, stop selling these cars, and get your engineers working on preventing this problem from happening before considering to sell anymore of these cars.
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  2. #22
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    I suggest you enroll in Battery University. Perhaps a refresher course is all that is needed.

    If you don't want to follow the guides and advice given here that's your choice.

    Almost every item sold has a "user manual". Some have websites and forums you can gain knowledge from. It's up to you.

    I think you'd enjoy the documentary "Who killed the Electric Car"
    Last edited by Swipe; 02-04-2016 at 09:23 AM.

  3. #23
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    Quote Originally Posted by Swipe View Post
    I suggest you enroll in Battery University. Perhaps a refresher course is all that is needed.

    If you don't want to follow the guides and advice given here that's your choice.
    Thanks for the suggestion. In all honesty, I have no interest in learning about batteries. I'm an audio guy and those are the technologies I tend to focus on learning more about. Between phones, tablets, and laptops, I currently own close to 20 different devices. If I was to even try to maintain proper battery etiquette on all 20 devices to ensure I was minimizing the stress and therefore extending the life of the battery it would be a pretty difficult task to balance. I feel I would easily reach the point where the effort exceeded the benefits. If one of the batteries in my devices dies or no longer holds a charge prematurely, I'll go on eBay and purchase a replacement battery for it and do the disassembly/re-assembly. Overall, that would be less time consuming of an effort than attempting to make sure I didn't exceed charge duration and/or discharge amount. My experience so far with the way I currently treat these devices in regards to charging, is that by the time the battery stops holding a charge, I'm about ready to buy a replacement anyways. I've had an iPhone 5 going on 3 years now. The battery needs to be replaced, but at the same time, I'm ready to purchase a replacement phone as well and that's the most likely path I will choose.
    Last edited by Rednroll; 02-04-2016 at 06:34 PM.
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  4. #24
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    Several points:

    Of all these 20 "devices", it's a sure bet nearly all of them have the same general type of battery, ie lithium ion. General procedures are, well, generally standardized for these. Very few chargers are "smart" enough to leave on permanently without consequences.

    I deal with"neighborhood electric vehicles" on a daily basis, most of which still have lead-acid batteries, and most of them are still of the "flooded" variety, that is, their water level must be maintained. Now, you may say that reading the owner's manual is a "luxury"; well, not if you own one of these it isn't. I have taken to turning in some work orders with a notation at the bottom: RTFM, after finding a $1500 bank of batteries that don't even look damp inside. At the top of most of these ROs is something like "check batteries, reduced range". If you haven't read that manual, don't come crying to me if your batteries give out. When I quoted the manual to one customer, he informed me that that was ****ing ridiculous, at which point I requested that he find another shop to take his vehicle to. The battery in a tablet is more like $50 or $60, but the principle is the same.

    The problem with the Volt, as well as Dell and Sony's laptops, and Boeing's new behemoth, was in the engineering. Probably not the engineers' fault, because as I'm sure you're aware, the engineers are often told how to engineer. Liion batteries produce a lot of heat, and in all these cases the problem was insufficient cooling. And since the electrolyte is an organic fluid that is flammable, the result is predictable enough. This lesson has still not been learned; my industry is just now starting to use lithium batteries, and they are still strapping the individual cells together tightly with no space between for cooling, and certainly no heatsinks or fins. Want to guess which battery cell fails first? The center one in a 3X5 array.

    I'm glad you're an audio guy; IMHO we need more of them, but then I'm an audio-awful myself from way back. I remember explaining to a car-audio professional what the mechanical buzzer was for in old tube-type car radios! But I do recommend you branch out some. It's too easy to get trapped in an ivory tower.
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  5. #25
    Shockwave
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    Quote Originally Posted by Kevinthefixer View Post
    I'm glad you're an audio guy; IMHO we need more of them, but then I'm an audio-awful myself from way back. I remember explaining to a car-audio professional what the mechanical buzzer was for in old tube-type car radios! But I do recommend you branch out some. It's too easy to get trapped in an ivory tower.
    I develop complete vehicle infotainment systems, I'm a complete A/V vehicle systems integration engineer. Navigation, telematics, Cloud based apps and computing, Voice recognition, Bluetooth, QNX, Java, Linux, Android OS integration, Cyber security, ANC/ANR, Projection Modes, Over the air secured updating, Vehicle bus specialist (CAN, MOST, AVC-LAN), Autonomous driving integration. Trust me....when I over simplified it in saying, I'm an audio guy, my portfolio of learning is pretty well broad and branched out. I'll let the battery specialists handle taking on the research about batteries. I have a full plate of technologies to learn about and battery technology is just not one of them that interests me and that's not saying anything against those that do have an interest. Worrying if my tablet battery is being properly charged or not, is not really one of them that interests me. I already have a simple solution if the battery dies. http://www.ebay.com/itm/Genuine-Orig...wAAOSwd0BVvH0H


    There are plenty of people who like to discuss the pro/cons about this list of battery types https://en.wikipedia.org/wiki/List_of_battery_types I'm just not one of them and have no desire to be one of them, I'm happy for you if learning about batteries makes you happy. Different folks, different strokes, that's what makes the world go round.
    Last edited by Rednroll; 02-05-2016 at 07:52 AM.
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  6. #26
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    Talking

    It took me about 5 minutes to read the relevant information on the batteries used by tablet manufacturers. I then understood "best practices" and continue to follow advice given both here and by industry experts.

    At the end of the day... these batteries will probably last several years -- and by then you may have another 20 devices.
    Last edited by Swipe; 02-06-2016 at 10:52 AM.

  7. #27
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    Quote Originally Posted by Swipe View Post
    It took me about 5 minutes to read the relevant information on the batteries used by tablet manufacturers. I then understood "best practices" and continue to follow advice given both here and by industry experts.

    Here is a little graphic you can use whenever someone suggests you do some research.... At the end of the day... these batteries will probably last several years -- and by then you may have another 20 devices.
    Lol....really though. This pushing you guys are doing about reading up on proper battery charging etiquette has been like walking into a jehovah witness convention and raising my hand and stating, "I'm not a johovah witness, and I'm not interested in becoming one or learning more about your religion." You can only imagine what kind of attention that would bring me.....well yeah, it's kind of been like that with this constant pushing of the battery information of how I could really benefit in life from reading it, and I don't even have a battery problem I'm trying to solve.

    If you guys want to be the jehovah witnesses of battery charging in this forum, then God bless ya and back at ya!!!
    Last edited by WERA689; 02-05-2016 at 01:17 PM. Reason: deleted cartoon as unnecessary
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  8. #28
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    I don't know about evangelistic fervour over batteries

    But I'd like to ask everyone to stay friendly - humorous banter doesn't always translate into text, text lacks tonal qualities and you can't see the smile or the wink...

    Of course, you always have bunnies....

    Cheers all.
    eejit likes this.

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  10. #30
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    Or pancakes either. How do you get them to dance in unison?
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