I think I found the way of improving the battery of tablet as in the title. The battery compartment has dimentions 126.5x67.5x5 mm.
The original battery pack is wired and of capacity ca 1800 mAh so it does not last long.
I found on eBay batteries that will fit in the battery compartment, 3 of them, and they need to be connected in parallel. That will give 5400 mAh capacity at 3.7 V. Each battery has wires and has the size of 56x36x5 mm.
Here is the link:
http://www.ebay.com.au/itm/180850958176?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I ordered the batteries and will post further when i install and test this solution. My only concern is that the batteries connected in parallel need to have identical voltages at the moment of soldering them together (to avoid high currents between them due to different voltages which would generate heat and even could destroy them) so probably they need to be first time connected while fully discharged.
mengagumkan said:
I think I found the way of improving the battery of tablet as in the title. The battery compartment has dimentions 126.5x67.5x5 mm.
The original battery pack is wired and of capacity ca 1800 mAh so it does not last long.
I found on eBay batteries that will fit in the battery compartment, 3 of them, and they need to be connected in parallel. That will give 5400 mAh capacity at 3.7 V. Each battery has wires and has the size of 56x36x5 mm.
Here is the link:
http://www.ebay.com.au/itm/180850958176?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I ordered the batteries and will post further when i install and test this solution. My only concern is that the batteries connected in parallel need to have identical voltages at the moment of soldering them together (to avoid high currents between them due to different voltages which would generate heat and even could destroy them) so probably they need to be first time connected while fully discharged.
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So the question is?
@UP:
It isn't forum for questions only.
@OP:
The second concern might be charging and fuel gauge, try to find out what are those ICs in your tablet, get datasheets and check if they need to have batt characteristics programmed by CPU, you might need to change parameters passed to them.
I would be very careful modifying the batteries. Li-ions have control circuitry inside of them that talk to the device and they have a very specific way they must be charge.
Even when they're used normally they have a bad habit of blowing up.
xHausx said:
Li-ions have control circuitry inside of them that talk to the device and they have a very specific way they must be charge.
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Umm, if we're talking about cellphone's batteries. No they don't (at least not in phone models I've been studying). All I've seen in this class of batteries so far is +, - and thermistor pad (and sometimes NFC Antenna), everything else is calculated by fuel gauge and charging ICs, basing on the batt parameters they get from CPU and calibration data.
The thermistor should be monitored by the device, but afaik all li-ion batteries must have control circuitry to make sure they are charged correctly. Batteries with multiple cells also need it to balance usage and charging.
Of course there's always the exception, but li-ions are by their nature unstable, so caution is still advised when doing anything with them. A quick search of YouTube shows a lot about what they're capable of.
http://forum.xda-developers.com/showthread.php?t=906144
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries/
I'm looking for help finding a Power Bank Power Pack for my Samsung Galaxy S5. There are many products, but all work equally well?
No. There are a lot of cheap, generic brand ones from China, etc that have questionable specs and safety.
But brand name models should provide the correct voltage, not present a fire hazard and be of reasonable build quality. Leaving you with two variables.. battery capacity /life and price.
So I'd look for something well made - which you can infer from a brand name product or examine in detail. And then at the battery capacity and battery type. You'd want one of the better battery types e.g. Li-Ion, not lead acid, gel, nicad or niMH.
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This is a question for developers; I don't know enough as to how qc is implemented to know if it might be possible. Anyone DEVS know?
QC works by having additional power profiles([email protected], [email protected])
Your normal USB devices works only on 5V (at 500mA, 2.4A etc)
This means your devices needs the QC chip(to do handshaking) AND power-related hardware to accept 9V or 12V
There is a teardown that says the nexus 5X has a dormant QC chip... But dunno about power hardware(won't work witgout power hardware)
Odd. Why take the time/space/expense to put in a QC chip, but not the partner power hardware?.....hmmm
And by dormant, you mean it's currently unused?
Ask huawei? Maybe their reference boards have qc2.0, more of a pain to redesign and remove it
Example: some android watches don't have Bluetooth, but the soc usually bundles WiFi+BT together
And they didn't want to pay for the licensing rights (physical chip would be like $0.10/device, license would be like $1/device... Not actual figures)
Hello,,
Some users posted information that the new galaxy phones will not support the Quick Charge 3.0 but only 2.0 :crying:
I contacted Qualcomm and Samsung and they both weren't able to provide me whether a conformation or denial about it.
So what do you think for those who like this feature? Will the new phones support it or not? because to me a phone with 3600mah should really have the Quick Charge 3.0.
the manual on page 12 says 2.0
Qualcomm s820 soc supports quick charge 3.0. Is it possible they have not activated that feature? Sure I geuss. Also they are offering more than one soc depending on your location. So the s820 won't be the chip for everyone.
I am only going by what the manual says. If Samsung put that in the manual then that's what it is unless they made a mistake with it, and then they should be able to clarify
Tidbits said:
I am only going by what the manual says. If Samsung put that in the manual then that's what it is unless they made a mistake with it, and then they should be able to clarify
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It could be something that they will update or something in the kernel that can be modified by developers. I'm saying that the processor supports it. So it if they truly are only using version 2.0 it will most likely be enabled to 3.0 in the future.
If it does great. If it doesn't oh well.
There is a big chance that the new upcoming phones will support the QC 3.0 through an update.. the HTC A9 has a micro usb port and didn't support QC 3.0 until they release an update for it so I really hope Sammy will do that too for both of new phones!
wf-17 said:
Hello,,
Some users posted information that the new galaxy phones will not support the Quick Charge 3.0 but only 2.0 :crying:
I contacted Qualcomm and Samsung and they both weren't able to provide me whether a conformation or denial about it.
So what do you think for those who like this feature? Will the new phones support it or not? because to me a phone with 3600mah should really have the Quick Charge 3.0.
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agree with you! Quick charge 3.0 will be much better.
https://www.qualcomm.com/news/snapd...-galaxy-s7-and-s7-edge-powered-snapdragon-820
To ensure that you’re spending less time plugged into a socket and more time enjoying your mobile experience, the Samsung Galaxy S7 is outfitted with Qualcomm Quick Charge 2.0: It fuels your device up to 75 percent faster than conventional charging.
I saw this on gsm arena. Another website mentioned the 83 percent charging in 30 minutes. So not sure what to believe.
http://m.gsmarena.com/samsung_galaxy_s7-7821.php
It's Quick Charge 2.0 only in S7:
"[Samsung] told PC Advisor at MWC2016 that it thinks Quick Charge 2.0 is fast enough"
http://www.pcadvisor.co.uk/review/a...msung-galaxy-s6-vs-samsung-galaxy-s7-3635467/
So it doesn't have QC3.0 and it doesn't sound like Samsung is committed to enabling it. Is it on the table for custom Roms? I know the processor supports it but does the rest of the hardware? I just got my aukey QC3.0 wall charger in the mail and even though it's QC2.0 backwards compatible, it'd be nice to put it to use.
Here is a listing on the Qualcomm site which lists devices supporting their technologies. The S7 showed up under a search list for QC2.0 and had a page outlining its (mostly Snapdragon-based) technologies:
https://www.qualcomm.com/products/snapdragon/smartphones/samsung-galaxy-s7-edge
At the bottom there is a bullet item claiming QC2.0 for 75% faster charging than non-QC devices...
It's odd, most of the documentation of QC3.0 focuses on more efficiency, but they don't make any direct comparisons of speed. In fact, one article even clarified that QC3.0 has the same max power as QC2.0 and the same target power flow and what it added was fine grained control over voltage and that it may help the speed of charging on lower voltage devices. So, it's a mixed message as to how much benefit it might provide a cell phone, the 0-83% figure I've seen quoted is often "a device went from ..." meaning they could have chosen the device that was least suited to QC2 for their benchmark and that device would be the one that would benefit most from QC3.0. But, in the end, maybe QC3 really didn't offer much real-world charging performance for the S7? Still, the greater efficiency due to having better control over voltage might have been a nice change even if the total speed wasn't that much better.
flarbear said:
Here is a listing on the Qualcomm site which lists devices supporting their technologies. The S7 showed up under a search list for QC2.0 and had a page outlining its (mostly Snapdragon-based) technologies:
https://www.qualcomm.com/products/snapdragon/smartphones/samsung-galaxy-s7-edge
At the bottom there is a bullet item claiming QC2.0 for 75% faster charging than non-QC devices...
It's odd, most of the documentation of QC3.0 focuses on more efficiency, but they don't make any direct comparisons of speed. In fact, one article even clarified that QC3.0 has the same max power as QC2.0 and the same target power flow and what it added was fine grained control over voltage and that it may help the speed of charging on lower voltage devices. So, it's a mixed message as to how much benefit it might provide a cell phone, the 0-83% figure I've seen quoted is often "a device went from ..." meaning they could have chosen the device that was least suited to QC2 for their benchmark and that device would be the one that would benefit most from QC3.0. But, in the end, maybe QC3 really didn't offer much real-world charging performance for the S7? Still, the greater efficiency due to having better control over voltage might have been a nice change even if the total speed wasn't that much better.
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That is because QC3 doesn't improve the speed of charging at all. The only thing it does is make it more efficient.
markriveranig said:
That is because QC3 doesn't improve the speed of charging at all. The only thing it does is make it more efficient.
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Despite what I said in my previous post, which was mostly speculation based on the loose wording I'd seen in a number of documents from Qualcomm, there are still a number of articles that claim it is faster due to its efficiency, but not by a wide margin. For instance:
http://blog.blitzwolf.com/what-is-qc-3-fast-charging-with-blitzwolf-chargers.html
(Note that the QC3 battery is only at 70% vs 62% for QC2 and both are super-imposed over what looks like a smartphone graphic)
http://www.androidpolice.com/2015/0...8-more-power-efficient-than-quick-charge-2-0/
(same graphic, the title claims 27% faster, but the graphic only shows it being 8% ahead at the 29 minute mark)
If you listen to the video in the Android Police link they only ever compare charging speed to QC1 and conventional charging and the 38% claim vs QC2 is of efficiency. For example, from their press release:
Qualcomm said:
Quick Charge 3.0 is engineered to refuel devices up to four times faster than conventional charging. It is designed to charge twice as fast as Quick Charge 1.0 and to be 38 percent more efficient than Quick Charge 2.0.
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But, their video clearly shows that it is actually faster than QC2, it's just not 27% faster as claimed in the Android Police headline. Perhaps it might be 27% faster to 100% since the voltage step downs happen primarily at the tail end of the charge cycle and so the fine-grained voltage control will smooth that final charge level quite a bit. But getting a quick boost charge is not going to run into that since it can mainly happen at the maximum power where the existing fixed power levels of QC2 are close enough to optimal.
So maybe the video race shows what happens in real life when you aren't trying to get to 100%?
Does somebody knows which battery to buy for my pixel 4 model: G020N (as given in regulatory label in about phone). I found a few batterys on amazon but in their description the model is given as G020I-B. I'm wondering if they are compatible with my device or not. All of them are 2800 mah pixel 4 batteries.
Thank-you