Can anyone recommend a faster charger? The wall charger still takes upwards of 3-4 hours to charge, was hoping there was something that puts out some more power.
How many amps does the stock charger put out/how much can the phone 'handle'? (Sorry, I've never messed around with circuits and electronics like that, I'm not sure what the correct terms are)...
For example, http://www.amazon.com/Scosche-reVIVE-Dual-Charger-iPad/dp/B003N7NO4Q that car charger has a 2.1a socket, meant to charge the ipad, would that, in theory, charge the sgs2 quicker than a standard car charger, putting out ~1amp?
edit: realized this is better suited for the accessories forum, feel free to move.
I believe the wall charger is the fastest charger that we have available. I could be wrong, but I haven't found anything faster.
If you turn off your phone and throw it on the wall charger, it will charge faster as the phone is not on to use any battery... but thats probably not what you're looking for.
Your best bet would be to buy an extra battery and external charger and just swap the batteries when they are low. Thats what I do, and its much better than keeping your phone plugged in most of the day.
Our phone has an internally set 650 mA charge current limit - adding a beefier charger won't do anything.
It doesn't help that Samsung put in a crippled charger chip in our device with nonadjustable current, instead of using the more capable one already present in the MAX8997...
and even if the phone lets it charge faster, you really dont want a charger that charges too fast. I'm pretty sure that will murder the battery.
Thanks for the answers, all.
penguinlogik said:
Your best bet would be to buy an extra battery and external charger and just swap the batteries when they are low. Thats what I do, and its much better than keeping your phone plugged in most of the day.
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This is fine for "emergencies," but swapping batteries will throw off your battery stats.
Rrryan2 said:
This is fine for "emergencies," but swapping batteries will throw off your battery stats.
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How would swapping batteries thow off battery stats? It seems like everything resets once you boot up with the new battery, and isn't battery charge read off the raw voltage?
Lithium Ion batteries require a very particular two-step charging procedure. The battery has to be charged at constant current until the voltage rises to 4.2V, and then it needs to be charged at constant voltage (4.2V) until the charge current drops to about 10% of its starting value.
The amount of current allowed in the CC phase is a function of the battery's chemistry and capacity. It's expressed as some multiple or fraction of "C", the capacity of the battery. A 1C charge rate on a 1000mAh battery is 1A. The large LiPo batteries I use for my RC Heli and Airplane fleet will charge at 5C, for some of them this is better than 10A. But Li-Ion batteries usually can't tolerate more than 1C (and they usually charge at half that rate since this makes them last longer).
The harder you push the charge rate, the faster you wear out the battery and the more likely it is to fail. If you exceed the maximum charge rate, the battery is very likely to fail catastrophically (failure = fire). I charge my big LiPo batteries in a fireproof box for this reason.
My advice is, leave the phone's charging circuit alone unless you know what you're doing.
penguinlogik said:
How would swapping batteries thow off battery stats? It seems like everything resets once you boot up with the new battery, and isn't battery charge read off the raw voltage?
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Sure, it reads raw voltage. But the top end and bottom end worsen as the battery ages, and batterystats.bin doesn't know where those values are for a given battery until it's seen them. The system wasn't really designed to take into account the user swapping in multiple batteries.
Rrryan2 said:
Sure, it reads raw voltage. But the top end and bottom end worsen as the battery ages, and batterystats.bin doesn't know where those values are for a given battery until it's seen them. The system wasn't really designed to take into account the user swapping in multiple batteries.
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Huh... I'll let you know in a year how this battery swapping thing goes then. But wouldn't wear be the same on both batteries if I just swap them daily?
penguinlogik said:
Huh... I'll let you know in a year how this battery swapping thing goes then. But wouldn't wear be the same on both batteries if I just swap them daily?
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I did this with my captivate where I would swap batteries everyday. Much better than charging if you ask me.
Related
So I'm running my aria on CM7-07282011-Nightly. I'm having battery issues, not battery-life issues, but general battery function issues. My stock battery died, then I bought two identical 1500mah batteries, which I have been charging with a standard Li-ion smart charger which I normally use for battery packs I build for various other projects. I just charge one battery while I use the other battery. Anyways the problem is that my phone's battery meter will never go over 80%. I boot up on a fully charged battery, and after two or three minutes have passed(when it first boots up it just shows the % it was at when I took the other battery out), the phone reads something like 74%.
I've thought maybe there was just a problem using two different batteries, so I tried charging one of these batteries in the phone and of course they stop a little above 70%, and sometimes the battery even drains while plugged into, well, any, of my 4 AC wall-plug type chargers or my computer.
I've tried wiping the battery stats, but it didn't do anything, and all the calibration methods I see say to charge until it's at 100%, which I can't get to...
I just wish there was a way to plug in an externally charged battery and reset the battery meter and force it to recognize whatever value is actually 100%....I've searched these forums and googled for two days and found no solution.
Does anyone know how I can fix this??
Try fixing permissions
Sent from my Liberty using XDA App
I'm not sure if there is anything you can do about it. There's almost always going to be some quirks with third party batteries.
A tip is never get 3rd party batteries and the batteries we use love charging so charge whenever possible because if you let your battery die before charging waste builds up and leaves less space for charging.
Signatures are fancy.
well, the phone works as long as if the battery has been charged to 100%, so I just wondered if the was something I could do...
So even if the batteries work a long time when fully charged from my external charger, there is no way to fix the battery meter? If I continue using it normally would battery stats eventually callibrate? they are good batteries...just seems like a software problem to me
Where did you buy the batteries from, E-bay??? E-bay and other on-line markets are loaded with Chinese knock-off batteries & SD cards that are fakes and/or not to manufacturer spec products.
If that's what you have, you can't expect the phone to "fix" it.
Battery stats do take a few days to calibrate, but I believe it should still show 100% when charged, if you have a real battery and not something out of spec.
I don't know what the manufacturer specs are, but a fully charged battery reads 4.2v, well within standard Li-ion open-circuit values. There is nothing wrong with these batteries....
chaldeman1984 said:
I don't know what the manufacturer specs are, but a fully charged battery reads 4.2v, well within standard Li-ion open-circuit values. There is nothing wrong with these batteries....
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Problem is that the percent battery available is not determined my measuring the cell voltage, rather reading a value out of the fuel gauge built into the battery pack. Li-Ion batteries have a rather flat discharge profile then crater at the end, making the cell voltage an unreliable predictor/measure of battery capacity.
T
To get the best battery life, when should I charge my phone? When the phone almost runs out of juice, or whenever I can (below 80%) ? Please help!
Deep discharges are bad, but so is spending lots of time at maximum charge.
I'd consider charging around when you hit 80% if it's convenient, but if you're expecting to be on battery for a while soon, top off whenever you want.
Discharging to 5-15% is bad for your battery longterm.
So to get the best battery, I should charge when it is $80 right?
Sent from my SAMSUNG-SGH-I777 using XDA App
kvl19 said:
So to get the best battery, I should charge when it is $80 right?
Sent from my SAMSUNG-SGH-I777 using XDA App
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There's no hard fast rule about 'exactly' when you should recharge it. Simply try and keep the phone from running < 20% a lot and never keep it always charged at 100%. If you get in the habit of charging in the 30-80% range, that would be best.
Basically throw out the old mentality of always using it as much as possible before recharging as lithium batteries simply don't work like the old nicad batteries from years past.
This phone uses a Li-Ion battery, and these batteries do NOT have any kind of "memory." Charge it whenever you want to. However, it's not really good to always keep it "topped off." (Deep discharges are also not good.)
If you are going to store the battery, drop it to 75%-50% charged first.
There are some things to consider, however:
If the phone's power circuit bypasses the battery when the battery is fully charge (instead of constantly pulling power from the battery while the battery is recharging), then leaving the phone plugged in is better than constant charge/discharge cycles. Based on the fact that this phone will work properly with NO battery attached when plugged in, this is probably a true statement (but I can't know for sure.)
Second, the phone itself might like to see the battery charged/discharged once in a while to calibrate the battery monitoring circuitry. (You never calibrate a li-ion battery - only the circuitry that monitors the battery.)
Here's a link with some interesting information:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Take care
Gary
Got it. Thanks for all your information
A small note to add why you shouldn't 'keep' it above 80% (constant top offs and being left on the charger). In general when above 80% it's been found that lithium ion batteries have a 'higher state of activity'.
What that does to the battery is what it sounds like. Higher state of activity means higher wear and overall shorter lifespan.
That wear is easily seen in laptops. Many people have the habit of leaving them always plugged in while using and through the night, so they're always 'ready to go'. People who consistently do this to their laptops usually find after 1 year the battery life is noticeably shorter, 1 1/2 years 50% or so of 'new' capacity, and after 2 years looking at replacing the battery.
And I usually find a cheap deal on eBay for them, plus $50-75 for me. At least phone batteries are a bit cheaper.
Sent from my páhhōniē
Is it better to charge them separately?
From what I heard, the dock charges the Tablet. So if I charged with the two connected, the dock would charge, and it would in turn charge the Tablet...sounds kind of inefficient to me, and maybe even bad?
I usually charge my TF101 tablet from it's dock and have done so since September, perfectly fine and no negative impact on the battery. Just don't make a habbit of burning the batteries too low, like 1% before you charge.
My dock does drain a little faster after having gone through a bunch of heavy discharges but that's why I usually charge before I get to like 3% .
Spidey01 said:
I usually charge my TF101 tablet from it's dock and have done so since September, perfectly fine and no negative impact on the battery. Just don't make a habbit of burning the batteries too low, like 1% before you charge.
My dock does drain a little faster after having gone through a bunch of heavy discharges but that's why I usually charge before I get to like 3% .
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That's odd since it is recommended that you run the batteries down before charging them instead of putting it on the charger before it gets below 10%. Charging them without running the power down has a negative effect on the amount of charge it can hold.
That is not required anymore.The ideal charge level for these batteries is about 40%.
Charge cycles aren't a problem either so discharge is required once a month or even more.
These devices use LiPo and Co batteries.
For these, it is recommended NOT to fully let the battery discharge (unlike older batteries with memory effect).
It is however recommended to fully charge then fully discharge your battery ONCE when you first use it on order to calibrate the battery (ie: let the software learn what level means full and what level means empty)
Sent from my GT-I9100 using XDA App
eraursls1984 said:
That's odd since it is recommended that you run the batteries down before charging them instead of putting it on the charger before it gets below 10%. Charging them without running the power down has a negative effect on the amount of charge it can hold.
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You can check the link in my Sig. there is some info on recent batteries and calibration.
Yup, running it till it shuts off is mainly to calibrate the battery gauge. Most Lion batteries have auto shutoffs built into them to prevent discharging past the point of no return (which is why ebay batteries are so cheap, usually they lack this and other features, like temp sensors to kill the device before it melts)
As to charging both devices, i dont see how charging each together would harm anything aside from running more power through the dock might eventually wear it out? Honestly i dont think you have anything to worry about XD
But I can see the dock being discharged to zero so often. So far it has happened 4 times without me even knowing it since its often connected to the tablet. I wish there was a way to use the dock and disable the charging to the tablet.
Its better to have a few full discharge n full charge cycle for any new battery operated product to maximize the new battery capacity after a few cycles it will reach its peak capacity.
iceman127 said:
Its better to have a few full discharge n full charge cycle for any new battery operated product to maximize the new battery capacity after a few cycles it will reach its peak capacity.
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But I'm sure on many occasions just by the usage and nature of the dock that it will end up being drained to 0% quite often. I don't think my dock battery will survive too long -.-
Does leaving your Galaxy Note plugged in after it has reached 100% charged harm the battery?
From what I heard and read numerous times, you shouldn't leave a phone on a charger for more than 24 hours. I have heard many different opinions on this, but I think leaving a phone to charge overnight (6-10 hours average???) on a consistent base shouldn't harm the battery in general.
Is there "memory"?
Ceasare said:
Is there "memory"?
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Only in nickel cadmium batteries
I thought with Li-ion batteries its the number of total charges before it starts going bad?
ukic said:
I thought with Li-ion batteries its the number of total charges before it starts going bad?
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Yep. Same with all batteries.
Hard to say how many charge cycles the OEM batteries are rated for.
From Samsung sdi...
No Memory Effect
Lithium ion batteries have no memory effect, as seen in Ni-Cd and Ni-MH batteries, from which repeated charging and discharging reduces charging capacity to an insufficient level.
Long Life Cycle
Lithium ion batteries last through more than 500 repeated charges and discharges, making them very economical.
also from other readings...
I am pretty sure that Lithium-ion batteries for smartphones cannot be overcharged because the device's circuitry stops charging the moment it reaches 100% and allows it to drop a certain % till it recharges. That's why sometimes your phone's battery % will reduce so quickly after a full charge because it is really not at 100% when you unplug it.
Manufacturers, however, will still recommend disconnecting after a full charge.
Another...
it is not good to allow your Lithiumo-ion battery to fully drain then recharge repeatedly, as many suggest, to "train" your phone...that's puts a stress on the battery and is not good.
A low % (15-20%) then recharging to full one time will reset the meter and make it more accurate but not lengthen the batteries life.
all that said...I plug mine in at night and unplug in the morning.
This link talks about the Samsung battery and charging. It sounds educated on the issue but who knows....
http://www.geeksailor.com/how-to-improve-samsung-galaxy-note-battery-life/
Summary
1. Use wall charger not computer
2. Unplug when charged
3. Don't recharge until battery is below 10%
I put the phone on my desk dock every night whether it needs it or not. I do find myself topping it off too much also.
I've noticed many roms provide options to charge at a faster rate, many have by default now.
Just looking at CheckRom, I see that it states "(for AC: up to 1200mA, for USB: up to 900mA)". Is there any real downside to using these? Such as shortening battery life.
I have been wondering about this for awhile. Thanks.
I'm sure I read somewhere that it will only use the milliamp that is supported by the battery. Also if it charges faster it shouldn't be a problem since its using the correct power input
Sent from my GT-I9300 using xda premium
Faster charging equivalents more strain on the battery and thus a shorter life in terms of charge/discharge cycles.
Since the battery is replaceble, it may well be worth the few dollars to you to have it charge faster, but that's personal preference.
Quick-charging batteries leads to additional heat, I would thus not recommend it if you plan to leave it charging in a car in the summer
since that will cause even further strain. (It's very unlikely the battery could go in self-heat mode due to charging)
Actually NO, but charging with more than 1A which is stock/default will add more heat to your phone. Heat which is HOT not WARM will reduce battery life of rechargeable batteries.
Oh right, very neat. I plan to get one of those high capacity batteries (tad over twice of original) for $15.
Does anyone know if it can also reduce battery life leaving it on charge all night? I think it discontinues charging.
krisando said:
Oh right, very neat. I plan to get one of those high capacity batteries (tad over twice of original) for $15.
Does anyone know if it can also reduce battery life leaving it on charge all night? I think it discontinues charging.
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As every one said charging at higher rate will reduce battery life and also reduce back up time.
Secondly, leaving charger ON all night will not effect battery, because charging is cut off by internal circuit once battery is fully charged.