Lithium ion batteries hate heat. Since it tends to get a bit hot while charging, and I don't care how long it takes to charge, I have reduced the AC charging current to 450mA like a USB socket. Can anyone think of any negative effects this might produce?
Takes longer to charge, otherwise no.
But honestly, the little heat it produces when charging probably doesn't matter in your phone's useful life.
jzmtl said:
Takes longer to charge, otherwise no.
But honestly, the little heat it produces when charging probably doesn't matter in your phone's useful life.
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If I'm not using it I agree, but if I happen to be using the phone while plugged in it gets plenty hot. Much more so than normal use (I have extreme CPU and GPU undervolt).
i charge my 2 batteries with a wall charger, it charges at 4.2v, 350mAh, it takes like 6hours to complete
i dont do this because of your question but it is much simpler swaping, then charging via usb,i get better cycles like this, swap every morning.
Related
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.
Hello,
my Galaxy S II is charging extremely slowly. It takes about 2-3 hours to fully charge.
I underclocked it when its charging with setcpu but it still needs so much time.
My Iphone 3gs charged much faster...
Is there any other option to increase the charging speed?
Search would have saved this post .
SGS2 standard charge time 3 hours .
jje
Don't screw with it. Li-ion battery needs a certain charging algorithm and too much current can blow it up.
jannism said:
Hello,
my Galaxy S II is charging extremely slowly. It takes about 2-3 hours to fully charge.
I underclocked it when its charging with setcpu but it still needs so much time.
My Iphone 3gs charged much faster...
Is there any other option to increase the charging speed?
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I think this is normal for our devices, sir. Mine takes that long too and it would take longer (more than 5 hours, I think) if only via my PC's USB port. But don't worry about it. The longer it takes for you to recharge your phone means the lower the power that goes into your battery. With that, the longer your battery will last.
I don't recall the exact specs of the S2's charger. I think it outputs 1amp (or lower). If I want to quickly charge my phone, I plug it into my HP TouchPad's charger which outputs 2amps. I may be shortening my battery's lifespan, but I'm not too concerned. I have an additional spare battery and I'll probably end up replacing the phone in another few months anyway.
ohyeahar said:
I don't recall the exact specs of the S2's charger. I think it outputs 1amp (or lower). If I want to quickly charge my phone, I plug it into my HP TouchPad's charger which outputs 2amps. I may be shortening my battery's lifespan, but I'm not too concerned. I have an additional spare battery and I'll probably end up replacing the phone in another few months anyway.
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What s/he said. ^ Stock battery is around 1600mah. A charge current of 1.6Amps is the most I would go for personally. This should complete the job in around 1hr from completely flat.
jannism said:
Hello,
my Galaxy S II is charging extremely slowly. It takes about 2-3 hours to fully charge.
I underclocked it when its charging with setcpu but it still needs so much time.
My Iphone 3gs charged much faster...
Is there any other option to increase the charging speed?
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Yes:Switch the phone off. Or if you need it on for calls, then switch off the wifi etc.
Better to keep it charging via USB when you are using your pc/laptop if not using it.
Best of all buy an extended battery, then you have no worries...
ohyeahar said:
I don't recall the exact specs of the S2's charger. I think it outputs 1amp (or lower). If I want to quickly charge my phone, I plug it into my HP TouchPad's charger which outputs 2amps. I may be shortening my battery's lifespan, but I'm not too concerned. I have an additional spare battery and I'll probably end up replacing the phone in another few months anyway.
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Doing this achieves nothing. Your phone does not draw more than 650mA.
oinkylicious said:
Doing this achieves nothing. Your phone does not draw more than 650mA.
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I stand corrected. Indeed the phone never draws the full 2amps.
oinkylicious said:
Doing this achieves nothing. Your phone does not draw more than 650mA.
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so changing the charging current in the voltage control app does nothing anyway?
kyle51 said:
so changing the charging current in the voltage control app does nothing anyway?
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Correct, purely placebo. Though it would allow you to change USB/MISC charging to 650mA.
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.
Is it me or does the battery have a longer life when it charges slow?
Sent from my LG-H901 using XDA-Developers Legacy app
All that is different with the fast charge over the other methods is the amperage increases. As soon as the cable is unplugged all that matters is how charged the battery is. That being said, if you mean longer life overall over the lifespan then yes, slower charging will allow it to survive longer. However that is negligible as modern battery technology has improved a lot lately and this is less of a factor. Overcharging is a problem though and that absolutely will kill it sooner than it should.
mdl054 said:
All that is different with the fast charge over the other methods is the amperage increases. As soon as the cable is unplugged all that matters is how charged the battery is. That being said, if you mean longer life overall over the lifespan then yes, slower charging will allow it to survive longer. However that is negligible as modern battery technology has improved a lot lately and this is less of a factor. Overcharging is a problem though and that absolutely will kill it sooner than it should.
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I believe, and I may be mixing up chargers, that with fast charge it uses 9V DC instead of 5 V DC and an amperage change. Since you're effectively shoving the charge back in ( E over I * R) that *could* wear the physical elements over time. But I don't know that any of us are battery engineers, so we rely on intelectual guesses and 'who cares'. Bedside that, I suppose intellectually, slow charge would be a more through option, although, again a negligible difference.
Hi
Just bought a GT Neo 2 but didn't get the Realme 65W charger. I do have a Samsung EP-'T4510 USB-C Quick Charger 45W + USB-C Cable.
It's obviously not going to charge the phone as fast as an original 65W charger does but it's not charging as fast as I'd expect. Plugged it in earlier at 49% and it was at 91% 40 minutes later.
So what affects charging time?
Charging set up as follows:
1) Using extension lead
2) Using adapter to convert 2 pin EU charger to UK 3 pin
3) Samsung T4510 (45W) and the cable that came with the T4510
Do the extension lead or adapter affect charging time? Also does the cable affect it? Do fast chargers have to be used with a specific type of cable?
The charger/cable has to support the charging protocol of the phone or it will only slow charge.
Best to use a OEM brick/cable no longer than 3 feet.
Battery temperature needs to be high enough at beginning of the charging cycle for fast charging to engage. Minimum 72F, but 82-90F is best.
Fast charging may engage below 72F but Li plating becomes likely. Below about 55F fast charging will likely be disabled.
Above about 103F or about 80% capacity fast charging with be ramped down or disabled.
If screen is on, fast charging is disabled.
A battery fault will also disable it or cause erratic fast charging ie a battery failure.
blackhawk said:
The charger/cable has to support the charging protocol of the phone or it will only slow charge.
Best to use a OEM brick/cable no longer than 3 feet.
Battery temperature needs to be high enough at beginning of the charging cycle for fast charging to engage. Minimum 72F, but 82-90F is best.
Fast charging may engage below 72F but Li plating becomes likely. Below about 55F fast charging will likely be disabled.
Above about 103F or about 80% capacity fast charging with be ramped down or disabled.
If screen is on, fast charging is disabled.
A battery fault will also disable it or cause erratic fast charging ie a battery failure.
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Thanks for that.
G1032 said:
Thanks for that.
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Sorry @blackhawk
One more question if you don't mind. Will charging the GT Neo 2 with the Samsung charger damage or reduce the lifespan of the Realme battery?
G1032 said:
Sorry @blackhawk
One more question if you don't mind. Will charging the GT Neo 2 with the Samsung charger damage or reduce the lifespan of the Realme battery?
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Fast charging produces more heat therefore will reduce the lifespan somewhat.
On my heavily used Note 10+ I now replace the battery every year or so to help prevent a battery failure, routine maintenance.
The charging curve is controlled by the phone not the charger. The charging curve should be near identical if both bricks supple the required peak voltage/amps and the phone power controller can communicate with the brick.
Thank you kindly. Much appreciated.
G1032 said:
Thank you kindly. Much appreciated.
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You're welcome. Play with it to see how it works.
Start the charge at about the same temperature then time how long it takes to gain 1 or 2% without turning on the main display. Watch when it ramps down during the charge cycle. It will vary but I see 2%@minute sometimes a little faster at the peak fast charging rate on the N10+.
To extent battery life limit discharge to 30% and top charge to 80%. Li's like frequent midrange power cycling; it extents their totals full charge cycles many fold. A 40-67% usage range is near ideal. Limit the current draw; higher current usage stresses the battery more as does back to back discharge/recharge etc cycles with no rest period.
That's one reason it's just easier to replace the battery. When an Li reaches 80% of its original capacity it's considered degraded and has reached the end of its useful service life. It should be replaced. Degraded Li's are more likely to fail which can seriously damage the device.
Any battery swelling is a failure, replace immediately.
blackhawk said:
You're welcome. Play with it to see how it works.
Start the charge at about the same temperature then time how long it takes to gain 1 or 2% without turning on the main display. Watch when it ramps down during the charge cycle. It will vary but I see 2%@minute sometimes a little faster at the peak fast charging rate on the N10+.
To extent battery life limit discharge to 30% and top charge to 80%. Li's like frequent midrange power cycling; it extents their totals full charge cycles many fold. A 40-67% usage range is near ideal. Limit the current draw; higher current usage stresses the battery more as does back to back discharge/recharge etc cycles with no rest period.
That's one reason it's just easier to replace the battery. When an Li reaches 80% of its original capacity it's considered degraded and has reached the end of its useful service life. It should be replaced. Degraded Li's are more likely to fail which can seriously damage the device.
Any battery swelling is a failure, replace immediately.
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That's all very interesting. I have often read about the 30 - 80 range. I used to own a Huawei P9 and always charged to 100 and that battery didn't last more than 2 years. Last phone was an A70 and that'll be 3 years old in June. Started getting random reboots recently and a quick Google said that's most likely down to the beginning of a battery failure. So just got this GT Neo "as new". It was obviously sent back to the online store by original purchaser minus the charger (replaced with a 5V 2.1A charger. Store had no OEM charger listed on site for sale so I agreed to take a the EP-T4510 charger. While it's not ideal that I won't be getting the fast charge of the OEM charger, it's far from a major issue for me, as long as I'm not going to damage the battery with it and I doubt I will. Even less of an issue if all I really need to do is keep it between 30 and 80.
I've read also that a complete discharge every once in a while is recommended but not sure how accurate that advice is.
G1032 said:
That's all very interesting. I have often read about the 30 - 80 range. I used to own a Huawei P9 and always charged to 100 and that battery didn't last more than 2 years. Last phone was an A70 and that'll be 3 years old in June. Started getting random reboots recently and a quick Google said that's most likely down to the beginning of a battery failure. So just got this GT Neo "as new". It was obviously sent back to the online store by original purchaser minus the charger (replaced with a 5V 2.1A charger. Store had no OEM charger listed on site for sale so I agreed to take a the EP-T4510 charger. While it's not ideal that I won't be getting the fast charge of the OEM charger, it's far from a major issue for me, as long as I'm not going to damage the battery with it and I doubt I will. Even less of an issue if all I really need to do is keep it between 30 and 80.
I've read also that a complete discharge every once in a while is recommended but not sure how accurate that advice is.
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Li's are born to die; they start degrading the moment they're assembled. Don't go too nuts, just replace them as needed.
Until I watched someone replace my N10+ battery I was very concerned. However I realized it's relatively easy with the right skillset and tools.
Mind you they say the N10+ is one of the more difficult ones to replace... meh.
Now I don't really think much about it.