What will happened in my battery in overnight charging?
It will likely get fully charged. Otherwise, nothing.
It will likely get fully charged. Otherwise, nothing.
Some people say it'll damage the battery if you charge/plug it overnight but I've been doing the same thing for all of the iPhones I've had since the first iPhone to the latest model of iPhone I have now and it works just fine. Although overuse of the iPhone while charging, as in if you were playing a game for a long period of time while it's charging, it'll slightly overheat and you would feel the increased heat.. This happens to mine but doesn't affect the phone's function.
Hope this helps.
"Some people say it'll damage the battery if you charge/plug it overnight."
That is pure hogwash. Once the battery is fully charged the charger shuts off automatically. You cannot overcharge the battery. Because the batteries are Li-Poly the do not have a "memory effect," so frequent charging and discharging does not affect the battery life adversely beyond the "normal" decline.
Charging to 100% stress the battery, but will not damage it. That happens to all Lithium batteries of all technologies. Charging up to 70% will increase the battery life 3~4 time, 80% double the life.
So, overnight charging will always reach 100% reducing the battery life to 300~400 charges, which is the normal expected life.
Another problem is that the radio circuit of IPhone 4 is connected direct to the battery, so even reaching 100% IPhone will discharge the battery and the charger will complete the amount discharged. That will repeat several time during the night reducing the battery life.
Some says that after completing the charge IPhone use only the AC/DC adapter. this is not correct, just look at the schematics you will see have the real information. Most that say the opposite is just guessing or read from someone guessing, not looked the circuit.
Anyway, 300~400 will give you 2~3 years of normal use.
But if you are a heavy user, it may be worth to charge up to 70~80%.
Sergio
Utter hogwash.
It is full charge cycles that count.
If you charge the battery say from 10% to 80% every day and only once a day, you will reach a full charge cycle every day and a half or so. The full change cycle will be reached the next day when the battery level reaches 40%. 70% charge from the previous day plus another 30% charge the next day is one full charge cycle.
Battery life is not linear
Laboratory data of Li-polymer batteries, charging and discharging until they loose 20% of their nominal capacity.
4.3V - 110% charge, battery life 150~250 cycles.
4.2V - 100% charge, battery life 300~500 cycles
4.1V - 90% charge, battery life 600~ 900 cycles.
4.0V - 70% charge, battery life 1200~ 2000 cycles.
3.92V - 50% charge, battery live 2000~4000 cycles.
So for example, if you charge 50% the battery will last ~ 3000 cycles. 100% will last ~ 400 cycles.
New Samsung notebooks are rated to 1500 charges, they charge the batteries up to 80%. To compensate the loss of 20% of capacity they increased from 6 to 8 cells.
Similar happens with satellites where the battery life is more important than capacity as they cannot replace than, so they are not charged fully.
If anyone has any doubt about Iphone continues to use the battery after its complete 100% charging with AC/DC adapter connected, look into RF power regulator MAX8839l. This devices send the regulated power supply to 3G power amplifiers and the only power supply it uses is the Battery. So it keep discharging the battery even with AC/DC connected and battery fully charged.
As I mentioned this extended battery feature, charging up to 80%, is already implemented in Samsung notebooks, they call it PowerPlus.
Charging at 100 give the best use of battery capacity, but not battery life.
Below copy of their website (By the way, I don't have any Samsung products)
"Keep Your Battery Going with PowerPlus
PowerPlus is a technology offered on Samsung notebooks designed to let you discharge and recharge your laptop battery up to 1,000 times. That’s better than three times the longevity of a standard laptop battery, which typically wears out after 300 cycles and three years of daily use.
Most battery damage occurs when the cells inside are at or near capacity. That’s because batteries get a bit hot under the collar when they max out their charge at 100 percent. This heat causes the delicate structures within to start to break down, which ultimately makes the battery less capable of holding a charge. Eventually capacity drops to the point where the battery won’t hold a charge at all and it has to be replaced.
PowerPlus works to avoid this problem by keeping your battery properly conditioned, thanks to a set of technologies that helps prevent this kind of damage to the delicate electronics inside.
Battery Life Extender
One of the key features of PowerPlus is a simple setting you’ll find on your Samsung laptop called Battery Life Extender. You’ll find Battery Life Extender under the Samsung folder, inside “All Programs” in your Start menu. Here you’ll find the option to either leave your battery in Normal mode (which lets the battery charge to 100 percent of its capacity) or engage the Battery Life Extender mode, which caps the charge at 80 percent.
Battery Life Extender helps keep the battery from overcharging and overheating, which protects it from being damaged. The result is a battery that keeps on going for years. And of course, it’s an option you can turn off or on at any time. If you find you need a little extra juice for a long flight, the setting can always be returned to Normal mode, giving you full access to 100 percent of the battery’s capacity."
It's pretty clear that:
A: You don't know what you are talking about
B: You probably don't have an iPhone
So what are you doing here, other than trolling?
All cellular manufactures, as far as I know, including Samsung, Apple, etc design their cellular charging system to get the maximum capacity of their batteries charging them to 100% of battery capacity but not to have the best battery longevity, it is a trade off. Based on this premises their recommendations are right, the batteries will last 2~4 years.
But if you are specially interested on battery longevity as car makers of electrical cars or Satelite with battery rated to more than 10 years longevity, you can use this information provided.
As you asked.
A) I Know what I am talking about. I am an Electronic Engineer, 25 years experience on design and managing Wireless design Engineers specially cellular phones.
B) Yes I have Iphone 4S, Two Mac Air, IPAD2 64 3G and IPAD3 WiFi.
Probably the message I post are not for you guys, need to have some background.
Here some
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batterie s
Overnight charging can affect in the iphone 4s battery
