Help on note 2 smart dock

[TheOtherBill]

it's been scientifically proven by dozens of groups and universities over the years. It's like ok, I get it, you don't care and it doesn't phase you. But don't dismiss it as "incorrect."

Not incorrect, but rapidly becoming obsolete. It was totally true just a year or two ago - and for many years before that - but the latest tech doesn't have those limitations (except heat beyond specs, that's always a problem).

 

[DaRkL3AD3R]

Not incorrect, but rapidly becoming obsolete. It was totally true just a year or two ago - and for many years before that - but the latest tech doesn't have those limitations (except heat beyond specs, that's always a problem).

Can you back that up? The cell is still Lithium Ion which hasn't changed much. And maintaining a high voltage (4.2v aka 100% capacity) has been shown to cause significant damage to the long term capacity of the cells.

I'm not sure what the problem is here?

 

[TheOtherBill]

The latest generation of smart chargers don't appear to maintain full voltage once the battery is fully charged. The older analog and digital chargers did. I can only go by the manufacturer recommendations, but it seems like a fairly obvious solution - although they keep the schematics and algorithms proprietary, probably because they invested quite a bit to fine tune them.

Think about how easy* it would be to do: You wait till the current to the battery drops to a certain level. At that point you know the battery is charged. Wait x period of time and peek at the voltage. Pulse with y volts for z time if it's not ideal. Wait then recheck continuously as long as external power is available. If the battery is fully charged and the drain is very low you could be applying power to it for as little as a few seconds an hour.

*easy in theory. The ideal x,y,and z and voltages used can get very complex, they would probably have to compensate for drain, and both battery and external temperatures, plus determine the best pulse duration and frequency.

Am I positive this is the way it's done? No. But this is just one way of doing it. They are doing something that allows them to no longer say "for best battery life, remove the device from the charger as soon as it is fully charged". This is different from older devices.

BTW and along the same lines: I suspect you cannot fully discharge the battery in your Note 2 since the manual states that the phone will shut itself off once voltage becomes too low.

 

[DaRkL3AD3R]

The latest generation of smart chargers don't appear to maintain full voltage once the battery is fully charged. The older analog and digital chargers did. I can only go by the manufacturer recommendations, but it seems like a fairly obvious solution - although they keep the schematics and algorithms proprietary, probably because they invested quite a bit to fine tune them.

Think about how easy* it would be to do: You wait till the current to the battery drops to a certain level. At that point you know the battery is charged. Wait x period of time and peek at the voltage. Pulse with y volts for z time if it's not ideal. Wait then recheck continuously as long as external power is available. If the battery is fully charged and the drain is very low you could be applying power to it for as little as a few seconds an hour.

*easy in theory. The ideal x,y,and z and voltages used can get very complex, they would probably have to compensate for drain, and both battery and external temperatures, plus determine the best pulse duration and frequency.

Am I positive this is the way it's done? No. But this is just one way of doing it. They are doing something that allows them to no longer say "for best battery life, remove the device from the charger as soon as it is fully charged". This is different from older devices.

BTW and along the same lines: I suspect you cannot fully discharge the battery in your Note 2 since the manual states that the phone will shut itself off once voltage becomes too low.

Well, have correct. You can fully discharge the battery but it would take some really fail ownership to pull it off. The circuits cut off the device from draining anymore of the battery once it reaches a certain minimum threshold however failure to recharge the battery within a reasonable length of time could mean total discharge. You probably know about that though. That any one of these smart batteries could reach a point in depletion where they cannot sustain the internal circuitry that governs the cells interaction with the device.

Either way, I agree with you guys that in the big picture it doesn't hurt since these phones/batteries will be replaced. I just want to raise awareness that it is a valid concern. Keeping a Li-Ion battery at max charge (see: voltage) will cause irreversible damage.

Let's be done with that agreed?

I believe tetaganda now has all the information they need (and then some lol) to be satisfied here.