Speaking of Wow, that's so ignorant I can't NOT write something on this BS. Li-ion and LiPo batteries DO NOT have anything like a 'memory' affect and they DO NOT have to be cycled to get max out of them. Holy Moly. As an engineer and a long time Remote Control airplane hobbiest with lots of Lithium based batterys powering all kinds of things and expensive chargers to do the job I just can't let that BS go unchecked.
Here's a layman's guide:
HowStuffWorks "How Lithium-ion Batteries Work"
Ok I guess
"memory" as far as a layman goes was incorrect.
Lithium batteries have a "Battery fuel gauge"
The "Battery Management System" (BMS)
"The BMS assures safety, long life and provides state-of-charge (SoC)."
"The accuracy of the SoC is good enough for consumer products and it decreases with use and time."
"The challenge of the so-called
“smart battery” is keeping the electrochemical battery and the digital battery together. The electrochemical battery is known as the actual energy storage vessel and the digital battery is the circuitry that predicts the remaining energy."
"All batteries have losses and the released energy is always less than what has been fed into the pack. Inefficiencies in charge acceptance, especially towards the end of charge, resistive losses that turn into heat, and storage losses in the form of self-discharge reduce deliverable energy. A common flaw with BMS design is assuming that the battery will always stays young and energetic.
Aging takes on many dimensions and some BMS compensate by observing user pattern and environmental conditions to derive a “learn” algorithm that is meant to correct the tracking error. Such modelling helps but there are limitations because battery aging cannot always be tracked accurately."
"
Calibration, also known as capacity re-learning, is a better method to correct the tracking error of a smart battery. Manual calibration occurs by running the battery down on purpose. This can be done in the equipment or externally with a battery analyzer. With most fuel gauge chips, a full discharge resets the discharge flag and the subsequent recharge sets the charge flag. Establishing these two flags allows SoC calculation by tracking the distance between the flags."
Ok now this is where I said once a month because I rounded down from 40 to 30 to just keep it simple assuming you stick the phone on a charger or connect it to a computer once a day.
"The calibration of a device in constant use should be done once every three months
or after 40 partial cycles. If the device applies a periodic deep discharge on its own accord, no additional calibration is required."
Improving BMS
"When designing a BMS, one also must consider how the battery serves the host. In an iPhone and most EVs, for example, the battery is “married” to the host. This enables collecting data for learning. The battery and device co-habitat in a similar way to partners in a good marriage. Batteries for two-way radio,"
(or a cellphone)"on the other hand, are picked from a common charger and returned to a pool for recharging after use. Learning is difficult and a different method must be used to track battery health."
I personally use Gauge battery widget https://play.google.com/store/apps/...5odWJhbGVrLmFuZHJvaWQuZ2F1Z2ViYXR0d2lkZ2V0Il0.
and
Battery Booster https://play.google.com/store/apps/...wsMSwxLDEsImltb2JsaWZlLmJhdHRlcnlib29zdGVyIl0.
You can read the full article here
How to Improve the Battery Fuel Gauge - Battery University
Source
Research is performed by the Center for Automotive Research at the Ohio State University in collaboration with Oak Ridge National Laboratory and the National Institute of Standards Technology.
Simple Guidelines for Charging Lithium-based Batteries
A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger.
Charge at a moderate temperature.
(I am going to use a 5v 1A charger to keep temperature down, instead of the 5v 2A charger that came with the Note 2)
Do not charge below freezing.
Lithium-ion does not need to be fully charged; a partial charge is better.
Chargers use different methods for “ready” indication. The light signal may not always indicate a full charge.
Discontinue using charger and/or battery if the battery gets excessively warm.
Before prolonged storage, apply some charge to bring the pack to about half charge.
Over-discharged batteries can be “boosted” to life again. Discard pack if the voltage does not rise to a normal level within a minute while on boost.
A guide to how to prolong battery life
How to Prolong Lithium-based Batteries - Battery University
Priming a new Battery
"Rechargeable batteries may not deliver their full rated capacity when new and will require formatting. While this applies to most battery systems, manufacturers of lithium-ion batteries disagree. They say that Li-ion is ready at birth and does not need priming.
Although this may be true, users have reported some capacity gains by cycling these batteries after long storage." (or after say continuous usage)
" However, a full discharge/charge will reset the digital circuit of a 'smart' battery to improve the state-of-charge estimation."
Onto another source for redundancy as I do not particularly like being called ignorant. I prefer less accurate if you must but hopefully this thorough post should clear up any short comings unlike your lack of vocabulary and name calling.
Priming Li-Ion Batteries
"The predominant statement you will find is that new Li-Ion batteries do not require priming.
Nevertheless, you should fully charge your Li-Ion battery before using it for the first time."
Cycling Li-Ion Batteries
"Li-Ion batteries have a lifetime of 300 to 500 full charging cycles or up to 2000 partial cycles. There are reports that cycling a Li-Ion battery after long storage periods, i.e. fully discharging and re-charging it for two or three cycles, leads to to capacity gains. Other sources
recommend cycling Li-Ion batteries every couple of weeks." ( or you know I go with lets say once a month) "Generally, you should not fully discharge your Li-Ion battery."
Caring For Your Li-Ion Battery
"While Li-Ion batteries do not have a memory effect and don’t need to be primed or cycled to maintain full capacity, their lifetime can still be shortened dramatically, if not cared for right. Two things can damage Li-Ion batteries: deep discharges and heat. All of the following battery DOs and DON’Ts are derived from these two major factors."
Li-Ion Battery DOs
partially discharge and recharge (no memory effect).
charge at lower voltage.
take out battery when laptop is running with AC power connected
store battery in refrigerator with a 40-50% charge
cycle the battery every few weeks or after every 30 partial charges. (or you know for a cellphones lets say once a month)
Li-Ion Battery DON’Ts
deep discharge battery
trickle charge (Leaving the device plugged in as the charger will top off the battery over time)
ultra-fast charge. (Even though the Samsung Note 2 came with a 2A charger I am going to keep using my old HTC 1A charger for a slower charge, this will also help keep down heat, one of the major issues with damaging a lithium battery)
leave fully charged battery in laptop while running on AC power (heat damage)
freeze battery
buy old Li-Ion or spare batteries (Li-Ion batteries age)
Source
How To Increase The Lifetime Of Your Laptop Battery
"Although lithium-ion is
memory-free in terms of performance deterioration, engineers often refer to
"digital memory" on batteries with
fuel gauges. Repeat small discharges with subsequent charges do not allow the calibration needed to track the chemical battery with the fuel gauge.
A deliberate full discharge with recharge every 30 charges,
(or you know lets say a once a month) or so, will correct this problem. Letting the battery run down in the equipment to the cut-off point will do this. If not done, the fuel gauge becomes increasingly less accurate."
Source
Getting the most of your batteries
How to Refurbish Lithium-Ion Batteries
1.
Allow the battery's power to run out. This can be done by installing the battery in a device and keeping the device on until the battery energy expires. Lithium-ion batteries are commonly used in handheld or portable devices such as laptops or gaming systems.
They are unique because they function better after a full discharge rather than a partial one. This is because
most lithium-ion batteries contain fuel gauges that create a sort of
digital recording of the battery's charge state.
Full discharges will effectively provide a re-synchronization of the battery's current charge state with the fuel gauge level. This will help to reduce any added load to the circuitry in the battery.
2. Place the battery in a battery charger.
Let the battery charge to its full power capacity. Once the battery is fully charged remove it from the charger.
3. Place the battery in the device.
This process will cause the battery's fuel gauge to synchronize with the battery's current charge state and helps to maintain functional capacity. An important tip to maintain longevity of the battery is to keep it in a cool location because elevated temperatures can damage the circuitry. Also when storing the battery it is best to do so when the battery still has some partial charge remaining.
To maintain proper fuel gauge calibration it is recommended to do a full discharge after at least 30 charges. (You know or
Once a Month)
Source
Read more: How to Refurbish Lithium-Ion Batteries | eHow.com
http://www.ehow.com/how_7593284_refurbish-lithiumion-batteries.html#ixzz2BNm5UTse
Speaking of Wow, that's so ignorant I can't NOT write something on this BS.
Not sure where you got your "Engineering" degree from but you must have flunked English. I am not even going to comment on you inability to form a complete sentence. Never mind your double negatives.
So there you go if you want to call that BS and me ignorant I think you need to do more research before running off at the mouth with your one source. And yes its obvious you are just a layman. So you can stick to your layman sources.
I have had my G2 for over 2 years well over 1000 cycles and its still going strong. Matter of fact my HTC 8525 still holds a decent charge as I took it out and messed with it the other day. My Sensation has no issues at all either. This maybe my opinion, and I may have misspoke as far as exact terms go. How ever I do not resort to name calling and using vocabulary like "BS" to literate my point. I just state facts and opinions if you do not want to listen to them that's fine but no need for childish behavior. This isn't 4chan or youtube this is a discussion forum.
Oh and since your some sort of "engineer" here is some more light reading you know if you are capable of comprehending it, with your vast knowledge of the subject and oh so obvious "R/C enthusiast"
http://www.batteryeducation.com/2008/08/digital-memory.html
"Although lithium-ion is
memory-free in terms of performance deterioration,
engineers often refer to
"digital memory" on batteries with
fuel gauges.