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Old December 1st, 2009, 11:37 AM   #141 (permalink)
jltung
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Good thread, I think you are on to something.

Battery Life
Battery Life is a major problem for a lot of people. I think it comes in 4 different packages:

1: Battery : Do you drain the battery to zero or never let it drain down

completely ? I do not know the definitive answer. It depends

on who you believe and personal experience. I have not tried to

drain the battery yet.

2. Charger : Many people who have bought after market chargers have had

interesting experiences from auto phone calls and emails made in

sleep time to discharging while plugged in etc. I have several

after market chargers, some work and some do not.

3. Killer Apps : I believe they are helpful although they also drain battery.

Some people feel that the LINUX system auto shuts down

unused programs. I am not sure.

I think TasKiller and Adv Task Killer work but use more battery.

I personally use Adv Task Manager and find it works well for me

4. Usage : Of course the biggest drain is usage. Any battery no matter how

good will drain with heavy usage. i.e. game playing, listening to

music, gps, bluetooth, wifi etc. The main drain is how long is the

screen on.

Conclusions: 1. Battery: defective ? Replace. Drain or not drain ???

2. Charger: defective ? Dispose

3. Killer apps: Do you need them ? I like Adv Task Management

4. Usage: Review usage in Settings/ App - Spare Parts

Modify especially in areas of low coverage. A lot of

the programs kick in automatically and if your

coverage is not good it continues to search and

uses battery. That is what the Killer apps do.

Let me know if there other thoughts on the matter.



Originally Posted by sooper_droid12
Lithium ion batteries should never be allowed to discharge or reach a low level of charge and then fully charged (i.e. full cycle charges). A friend of mine has his mind set on the fact that you need to fully discharge a battery and charge it to full to maintain its longevity. The opposite though is true: 1) Each battery has a finite number of charge/discharge cycles so no matter what, every batterywill eventually decline and die (i.e. these batteries do not have memory); 2) Several partial discharges with frequent recharges are favorable over one deep one; 3) Since our batteries are being measured by a gauge, 1 full discharge in 30 will keep the battery's circuitry calibrated with the gauge.

These are just some tips. Again, no battery is going to last forever and typical life for Li-ion batteries are 2-3 years. And don't bother getting a spare battery, unless you're one of those users who just blasts through batteries.
Agreed, I always have people telling me to discharge fully, don't overcharge, etc... and I always have to go on with this story.

The batteries that benefit from this type of charging and discharging are NiCd and NiMH cells; which were once very popular until lithium-ion technology came along. Lithium-ion does not have this "memory" effect and does not benefit from fully discharging, conversely, it looses capacity in these discharges.

Lithium-ion (or lithium-ion polymer) degrades based on the amount of "charging cycles" that it undergoes; each full charge (0->100%) counts as one full cycle. So, as sooper said partial discharges are more favorable over full discharges as they only count as a fraction of a full charge cycle.

As for the charging overnight, modern charges, phones, and batteries all include circuitry to prevent thebattery from being overcharged. You should be fine leaving it plugged in overnight.
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