Battery discharge - okay to discharge to 0%?

On page 3-15 of the 570RU user manual, it gives instructions to discharge your battery to 0%.

But I just read the " Notebook Battery Guide," and chrisyano says, "Never discharge your battery to 0% – as this can render your battery useless." He goes on to say, "Calibrate your battery’s fuel gauge by doing a full discharge every 30 cycles. Run the battery to the cut-off point in your notebook to keep the battery’s fuel gauge accurate."

So chrisyano recommends discharging the battery to some point above 0% every 30 cycles, but never to 0%.

What's your take on this?

 

Hi.

your battery will never get to 0%, you laptop will switch off before it gets to approx 5%.

regards

John.

 

I recommend to as low as 2-3%... does not have to go all the way to zero.

 

the battery will automatically discharge itself to 0% even though you don't use it.

 

thats not very safe to let a battery drain itself away... when storing it away for a long time.

A battery should get charged to max, remove it, store it, and use it again to charge it back up to max (a stored Li-Ion battery should be used at least 2-3 times a year to keep its longevity)

 

is it true that DELL once advertised their 9cell battery as being one that can be charged at any point (like at 40% and chargin to full) without having any effect on the bateries overall life?

 

if so, dell was full of crap

 

what? whenever i take my laptop mobile i dont wait for it to get down to 5% i just plug it back in when I get back to my AC power... sometimes thats 50%, sometimes thats 20%...........

i havent seen any issues.

 

basically that applies to all Lithium-ion batteries.......theoretically

Long term effect, takes some time for bad things show up.

 

The advice cited by the OP appears to be consistent with what's reported in this Wikipedia article, including the only fully discharge once every thirty cycles. Apparently, the point of this is not to protect against the memory effect, or lazy battery, but to recalibrate the state of charge meter.

Li-ion batteries do not suffer from the memory effect problem that affects, e.g., Ni-Cad batteries, and under which repeatedly charging, but only partially discharging the battery causes it to gradually lose its maximum energy capacity. Unfortunately, however, Li-ion batteries apparently slowly degrade over their lifetime, regardless of use, and regardless of whether they're fully discharged or not. As the article makes mostly clear, the degradation of a Li-ion battery's capacity is different from the "memory effect" that causes a Ni-Cad battery to lose maximum capacity.

 

does anyone noticed the development of technology has be slowed down recently? few years ago almost every major manufactures were talking about hydrogen battery, and claimed that it will hit the market in a short time. well....now few years passed.....no further progress have been reported.

 

batteryuniversity on li-ion batteries.

 

They probably didn't want laptops having 5+ hour battery without sacrifice (dimming the screen,etc) or without buying extra stuff (spare battery, battery in smart bay) too soon. Remember, you have to think about the industry as well when such solutions are being introduced. You think they can mass produce a car that runs on electricity alone right now? No way, what would happen to oil and gas in that space of time. So right now we got 'hybrids'.