plug or unplug
Posted 14 December 2009 - 07:04 AM
the question now is: what is it really? got an old laptop which has a dead batt after years of use. know a few friends that had laptops that had their batteries almost dead in just a few years..
Posted 06 January 2011 - 12:26 PM
I also prefer to recommend going for the heavier duty battery pack (12 cell versus 6 cell for example) when available. More milli amp hours of power is good, just like buying a bigger battery for your car. If your car requires 350 cold cranking amps and you buy a 450 CCA battery which is expected to decline to half power in five years, then it may only last two years before it has trouble starting your car and will need a jump if it does not start on the first try. But if you start out with an 850CCA battery , then even after five years if it is outputting 425CCA it can still start your car.
Posted 07 January 2011 - 12:37 AM
With all the students and teacher laptops we service probably over 1000, I find most batteries last about three to four years.
Posted 27 January 2011 - 12:37 AM
Hi Pete, could this be the 1st time to ever disagree with you my friend ?
All my laptops have been on charge almost 24/7, mostly desktop replacements, occasional war drive's on the cig/pipe lighter.
Ni/Cad is a bird of a different feather, great for maintaining the high voltage level before the voltage drop off curve takes a deep dive.
Example 20 years ago as a ham with ARES (Amateur Radio Emergency Service) said to another ham/pilot, I topped off my battery packs, the memory effect, admitted he did the same and of course broke the rule but critical to maintain ground contact in the CAP (Civil Air Patrol) plane, searching for lost soul later found 2,000 miles away, but we tried.
Lead-acid as in vehicles demands a trickle to maintain a charge and loves it for years.
NiMH (nickel-metal hydride) remains a favorite for return on the money, discharge/recharge a thousand times, loves a top off anytime.
Shelf life (longevity to maintain a charge) is amazing.
Now comes lithium-ion, my favorite
My laptops fail long before the battery does, IE a Toshiba from 7 years ago $2,200 still maintains a charge tho the GPU is gone.
Not a guess what the future holds with battery transportation cars.
Hi Steve, you understand well with experience...
This post has been edited by marsh_0x: 27 January 2011 - 12:53 AM