Please correct me if my assumptions are wrong. Shelf life of Li-Ion battery is of more concern than some other batteries. Some bargains on new batteries may be iffy if they are old. No way to know. There are a lot of recycled batteries being sold that are not identified as used or "refurbished". No way to know. When it comes to Li-Ion batteries, there is a lot of crap out there. Don't buy any battery that doesn't come with at least a 1 year warranty from a reliable, well known, and expected to survive company. I thought that Li-Ion batteries were somewhat like flourescent lights in that their lifetimes are most limited by age and by the number of startups, not just by total acummulated time of being on. Since a test charge is given to the battery every time it is activated, this limits its life. Various System versions and hardware treat the test activation differently so we can get considerable differences on the life expectancy based upon this. Bottom line is: Always use your portable on external power if you can. Battery removed so no tests to battery are run. If you use your portable on external power, remove the battery before powering up. Don't leave your battery in the portable unless you are using the battery. Store your batteries where they will "age" the least, ie. cool, dry and least subject to damage. Question: is a freezer bad if in a moisture-proof package? Don
On Feb 11, 11:04 am, [email protected] wrote: > OWC are good dependable vendors, who do their best to support product > they sell. > Cannot say the same about the NewerTech NuPower batteries for Wallstreet. > > At end 2006 I bought simultaneously 1 x NuPower battery from OWC, and > 1 x "2-Power" brand (cheap import from Asia) from a local battery > specialist here in Australia. > > The NuPower Battery was DOA. I sent it back and received a > replacement. That was also DOA. The 3rd battery they sent me was > rated 4625 mAh, and lasted only a year until it too died. > > By comparison, the "2-Power" battery was 2/3 the price and performed > faultlessly. It is rated at 4800 mAh, and still gives over 3 hours > of use. > > When I ordered another one of these to replace the finally deceased > NuPower above, it was even better than the previous, showing a 5400 > mAh capacity in System Profiler. > > hth.. AD > > Do you have a link to a site that sells the "2-Power" wally battery? > ============================================== > On2010-02-09 18:52 -0800, John Carmonne wrote: > > >On Feb 9, 2010, at 6:46 PM, JOHN CARMONNE wrote: > > >> Hi all > >> Has anyone had experience with the ProLogix batteries from OWC? I > >>need a new one for my Wallstreet. > >> I bought a new one 14 mos ago from an internet seller the name on > >>the battery is Premium Power Products. It pitched already I have > >>one machine with a ten year old battery it's good for 2.5 hr > > >Correction > > >I ment Newer Tech Nu Power Batteries > > >John Carmonne > >Yorba Linda USA -- You received this message because you are a member of G-Books, a group for those using G3 iBooks and PowerBooks (we run a separate list for G4 'Books). The list FAQ is at http://lowendmac.com/lists/g-books.html and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g-books Support for older Macs: http://lowendmac.com/services/
