HLeejpn wrote:
I did learn one other thing from another link on Apples site - that it is not recommended to leave the power cord hooked to the MBAir while using but rather use the battery power more than the corded power.
There is no factual basis for that premise. There are two rules that you should follow in regards to battery usage;
If you are using the MBA under AC power all the time, at least once per month use it under battery power to about the 40% charge level and then reconnect to AC. Lithium ion batteries need periodic 'exercise' in order to ensure a long operating life.
Discharging the battery totally will shorten its useful life.
I suspect that your problem lies with your battery. The best source is Apple and only NuPower and Anker so far have proven to be acceptable third party alternatives. Bargain batteries as found on ebay should be avoided because there are too many counterfeit knockoffs or simply poorly made ones that will cost you more in the long run.
Ciao.