1.Redirect the Old pages to the New ones

Once you upload the content on the new website you will need to place redirects from the old domain to the new one : laptop power supply. Note that this should be done on the page level, meaning that each page of the old site should be redirected to the new URL of the page on the new domain. Map each page to the appropriate new URL and don’t just redirect all of them on the new homepage.

It is strongly recommended to use 301 redirects because in this way you manage to pass to the new website most of the metrics, characteristics and statistics (PageRank values, links, anchor text data etc). Nevertheless note that 301 redirects should be used for permanent changes. If your plan to undo this change on the future you should use a 302 redirect (note though
EG:
we make htaccess file,detail as follow:

# BEGIN
Opions +FollowSymLinks

RewriteEngine on

rewritecond %{http_host} ^olddomain.com [nc]

rewriterule ^(.*)$ http://www.laptopbatteryadapters.com/$1 [L,R=301]

# END

2.Use the Change of Address tool in Google Webmaster Console

Another thing that you should do is use the Change of Address tool in Google Webmaster Console. After registering both the old and the new website to Google Webmaster tools you should specify that the old one has been transferred to the new address. The Change of Address tool works at the site level, which means that it clearly helps Google understand that this transition happened for the whole domain and not for specific pages of your site.

3.Update the important Backlinks

Even though the 301 redirects are supposed to pass most of the PageRank and anchor text data, it is strongly recommended to try to update the most important backlinks (links from reputable sources with high PageRank) that point to your old website and link directly to the new pages. Of course you don’t have to contact all the webmasters that link to your website, but instead focus only on the most important ones. In order to get a list of all the Backlinks of your website you can use the Backlink Analyzer tool or Google Webmaster Tools console.

when i update my website,we not update the important backlinks,it is too troublesome.

4.Be patient & Keep it up-to-date

Changing your domain name is among the most major updates that you can do to your laptop ac adapter website. Be patient and make sure you dedicate time to test everything before you transfer your whole website. Also make that you will renew your old domain names regularly and that you will not let them expire. In this way you will not lose any referring traffic or PageRank that is coming from old backlinks. Last but not least don’t forget to maintain the 301 redirects from the old domain to the new one and to renew the change of address every 180 days.

we have changed the domain 1 month: the organic traffic loss vast.many keyword can not find,the old domain has no results.but the new domain also has no rank.such as: laptop ac adapter, dell ac adapter, dell pa-10, dell pa-12,toshiba pa3468u-1aca,toshiba ac adapter,sony vgp-bps9/b,sony vgp-bps9/s.

only few keywords can has page rank.we will test it then and show the result