Battle . net Battle . net is Blizzard Entertainment ' s centralized account system for all their online games including " World of Warcraft " . For the the old site is still online for usage at classic . battle . net ( the EU version is no longer available ) . Less Battle . net , more Blizzard . Blizz ard is moving away from using the " Battle . net " name for feature branding purposes and using " Blizzard " instead . Some early examples are " Blizzard Streaming " and " Blizzard Voice " . The new name for Battle . net hasn ' t been formally announced . Due to the slow transition away from using the Battle . net brand for some form of " Blizzard " branding , it is not clear how much of Blizz ard web properties will stay and how much will transition to some other name . However , as of mid - late 2017 , the transition will feature a " Blizzard Battle . net " brand of some sort before Battle . net disappears , which may add confusion before clarity . The preventing of comments to the announcement article and lack of detail makes it anyone ' s guess what the changes will look like . The gaming media consensus appears to think that Blizzard is pulling back from the rebranding . Battle . net API . A way to programmatically get data from Battle . net via the web . Battle . net Balance . Starting with the Diablo III beta test , a new feature called Battle . net Balance is available to store virtual currency purchased with real money to buy game - related services ( character transfers , digital products like companion s and mount s , and previously to purchase items in Diablo III ' s now removed real - money auction house ) . Battle . net desktop app . A multi - launcher hub for Blizz ard games that gives new and status info . Battle . net Gift Card . A plastic or virtual gift card for use in recharging your Battle . net Balance . Battle . net Mobile Authenticator . A mobile authenticator app for Blizz ard games . Battle . net Shop . Online store for Blizzard virtual goods . See Blizzard Gear for info on the store for physical goods . World of Warcraft . Account merge available . Since spring 2009 " World of Warcraft " players can merge their accounts with their Battle . net account . The procedure is as followed , note that it cannot be reversed : " These steps may have changed . " Required merge . On Oct . 12 , 2009 , it was announced that WoW accounts would need to be converted into Battle . net accounts within 30 days . This is mandatory , as a Battle . net account will be required to log into the game after Nov . 11 , and anyone who wants to start a new WoW account has to make a Battle . net account first . Anyone who had converted their account before Nov . 11 would be mailed in - game a new penguin companion in thanks for converting early , starting later the week of the announcement . The first companions were mailed to players three days later , on Oct . 15 , 2009 . Once your WoW account has been converted , the current expansion that you play will show up as a ' merged game ' in your Battle . net account . If your WoW account has an authenticator attached to it , it will also be transferred over . New Community Sites . On Dec . 4 , 2010 , it was announced that the World of Warcraft community sites ( previously at http : / / www . worldofwarcraft . com and http : / / www . wow - europe . com ) would now be hosted on Battle . net : Change of look . Around mid - January 2014 , the look of the front page blog listing and the bylines on the battle . net community sites . The listing added larger thumbnails on the left and the bylines were simplified ( originally in the US form " by " author " " month " # , " year " " hh : mm " AM / PM " TZ " " and changed to " " author " " MM " / " DD " / " YYYY " " ; EU form " by " author " # " month " " YYYY " " hh : mm " " TZ " " and changed to " " author " " DD " / " MM " / " YYYY " " ) . Old Games . If you still have your old " Blizzard " games , you can add ( US , EU ) their ( CD - ) key to your Battle . net account so the both are linked together . Starcraft II beta opt - in . When the " Starcraft II " beta was upcoming , " Blizzard " allowed people with a battle . net account to opt - in for it . However they require you to have at least 1 " Blizzard " game linked with your battle . net account . Store . Your Battle . net account is directly linked to your Blizzard Store account and purchases should show up on your Battle . net account . So far Battle . net Balance cannot be used to purchase from the Blizzard Store . " By BlizzardTutorial "