that battery is the same battery as the initial brand walmart one, the memorex ones, and any other portable dvd battery that i've seen. just rebranded. you should search "dvd battery" or "portable dvd battery" on ebay. i'm sure you could find one for about $40 cheaper...or at least go to walmart and get the $50 one thats the exact same thing. unless you want to throw away money.
seriously tho, the memorex one i bought, althought its only 7.2v is the same exact size, shape, everything, the only difference is the sticker says "memorex" other than "initial" - and the lenmar looks to be the exact same. save your money for other fun taping stuff is my advice.