ok, just spent USD 17 for 2 x phottix battery (thanks to Yoh who pointed out the lobang)
i am still a bit skeptical about using 3rd party batteries so will only use this set of batteries when i use my battery grip (if anything happens at least the battery grip gets it first haha) while not using battery grip i will use back the original battery (which after checking with Canon service center, the discharge got 2 hours).