brand new CF Sub battery not working

i bought 2 of these batteries earlier today from a local vendor. the guy set up my kit with one of the batteries and it works just fine while the other doesnt turn on after 5 presses of the button (no led, no vapour). I tried charging it with an aspire charger that works for the first battery (red light with green flash on charger, blue led on battery), but for this battery i get both red and green on the charger (no flashing) and the battery led is blank. is there something i had to do before starting a fresh battery or is this one dead?
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