Only 4 Is Good

Baru open, Keep in room temperature, expire date on 2018 but why still only 4 are in good condition and the rest semua low batt one? 
Apa lagi you thing I just keep my mouth shut? I tarus bring back to the kedai runcit and tell the boss to change the new one for me. If is only one or two pieces never mind lah... but this one I bought one more than half is low batt one sure I want to fight for my right lah!!! Some time if we diam diam rugi one is we sendiri saja!
I been using this brand for many year already and this is my first time I kana like this. If you also have a same problem like my please bring back and change the new one.
Thanks to the boss let me change a new pack.....