@Ibnekhalid usually triangle sign meant to check your hybrid system or codes related to hybrid system. The code stated same, "change your battery pack". It may be initial time indicating this problem. However you can check your battery pack too. Just ask any good technician/electrician at your area who has good knowledge for hand held volt meter. Ask him to remove your battery pack and remove the metal case etc from your battery pack and detach ion plates from both sides which attach with nuts on battery. Once removed, those strips like ion plates from battery now the technician be able to check the battery pack units individually by putting hand held volt meter needles on negative and positive of volt meter on battery pack unit. Each unit individually should show 7.5 volt (or around) if any of the unit giving less than 7.5 and there is variation than it means you need to change that unit (I don't know if you can get battery current storage unit in Rawalpindi or not) if yes than you can simply replace the storage units giving readings below. If you won't be able to get unit individually so in that case you are in need to change your battery pack. So in this case you can see the position of your battery pack on your on.
To removal process of battery pack you can contact on my no. 0314-2042309.
Have a happy and safe ride,
Newtech Autos Karachi