get the battery checked., using hydrometer at battery shop if any cell is weak ( SG under 1100 ) the hydrometer will tell the tale.
get the battery flushed, drain battery completely by inverting it in running water to avoid any acid vapor splash.
wash the battery clean and add fresh new battery electrolyte of 1260 specific gravity top up all cells install back in vehicle jump start if necessary and in 15-20 minute run battery will be back to normal.
cheers !
PYRO Battery electrolyte is BEST but only available in Lahore - I need 2 drums in Karachi if you can help, please