@mustaqeem the instructions from [post|446165] would only work if your battery was discharged below its charging threshold. It will not fix a battery. My suggestion would be that you start with a new battery. Your battery may have shown a proper voltage but may not accept a load or fail under a load. Replacing the battery will at least give you a known well starting point should further troubleshooting be needed. Check this teardown [guide|112412] to see what is involved with that.