How to fill a dry battery with sulphuric acid (Yuasa) 

This video demonstrates how to put acid into a dry battery - this is for a Yuasa branded battery, but the process should be the same for most dry cell stored batteries.
I 10Ah battery will take about 10 hours to fully charge from flat on a standard 1-1.2A charge. It's generally not recommended to fast charge a new battery. You can later top off the charge with a fast charger at 5A for 1-2 hours (2 hours for fully flat to full charge).
Be careful, wear gloves and goggles and try not to spill any acid - done properly it should be a safe clean job.