1 cell with 5800mAh? Those are big ones. For a cell with 5800mAh, 1C means that you charge at 5800mA which means 5.8 Amps. 2C would be twice as much so 11.6Amps, or 0.5C means 2.9Amps . These numbers are for cells connected in serial. If they are parallel you can multiply that by the number of cells.
Another example, having 4S2P, so 4 in serial, and these 4 another time in parallel. So 2 blocks, where each block consists of 4 cells in serial. These two blocks are connected parallel. Resulting in 8 cells total would result in Capacity * number of cells, which is 5800mA * 2 => 11.600mA => 11.600 Amperes
Please check the datasheet of your cells regarding the C rating, that's usually specified there. 1C may be a good rule of thumb but I saw cells which take more or even less.
Charging the cells with too much current can result in a steam/fire/explosion.
I sometimes use twice the specified current, but I also check the temperature every 5-10 minutes since it's really dangerous. I think fast charging also reduces the livetime so better stick to the recommended values.
Edit: Also very important: If you connect cells parallel you need to ensure they are evenly charged. If one cell is full and the other one is empty, the full one will charge the empty one uncontrolled. It might be possible that the current is way too high and the empty cell starts steam/fire/explosion.
And as katzohki said, use balance charging. That means if you have cells connected in serial you have an additional wire between each cell.
So for a Block of 3 cells it looks like this: -C x1 C x2 C x3 +
C is a cell, - is minus, + is plus, x are balancing connectors. Where minus and plus give you the total voltage of the block. x1 is the first balancing connector providing 4.2 volts between - and x1, x2 is the second balancing connector at 8.4 colts between - and x2, and x3 is the same as + giving you the total of 12.6 Volts. A balancing charger can use these different voltages to determine the voltage of each cell, and these points are also used to charge cells independently. The balance charger first charges the empty batteries until all batteries have equal charge, then they are charged together.
In whatever way cells are connected, serial or parallel it's getting dangerous if they are not charged equally.
Edit2 You should also think about buying a battery charger from the car/airplane/quadrocopter area like the Imax B6. I'm really happy with mine, I can charge EVERYTHING with it.
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR12.TRC2.A0.H0.Ximax+b6.TRS0&_nkw=imax+b6&_sacat=0But for your case you might want to look for a stronger one which can provide more Amps.