This battery may not be dead. Most probably it is deep discharged and internally short circuited, but this does not mean, it is dead. Many people don't know that, but you can easily "revive" the cells. Disassemble battery to access cells and measure voltage of every one, when voltage reads 0.00V, cell is in short circuit.
NiCD cells, mostly old ones in bad condition tends to fall into internal short circuit when being deep discharged for some time, conductive bridges grow there between electrodes causing short circuit. We need to burn them by high current, because such dead cell can not be charged - all charging current flows through these bridges like through a wire and it is not charging the cell.
Find source of high current, I have used 5 mF capacitors before, but it's not enough for some cells, now I am using 3 LiIon cells in series from old notebook battery, they are almost dead and useless, but still can deliver more than 10 amps for a short while, perfect for the purpose. Any other battery can be used, voltage is not important, but high current capability is. Connect + of current source to + of dead cell and briefly connect - to -, it should produce spark, don't let it be connected more than second! And never ever connect + to - and vice versa, or you will damage the cell. After that procedure, measure cell voltage again, it should be normal now, or at least non zero. If it's still absolute zero, try again or use stronger current source. After you revive all "dead" cells, let battery rest few minutes and then you can normally charge it and it should work almost like before. I am doing it regularly and I have saved a lot of batteries so far. But yes, so old battery could be somewhat weak and low capacity for the drill now and probably won't hold the charge long, but better than nothing.
And about charging, yes, you can build simple charger, best and safest is to use 1/10 C current for 16 hours like said before, or use higher current, but you will do good, if you will use timer for safety (and battery life span). This is the simplest way.
But there are better ways, if I can recommend you something, buy some charger like people in RC uses, it's cheap enough, can charge almost every battery in the world, has automatic end of charging cycle when battery is fully charged, lot of safety features, adjustable charging current, shows voltage, current, capacity, time, can measure battery capacity, some also internal resistance, can cycle or regenerate the battery... and has very simple and convenient use. I am using HobbyKing ECO eight and I have thrown away all other chargers from drills, lamps... this one charges it all.
Good luck and I hope, this will help. LQd