C4 Explosive Charges give your soldiers an explosive means of demolishing terrain. Weighing 1 kilogram, its "Incendiary" damage type causes quadruple the rated damage to buildings. C4 charges are automatically upgraded to Plasma Charges once the necessary research is complete.
|60 incendiary||200||3.5 tiles|
To use C4, you must first put the C4 into the soldier's Primary Weapon slot. Left-click on it there, and a small number pad will appear; use this to set the C4's timer at a cost of 2 TU's, or right-click to disarm the timer. You then get a throw cursor; it costs 60% TU's to throw the C4, or you can of course right-click to dismiss the cursor. Left-clicking on an armed C4 charge will let you reset the timer.
Be warned; the C4 will explode once its timer runs out - regardless of whether the soldier is still carrying it.