Here is a link to the scholarly lowdown on all the artillery units in the AZW
Military History Journal Vol 4 No 4
ARTILLERY IN THE ZULU WAR - 1879
by Major D.D. Hall
http://samilitaryhistory.org/vol044dh.html
The section on Isandlwana:
Isandlwana - 22nd January, 1879
Section N/5 Battery
Two 7 prs
Rocket Battery
Three rocket troughs
N/5 Battery (less one section) accompanied Lord Chelmsford on his abortive reconnaissance in force, and took no part in the battle. The Rocket Battery, with its equipment carried on mules, then accompanied Col Durnford's force when it also moved out of camp; but the battery was unable to keep up with the remainder. When firing was heard to their left, the Rocket Battery and its escort turned in that direction, but they were almost immediately engulfed by the Zulus. There was only time to get off one rocket before the enemy was upon them.
Maj Stuart Smith, the Captain (or second in command) of N/5 Battery, returned from Lord Chelmsford's force before the Zulus attacked, and took command of the artillery left behind. This only amounted to one section of two guns-and fifty men left in camp.
The Zulus advanced very rapidly when they attacked. The guns opened fire, but it was soon necessary to change to case shot, which is not normally used at ranges greater than 300 m. The two guns were quite incapable of stopping the Zulu masses. After a round or two, the order was given to retire. Maj Stuart Smith was wounded, and there were other casualties as well. There was no time for the men to take their seats on the guns and limbers when the guns moved off, and they had to run alongside the guns.
The intention was to take up another position at the camp, but the Zulus were there first. The guns went straight through the camp, losing more men on the way. Eventually, they became stuck in a ravine, and the drivers, who now alone remained, were pulled off their horses and killed. There was no time to spike* the guns.
{*To spike a gun, a spike (like a nail) was hammered into the vent, thus preventing the firing of the gun.}
N/5 Battery had lost Maj Stuart Smith, 61 NCOs and men, two guns, 24 horses, 30 mules and 534 rounds of ammunition. The Rocket Battery lost Maj Russell, six men and all its equipment.