2 × 90 amaqembu inkumbulo umsebenzi;
Isilinganiso sokubala sevelu yokulinganisa yakamuva yezikhathi ezi-3;
Isikhombi sokuhlukaniswa komfutho wegazi (WHO);
Isikhombi sokushaya kwenhliziyo okungajwayelekile (IHB);
Umsebenzi wonyaka/inyanga/usuku/isikhathi;
Amandla ngamabhethri e-alkaline angu-4 AAA noma ugesi we-AC/DC;