Khoom nta:
1. Kev tiv thaiv kev ruaj ntseg tiv thaiv overcharge thaum hmo ntuj, kom ntev lub roj teeb ntawm koj lub xov tooj
2. Cias tso cia kom pib them
3. Cov kis tau tus mob siab dua, kev them nqi nrawm dua
4. Built-in ntse nti los txheeb xyuas cov khoom them ceev ceev teb