| Business | Phone |
| Advanced Electromagnetics 9311 Stevens Rd, Santee 92071 | (619) 449-9492 |
| Opti Fuse 9330 Stevens Rd, Santee 92071 | (619) 593-5050 |
| Hi Tek Power Corp 10221 Buena Vista Ave, Santee 92071 | (619) 258-7722 |
| Hitech Power 10221 Buena Vista Ave, Santee 92071 | (619) 258-7700 |