Linear voltage regulators such as the VR1 and the VRX have several advantages over switching type regulators, they are simple, inexpensive and generate very little RF noise. The disadvantage is, under certain conditions they can generate a lot of heat. The amount of heat depends on the current output and the difference between the input battery voltage and the output voltage (Vin - Vout). The tables below shows the maximum allowable current output for different battery voltages.
Derating Table for VR1-3.3V
| Vin | Vout | Max. Current allowed |
| 3.8 to 6 volts | 3.3 volts | 1 amp |
| 6.1 to 8.1 volts | 3.3 volts | 1/2 amp |
| 8.1 to 11 volts | 3.3 volts | 1/3 amp |
| 11.1 to 15 volts | 3.3 volts | 1/4 amp |
| 15.1 to 19 volts | 3.3 volts | 1/6 amp |
Derating Table for VR1-5V
| Vin | Vout | Max. Current allowed |
| 5.5 to 8 volts | 5 volts | 1 amp |
| 8.1 to 10 volts | 5 volts | 1/2 amp |
| 10.1 to 13 volts | 5 volts | 1/3 amp |
| 13.1 to 17 volts | 5 volts | 1/4 amp |
| 17.1 to 21 volts | 5 volts | 1/6 amp |
Derating Table for VR1-9V
| Vin | Vout | Max. Current allowed |
| 9.5 to 12 volts | 9 volts | 1 amp |
| 12.1 to 14 volts | 9 volts | 1/2 amp |
| 14.1 to 17 volts | 9 volts | 1/3 amp |
| 17.1 to 21 volts | 9 volts | 1/4 amp |
| 21.1 to 25 volts | 9 volts | 1/6 amp |
Derating Table for VR1-12V
| Vin | Vout | Max. Current allowed |
| 12.5 to 15 volts | 12 volts | 1 amp |
| 15.1 to 17 volts | 12 volts | 1/2 amp |
| 17.1 to 20 volts | 12 volts | 1/3 amp |
| 20.1 to 24 volts | 12 volts | 1/4 amp |
| 24.1 to 28 volts | 12 volts | 1/6 amp |
Derating Table for VR1-15V
| Vin | Vout | Max. Current allowed |
| 15.5 to 18 volts | 15 volts | 1 amp |
| 18.1 to 20 volts | 15 volts | 1/2 amp |
| 20.1 to 23 volts | 15 volts | 1/3 amp |
| 23.1 to 27 volts | 15 volts | 1/4 amp |
| 27.1 to 30 volts | 15 volts | 1/6 amp |
Derating Table for VRX
| Vin - Vout | Max. Current allowed | |
| .5 to 3 volts | 1 amp | |
| 3.1 to 5 volts | 1/2 amp | |
| 5.1 to 8 volts | 1/3 amp | |
| 8.1 to 12 volts | 1/4 amp | |
| 12.1 to 18 volts | 1/6 amp |