Raspberry Pi - Lightning Bolt - Under voltage Detected
If you don’t provide enough power to your Raspberry Pi you will likely have problems. If you see either of these things it is an indication that you are not providing enough power.
- “Under voltage detected” warning message
- Lightning bolt in the corner of the screen
This usually means that your power adapter doesn’t apply enough amps. If you are using a battery pack, the battery might be getting low or might not be powerful enough to begin with.
Here is nice little table showing how many amps you neeed for each model of Raspberry Pi:
| Model | Power | “Recommended PSU AMPs” |
| Raspberry Pi B | 5 V via MicroUSB or GPIO | 1.2A |
| Raspberry Pi A | 5 V via MicroUSB or GPIO | 700mA |
| Raspberry Pi B+ | 5 V via MicroUSB or GPIO | 1.8A |
| Raspberry Pi A+ | 5 V via MicroUSB or GPIO | 700mA |
| Raspberry Pi 2 B | 5 V via MicroUSB or GPIO | 1.8A |
| Raspberry Pi 2 B (v1.2) | 5 V via MicroUSB or GPIO | 2.5A (?) |
| Raspberry Pi 3 B | 5 V via MicroUSB or GPIO | 2.5A |
| Raspberry Pi 3 A+ | 5 V via MicroUSB or GPIO | 2.5A |
| Raspberry Pi 3 B+ | 5 V via MicroUSB or GPIO | 2.5A |
| Raspberry Pi 4 B (1 GiB) | 5 V via USB-C or GPIO | 3.0A |
| Raspberry Pi 4 B (2 GiB) | 5 V via USB-C or GPIO | 3.0A |
| Raspberry Pi 4 B (4 GiB) | 5 V via USB-C or GPIO | 3.0A |
| Raspberry Pi 4 B (8 GiB) | 5 V via USB-C or GPIO | 3.0A |
| Compute Module 1 | 5 V | na |
| Compute Module 3 | 5 V | na |
| Compute Module 3 Lite | 5 V | na |
| Compute Module 3+ | 5 V | na |
| Compute Module 3+ Lite | 5 V | na |
| Raspberry Pi Zero (v1.2) | 5 V via MicroUSB or GPIO | 1.2A |
| Raspberry Pi Zero (v1.3) | 5 V via MicroUSB or GPIO | 1.2A |
| Raspberry Pi Zero W | 5 V via MicroUSB or GPIO | 1.2A |
| Raspberry Pi Zero WH | 5 V via MicroUSB or GPIO | 1.2A |