Reminder of Battery Use :
New batteries or batteries that have been stored for a long time may require a longer initial charge time. The red LED will be ON only after charging for over 30 minutes, if the battery voltage is below 2.5 V. Suggest to have a full charge for at least 8 hours before operation.
Notes about charging the NiMH (Nickel-Metal Hydride) battery for FM-130:
| Status | LED Description |
| 1. Ready to charge | Once the scale is connected with AC power mains, the green and red LEDs will be inter-flashing for 3 seconds as a self-diagnosis. |
| 2. During charging | The red LED will be ON. |
| 3. Finish charging | The green LED will be ON. |
| 4. Battery fault | The green and red LEDs keep inter-flashing without stop. |
| 5. Without battery | The red LED will be ON. |
