GemPen needs to be charged from an external power socket with a quality charger to ensure your GemPen charges properly.
Battery Charging Source
- Charge with good quality charger that will deliver not less than 5V and 1A
- Charge directly from a wall socket, not a laptop USB
If you charge your GemPen from an insufficient power supply (such as an USB port from a computer or a low quality adapter that can’t ensure a minimum of 5V,1A), your GemPen might not charge properly and you risk for the battery to discharge below 3 Voltage.
If you charge your GemPen from an insufficient power supply (such as an USB port from a computer or a low quality adapter that can’t ensure a minimum of 5V,1A) when the battery already is discharged below 3 Voltage and the safety switch is activated, the battery might not get enough power to be able to recover, no matter how long you leave it in.
If you don´t use your GemPen regularly we recommend that you still maintenance-charge it at least once a month to prevent the battery to discharge below 3 voltage.
If the battery in GemPen becomes discharged so that it is under 3 voltage, a safety switch activates within the battery. This safety switch prevents the battery from getting completely discharged which will in turn break the battery. Once the battery reaches the level of under 3 voltage and the safety switch activates, none of the indicators will work. If your GemPen gets to this state you need to charge your GemPen from a power socket, using a charger of good quality that will deliver not less than 5V and 1A, for a longer period of time. Between 12-24 hours (sometimes even as much as 48 hours depending on the state of the battery). This is because the activated safety switch prevents the battery to charge at a normal speed. Once the battery has been charged up to 3 voltages it will start charging as normal /at normal speed again.