Between 10°C ~45°C is the manufactured recognized safe charging temperature.

Use the cell charger by following the instructions; avoid overcharging to prevent shortening cell life cycle.

Desktop charger is safer to operate on mobile phones than vehicle charger.

Do not charge lithium cells with NiCd & NiMH cell chargers. The differences in charger setting may be harmful to the cell.

Although preventive mechanisms are in place, lithium cell discharge current shall not surpass the discharge current listed on the product specification.

The discharge current slope is different from temperature to temperature. The normal acceptable condition for discharge is 20 to 60°C.

Lithium-ion cells should be preserved in dry and low temperature conditions. In the case of preserving mobile phone cells, it is recommend to first discharge the cell until 20 ％ state-of-charge remains, and then seal pack the cell and place it in a cool and dry place. Finally, remember to fully charge it every 3 to 6 month.

Keep it away from heat sources; avoid placing it under direct sunlight and in air sealed vehicles.　

Vehicle charger should not be used before the vehicle engine ignites and is running. The unstable voltage is harmful to the cell.

Resistance, voltage and impedance need to be unified when cells are in series / parallel connection.

Under no circumstances, shall the phone or the cell be placed in a position that is humid, hot, unstable or unsafe.

Under no circumstances shall conductive objects of any kind be placed near the two ends of cell batteries.