1, check your mobile phone battery, there are usually three to four contact pieces, note that marked with a plus sign, minus (positive and negative) sign, is used to connect to the charger contact point.
2. Adjust the adjustable charging foot of the sea and land to be consistent with the width of the positive and negative electrodes of the battery, mainly not the right or wrong contact piece.
3, pay attention to the positive and negative terminals of the battery to correspond to the charger (the new universal charge can automatically identify the positive and negative terminals), the reverse will not be able to charge.
4. Connect the charger with the battery to the power supply and start charging until it is full.
5. Remove the power supply in time after it is full, and do not overcharge for a long time.