Samsung T7 19 uses a lithium battery, which has been activated when leaving the factory, and the lithium battery has no memory, so it can be charged as needed, so it takes about 2 hours to charge the machine normally for the first three times 1-2 hours, and more than three times to charge it normally. It is recommended not to use the mobile phone when charging. You don't have to use up all the power when charging the mobile phone. When the machine prompts that the power is low or the remaining power is insufficient, you can charge it.

Here are some tips for using mobile phone batteries:

1. Do not overdischarge. When the device prompts "insufficient power", it should be charged; It is not charged until the equipment is automatically turned off, and the battery has been over-discharged. This will affect battery life.

2. Don't overcharge. When the charger gives a full indication, you should unplug the charger. Nowadays, chargers are generally designed to be full of self-stop, so it's okay not to take the battery off the charger for a short time. However, if the battery is left on the charger for a long time until the grid voltage rises late at night, the charger that has stopped charging will continue to charge after the voltage rises, causing the battery to overcharge. This will affect battery life.