| 摘要 |
The present invention enables the smartphone to be charged by mounting a charging cable to an auxiliary battery charger. If a user mounts the smartphone on the charger and inserts a charging cable, a current flows into the mounted smartphone and if the smartphone is fully charged, the current changes the direction and flows into the auxiliary battery, thereby enabling to charge both the smartphone and the auxiliary battery when the user goes out for a long time or sleeps. The present invention can save time compared to when the auxiliary battery has to be charged separately, and also reduces cost, as only one charger is needed for doing the work of two. |
