Product Features: 1, You can check the battery level. 2, Up to 3 batteries can be put in, charging in order of power level from high to low. The battery with high power level is charged first. 3, There are full charging mode and storage charging mode Storage charging mode: 60% of battery power is the best for long-term storage. Storing the battery with full charge is easy to bulge, and storing it without charge may lead to battery failure. Storage mode is to charge the battery below 60% to 60% for long term storage. 4, Support PD, QC3.0 fast charging.
eBay