The TP5400 is a dedicated power bank charger for single-cell lithium-ion batteries and a constant 5V boost controller. The charging section integrates high-precision voltage and current regulators, pre-charge functionality, charging status indication, and charging cutoff, and can output a maximum charging current of 1A.The boost circuit utilizes a VFM switching DC/DC boost converter manufactured using CMOS technology, exhibiting extremely low no-load current. It features very low no-load power consumption (less than 10µA) and a boost output drive current capability of up to 1A.No external buttons are required; it is plug-and-play.Input Section:* MICRO USB charging input: 5V (charging input voltage range: 5-9V)* Maximum charging current: 0.99A* Rechargeable battery: 3.7V single lithium-ion battery* Charging voltage: 4.2V Output Section:* Output voltage: 5V (uncharged)Note: When charging and discharging simultaneously, the output voltage = input voltage - 0.4V* Output current: 1AColor: As ShownMaterial: plasticPackage Contents:1*module 1*cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.