Create your own high-capacity power bank with this Dual Micro USB 3.7V to 5V 2A Mobile Power Bank DIY module. Designed for use with 18650 lithium batteries, this versatile PCB board features a boost step-up module to efficiently convert 3.7V to a stable 5V output. Equipped with dual micro USB inputs, it allows for flexible charging options, and the built-in LED indicators provide real-time status updates. Perfect for DIY enthusiasts and makers, this module is ideal for powering a variety of mobile devices on the go.

This tiny module is perfect for charging single cell 3.7V 1 Ah or higher LiPo cells such as 16550s that do not have their own protection circuit. Based around the TP4056 charger IC and DW01 Deep Drain Battery Protection IC this module offers 1A charge current. The module cuts off charging current when finished.

Furthermore, when the battery voltage drops below 2.4V the protection IC will switch the load off to protect the cell from running at too low of a voltage – and also protects against over-voltage and reverse polarity connection (it will usually destroy itself instead of the battery) however please check you have it connected correctly the first time.

Ensure the safety and efficiency of your LiFePO4 battery pack with this White 4S 100A Battery Management System (BMS) Protection PCB Board. Designed for 4-series (4S) lithium iron phosphate (LiFePO4) battery packs, this BMS offers robust protection features including overcharge, over-discharge, overcurrent, and short-circuit protection. It also includes balance charging to ensure each cell charges evenly, extending the lifespan of your battery pack and optimizing performance.