Black 3.7V to 9V 5V Multimeter Modified 18650 Lithium Battery Charge Boost and Discharge Integrated Adjustable Module 2A（Type C）

This integrated 18650 lithium battery module combines charging, boost, and discharge functions in one compact board. Designed for single 3.7V lithium cells (4.2V full charge), it supports adjustable boost output from 4.2V to 28V with up to 5W power. Featuring Type-C input and programmable charging current up to 1A, it ensures stable constant current/constant voltage charging. Built-in protections include over-temperature, soft start, reverse polarity, 0V activation, and 2.9V trickle charging. Dual LED indicators (Red: CHRG, Blue: STDBY) clearly show charging and standby status. Ideal for multimeter modification and portable DIY power applications.

Features:

1. Integrated charging, boost, and discharge module
2. Supports single 3.7V lithium battery (4.2V full)
3. Programmable linear charging current up to 1A
4. Adjustable boost output: 4.2V–28V
5. Maximum output power: 5W
6. Type-C input interface
7. Dual LED status indication (CHRG/Standby)
8. Over-temperature & reverse connection protection

Package Includes:

1 x Black 3.7V to 9V 5V Multimeter Modified 18650 Lithium Battery Charge Boost and Discharge Integrated Adjustable Module 2A（Type C）