3.7V 9V 5V 2A Adjustable Step Up 18650 Lithium Battery Charging Discharge Integrated Module:
This is a mini 5v up which have TP4056 based Lithium-Ion Battery Charger With DC To DC Step Up Boost Converter Module which allow you to get 5v 9v or 12v
Features:
100% Brand New and High Quality
Can be used for multimeter, converted to lithium battery charging
For example, VIN+Port input 5V solar panels, BAT+port can output 4.2V to charger 3.7V 18650 battery
Note: The OUT+Port can output an adjustable voltage.
Specifications:
Input voltage: 4.5-8V DC
Output voltage: 4.3-27V DC (Continuously adjustable)
Charging voltage: 4.2V DC
Charging current: Max. 1A
Discharging current: Max. 2A
Size: 3.3x2.3cm/1.3x0.91"
Package Include:
1XLithium Ion 18650 3.7 V 4.2 V Battery Charger DC-DC Board Step Boost Module TP4056 DIY Kit
Tutorial:
https://stem.pk/how-to-make-12-volt-with-3-7-volt-single-cell-battery/
