Power UP Units

DC-DC Voltage Regulator Voltage Stabilizer 8A Power Supply Adjustable Speed Controller DC 12V

DC-DC Auto Boost Buck Converter Module DC 2.5-15V to DC 3.3V 5V Step Up Down Voltage Regulator Power Inverter Supply

18650 Dual Micro USB 3.7V to 5V 2A Boost Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Step Up Module With Led

TP4056 2A Micro USB 18650 Lithium Battery Boost & Charger Module 3.7V to 5V 9V 12V
Can be used for multimeter, converted to lithium battery charging
Note: The OUT+Port can output an adjustable voltage
Input voltage: 4.5-8V DC Output voltage: 4.3-27V DC,Charging voltage: 4.2V DC
Charging current: Max. 1A Discharging current: Max. 2A

MT3608 DC-DC Boost Power Converter 2A Adjustable Step Up Voltage
The Maximum Output Current: 2A
The Input Voltage: 2V ~ 24V
The Maximum Output Voltage: 28V
Efficiency: Max 93%
Product Size: 36 x 17 x 14 mm/1.44 x 0.68 x 0.56 in(L*W*H)

XL6009 DC-DC Booster Power Supply Module Output is Adjustable Super LM2577 Step-Up Module DC DC Step Up Converter Boost Board