J5019 3.7V 9V 5V 2A Adjustable Step Up 18650 Lithium Battery – Integrated Charging & Discharge Module for Flexible Power Applications

Input voltage: 4.5-8V
Output voltage: continuous adjustable 4.3-27V (Counter clockwise to boost voltage)
Charging voltage: 4.2V
Charging current: up to 1A
Discharge current: the maximum 2A
Output reference maximum current: 5V 1.4A, 9V 0.8A, 12V 0.6A
Quiescent current: about 0.5 mA
Overshoot protection: Yes
Over discharge protection: None (also can be said yes, because 2V cut-off boost but does not block the output, output has 2V)
Deadline boost:: 2V, depending on whether added the additional protection board
Size: 3.3 x 2.3 x 0.9cm