B + connected to the battery positive, B-connected battery negative. Must not be reversed, or directly scrapped.
Synchronous rectification efficient boost, heat a small, charge and discharge maximum current of 2A
Features:
Intelligent output device after charging full, automatically stop charging,
to prevent mobile phones overcharge.
Output voltage and current stable, will not harm user devices.
Specifications:
The following parameters allow 5-10% of the test error
Applicable battery type： 3.7V Lithium Battery Battery
Battery overcharge protection cut-off voltage： 4.25V
Battery over discharge protection cut-off voltage： 2.8V, less than 3.0V to stop output
Battery short circuit protection ：Yes
Output voltage ：5V
Charging input voltage ：5V
Output current (MAX)： 2A, battery voltage = 3.7V
Charge current (MAX) ：2A, battery side measurement, constant current mode
Battery-powered output conversion rate：> 90%, battery> 3.2V, output ≈2A
Charge and discharge indicator： LED lights
The battery charge indication ：Yes
Charge and discharge at the same time: Yes, switch off a few seconds
Size: 65X25X11mm
The above parameters from the pure resistive load under the working state, the current belongs to the limit parameters, the actual use need to consider the margin, by the battery protection circuit and switching power supply response time ripple and other factors, sensibility and capacitive and some sensitive to interference May be affected, the actual use of the test to prevail.
B +, B-, in the case of no battery, only the case of the charger, with a multimeter to the voltage may be more than 3.8V, which is normal, you are in parallel at both ends of a suitable resistor or connected to the battery Will never, far more than the above cut-off voltage.
Package included:
1PC x Mobile Power Bank 18650 Battery Charger PCB
