This is the mobile power module Accessories, 18650 Circuit board shell. Meet the individual needs of your DIY, but you must understand basic electronic assembly. The use of the positive B + and b-negative welding note cannot be canceledBatteries: polymer battery 18650 lithium battery cell phone battery Tablet battery MP3 battery can be connected to a lithium battery can also be connected in several sections of lithium batteries, as long as the voltage is 3.7-4.2 V in parallel,

Specification of 5V 1A Power Bank Charger Step Up Boost Charging Circuit Module Lithium Battery DIY Power Bank Module:

1. Input: 5 V 1A
2. Charging and discharging indication
3. Size: approximately 22mm * width 17mm * thickness 11mm
4. Internally installed charging and discharging power MOS
5. Preset 4.2V charging voltage, precision ±1%
6. Max 8uA standby current
7. Integration charging management and discharging management
8. Intelligent temperature control and overtemperature protection
9. Integration output overvoltage protection, short circuit protection, overload protection
10. Integration overcharging and over-discharging protection
11. Support trickle mode and zero voltage charging
12. Output: 5 V 1A
13. Lithium voltage: 3 v-4.3 V
14. Ports: Micro USB Android port. USB port output
15. When charging: red light flashing Full charged: red light for a long time
16. Has protection functions, protects from overcharger/overload (supports charger and discharger at the same time)

Package Include:

• 1X 5V 1A Power Bank Charger Step Up Boost Charging Circuit Module Lithium Battery DIY Power Bank Module