✅Parameter:
Product Name: Fast Charging Power Bank Kit
Input Parameters: 5V3A/9V2A/12V1.5A/20V3.25A
Output Parameters: 5V3A/9V2A/12V1.5A/10V2.25A/20V5A
Mainboard Interfaces: Equipped with Type C bidirectional fast-charging port + USB output port + Type-C bidirectional fast-charging cable interface
Display: LED display showing battery level/voltage/current
Battery Compatibility: Accommodates 4 x 21700 batteries (requires soldering; batteries not included)
Internal Battery Dimensions: 145*45*22mm
Mainboard Features: Comprehensive protection including overcharge/over-discharge/overvoltage/overheat safeguards. High conversion efficiency with stable current and voltage output

✅Important Notes:
1. 22.5W is Super Fast Charging. PD output supports 100W fast charging, PD input supports 65W fast charging. The included Type-C cable supports PD 60W bidirectional fast charging.
2. The mainboard is pre-installed and secured inside the front cover. Only the battery protection board needs soldering: connect the red positive wire to the B+ terminal on the protection board, and the black negative wire to the P- terminal. The battery connection consists of 4 x 3.7V 21700 cells soldered to a series protection board, which is then connected to the mainboard for use.
3. The protection board does not support spot welding with a spot welder. Soldering must be performed using a soldering iron with solder. Spot welding will damage the pads. Exercise caution during soldering.

✅Assembly Instructions:
1. The mainboard is pre-installed and secured inside the front cover. Simply solder the battery protection board: connect the red positive wire to the B+ terminal on the protection board, and the black negative wire to the P- terminal.
2. The protection board is pre-wired in series. Simply solder the 4 battery cells to the corresponding positive and negative terminals (B1 to B4) on the protection board according to the soldering diagram. Ensure correct polarity before soldering. The protection board does not support spot welding; use a soldering iron with solder. Spot welding will damage the pads. Exercise caution during soldering.
3. Solder the main board's positive red wire to the protection board's B+ position and the negative black wire to the protection board's P- position. Do not reverse connections, as this will burn the main board. Burnt ICs will show visible traces, which only occur from reverse connection or accidental contact.
4. After installing the mainboard and battery, secure the battery with adhesive tape. For certain battery models with thickness discrepancies relative to the casing, assess whether spacers are needed to prevent a sagging sensation when pressing the casing after assembly. Issues like battery rattling or casing deformation due to failure to check thickness differences or secure the battery with tape during assembly constitute improper installation. We assume no responsibility for casing damage or battery failure resulting from disassembly.
5. The snap-fit casing is not designed for repeated disassembly. Always test all functions—motherboard output/input, fast charging, buttons, display, etc.—before closing the casing. Ideally, perform several charge/discharge cycles to confirm functionality before sealing. Issues arising from assembling and closing the casing without prior testing constitute improper assembly. We assume no responsibility for casing damage or battery failure resulting from disassembly required due to such issues.

✅Instructions:
1. Regarding activating fast charging for your phone: Fast charging protocols are categorized as public or proprietary. This motherboard incorporates an intelligent fast-charging chip compatible with mainstream public fast-charging protocols, supporting rapid charging for various smartphone brands. Before ordering, please verify your phone's compatibility with public protocols to ensure fast charging functionality.
2. Regarding heat generation during charging: When the power bank is in operation, current flows through the motherboard and chips. Energy conversion inevitably involves losses, which dissipate as heat. During fast charging, higher power consumption results in more noticeable heat—this is a normal physical phenomenon.
3. Battery capacity display may appear inaccurate immediately after connecting the battery. The battery meter features a self-learning function for battery capacity. It will display accurately after several charge/discharge cycles.

✅Package include:
Kit x1