1. Product Introduction
This product is a dedicated DIY power bank case, compatible with 18650 lithium batteries (batteries not included). Made of environmentally friendly and durable materials, it features a compact structure and easy installation, meeting users' needs for assembling personalized power banks independently. The case is built with installation slots for 18650 batteries, electrode contact positions, and reserved holes for charging/discharging ports, compatible with mainstream power bank protection boards (to be prepared by the user). It is suitable for electronics enthusiasts, DIY lovers, and various scenarios requiring independent power bank assembly.
Important Note: This product only includes the power bank case. It does not include 18650 lithium batteries, power bank protection boards, charging cables, ports, or other accessories, which need to be prepared and assembled by the user.
2. Product Specifications
| Parameter Name | Specific Specifications |
|---|---|
| Product Name | DIY 18650 Power Bank Case |
| Compatible Batteries | 18650 lithium batteries (single/multiple, quantity depends on case design) |
| Battery Voltage Compatibility | 3.7V single lithium battery (multiple batteries require a corresponding protection board for series/parallel connection) |
| Case Material | ABS environmentally friendly plastic (high temperature resistant, anti-drop, scratch resistant) |
| Case Size | Subject to actual product (compact and easy to carry) |
| Input | DC 5V/2A |
| Output | DC 5V/2A |
| Ports | 2 USB-A discharge ports, 1 Micro-USB charging port, 1 Type-C charging port |
| Power Capacity (assembled) | Up to 15000mAh (depending on batteries used) |
| Function | Power Bank + Rechargeable 18650 battery charger |
| Application Scenarios | DIY power bank assembly, electronic production, outdoor emergency power supply assembly, etc. |
3. Package Contents
The package includes the following items:
- 1x DIY 4x18650 Battery Phone Charger Box
- 1x Screwdriver
- 4x Screws
4. Setup and Assembly
4.1. Required Self-Prepared Accessories
Please prepare the following accessories before assembly (none are included in this product) to ensure smooth assembly:
- 18650 lithium batteries: The quantity matches the case design. It is recommended to choose qualified batteries produced by regular manufacturers, select capacity according to needs, and avoid using damaged or swollen batteries.
- Power bank protection board: Required for multiple batteries (series/parallel connection) and for safe charging/discharging.
- Charging cables and ports: To match the reserved holes for Micro-USB and Type-C charging, and USB-A discharge.
- Soldering equipment (if needed): For connecting battery poles and protection board.
4.2. Assembly Steps (Follow strictly to avoid damaging accessories)
Step 1: Case Disassembly
Use a screwdriver to unscrew the fixing screws at the bottom of the case (some models are snap-on and can be gently pried open directly). Separate the case into upper and lower covers and place them on a clean, flat desktop to avoid scratching the case.
Step 2: Battery Installation and Fixing
- Check the appearance of the 18650 battery to confirm there is no swelling, damage, leakage, or other abnormalities; if there are abnormalities, do not use it.
- Put the battery into the battery slot inside the case according to the direction (pay attention to the corresponding positive and negative poles; the positive and negative pole marks "+" and "-" will be marked inside the case, do not reverse them).
- For multiple batteries, connect them in series or parallel according to the requirements of the protection board (series connection increases voltage, parallel connection increases capacity). Connect the positive and negative poles of the batteries with wires. It is recommended to solder the connection firmly and wrap it with insulating tape or heat shrink tube to prevent short circuit.
- Fix the connected battery pack in the battery slot of the case to ensure the battery is not loose or shaking.
Step 3: Case Assembly and Testing
- Align the upper cover of the case with the lower cover, gently snap them together (snap-on) or screw back the fixing screws with a screwdriver (screw-type), ensuring the case is assembled tightly without looseness.
- Prepare a charging adapter, insert the charging cable into the charging port of the case, connect to the power supply, and check if the indicator light of the protection board lights up normally (usually the indicator light is red when charging, and turns green when fully charged, subject to the protection board instructions).
- After charging for a period of time, disconnect the power supply, connect a mobile phone or other device to the USB-A discharge port of the case, check if it can discharge normally, and confirm the assembly is successful.
5. Operating Instructions
5.1. Charging the Power Bank
Connect a compatible 5V/2A charging adapter to the Micro-USB or Type-C input port of the assembled power bank case. The LED indicator on the protection board (if installed) will typically show a red light during charging and turn green when fully charged. Refer to your specific protection board's instructions for exact indicator behavior.
5.2. Discharging (Using as a Power Bank)
Connect your mobile phone or other compatible device to one of the USB-A output ports on the power bank case using an appropriate charging cable. The power bank should automatically begin charging your device. Ensure your device is compatible with 5V/2A output.
6. Storage and Maintenance
- When not in use, place the assembled power bank in a dry, ventilated, and cool place, away from fire, water, and places accessible to children.
- When not in use for a long time, it is recommended to keep the battery power at around 50% and recharge it regularly (every 1-2 months) to avoid battery damage due to over-discharge.
7. Common Problems and Solutions
| Common Problems | Solutions |
|---|---|
| Unable to charge after assembly |
|
| Unable to discharge after assembly |
|
| The case gets very hot during charging/discharging |
|
| The case cannot be snapped together or is loose |
|
8. Safety Precautions (Top Priority, Must Be Strictly Followed)
This product is a DIY accessory. Improper operation during assembly and use may cause safety hazards such as battery short circuit, fire, and leakage, endangering personal and property safety. Please follow the following precautions:
8.1. Battery-related
- Only 18650 lithium batteries can be used; other types of batteries are prohibited.
- Do not use swollen, damaged, leaking, or aged batteries.
- Do not directly short-circuit the positive and negative poles of the battery.
- Do not disassemble, pierce, squeeze, expose to sunlight, or throw the battery into fire or water.
8.2. Usage Process
- After assembly, do not expose to sunlight for a long time or approach high-temperature objects.
- Do not squeeze or drop the case forcefully.
- Use a charging adapter produced by a regular manufacturer when charging, and avoid using inferior chargers.
- If the case becomes hot, has an odor, smokes, or other abnormalities during charging, disconnect the power supply immediately and stop using it.
8.3. Other Precautions
- This product is only used for DIY power bank assembly and is prohibited for other unintended uses.
- If you encounter any questions during assembly, do not operate forcibly; it is recommended to consult professional electronics enthusiasts or relevant technical personnel.
9. User Tips
No specific user tips are available at this time.
10. Warranty and Support
This product is a DIY accessory and does not meet all the testing standards of finished power banks. Users must check the safety themselves after assembly, and the use risk shall be borne by the user.
If the product itself has quality problems (such as case cracking, hole deviation, etc.), please contact the seller for return or exchange within 7 days after receipt. No handling will be done after this deadline.