Introduction
This manual provides essential instructions for the safe and efficient use of your DIY 18650 Power Bank Battery Box. Please read this manual thoroughly before installation and operation, and keep it for future reference.
The power bank case is designed to hold 18650 flat-head batteries (not included) and features multiple charging ports and a digital display for battery percentage. It is available in 8-slot and 10-slot configurations.
Product Features
- Supports 8 or 10 18650 flat-head batteries (user-supplied).
- Digital display for battery charge percentage.
- Multiple input/output ports: Micro USB, Type-C, and two USB-A outputs.
- Integrated flashlight function with two LEDs.
- Repeatable opening design for easy battery installation and replacement.
Setup and Battery Installation
Important: All 18650 batteries used must be of the same type and capacity. Do not mix different battery types or capacities.
- Before installing, test each 18650 battery to ensure it is functioning normally. The voltage should be between 3.2V-4.2V.
- Carefully open the power bank case. The design allows for repeatable opening, but it can be stiff.
- Identify the positive (+) and negative (-) terminals on your 18650 batteries. The positive pole typically has a concave circle on the edge of the head, while the negative pole is flat.
- Insert the batteries with the positive pole facing upwards, aligning the positive electrode with the protruding point (shrapnel) in the battery slot. Align the negative electrode with the flat shrapnel coil.
- Install all batteries in sequence, ensuring correct polarity for each. Installing batteries with incorrect polarity will damage the circuit board.
- Once all batteries are installed, close the lid securely.
Watch this video for a visual guide on assembly:
Operating Instructions
Charging the Power Bank
Connect a Micro USB or Type-C cable to the corresponding input port on the power bank and plug it into a suitable power adapter (e.g., 5V 2A). The digital display will show the charging progress.
Charging External Devices
Connect your device to one of the two USB-A output ports using a compatible charging cable. The power bank will automatically begin charging your device. The digital display indicates the remaining charge percentage.
Flashlight Function
To activate the integrated flashlight, double-click the power button. Double-click again to turn it off.
Maintenance
- Keep the power bank and batteries dry. Avoid exposure to moisture or liquids.
- Do not use or store the power bank in high-temperature environments.
- Clean the exterior of the power bank with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- If the power bank will not be used for an extended period, store it with approximately 50% charge to prolong battery life.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Power bank not charging / not powering devices | Incorrect battery installation (polarity reversed) Faulty batteries Loose battery contact |
Ensure all batteries are installed with correct polarity. Reversed polarity will burn the circuit board. Test batteries individually before installation. Ensure batteries are firmly seated in their slots. |
| Digital display not working | No batteries installed or incorrect installation Circuit board damage |
Verify battery installation and polarity. If damage is suspected, discontinue use. |
| Flashlight not turning on | Incorrect operation | Double-click the power button to activate/deactivate the flashlight. |
| Slow charging of devices | Batteries are connected in parallel | This is a characteristic of the design where batteries are in parallel. Ensure your charging cable and device support the 5V 2A output. |
Specifications
| Feature | Detail |
|---|---|
| Item Type | DIY Box & Shell |
| Battery Compatibility | 18650 Flat-head batteries (not included) |
| Battery Slots | 8-slot or 10-slot models available |
| Input Ports | Micro USB x1, Type-C x1 |
| Output Ports | USB-A x2 |
| Max Input/Output Power | 5V 2A |
| Display | Digital Percentage Display |
| Additional Features | Flashlight (2 LEDs) |
| Dimensions (approx.) | Length: 20 cm, Width: 12 cm, Height: 4 cm |
| Weight (approx.) | 0.118 kg (without batteries) |
| Origin | Mainland China |
User Tips
- Opening the Case: The case is designed for repeatable opening, but it can be tight. Exercise caution when opening to avoid damaging the plastic locks.
- Flashlight Operation: A quick double-click of the power button will turn the integrated flashlight on or off.
- Battery Flexibility: The power bank can function even with a single 18650 battery installed, though performance will vary based on the number and capacity of batteries.
- Charging Speed: Due to the parallel connection of batteries, charging of external devices may be slower compared to power banks with series battery configurations.
- Battery Quality: Using high-quality 18650 batteries with low internal resistance is recommended for optimal performance and longevity.
Frequently Asked Questions (FAQ)
- Q: Can I install AA 1.2V 600mAh batteries?
- A: No, this power bank is specifically designed for 18650 lithium-ion batteries. Installing other battery types like AA batteries is not compatible and may cause damage.
- Q: Does it support Power Delivery (PD)? If yes, what are the max wattages?
- A: The power bank supports a maximum input/output of 5V 2A. There is no indication of Power Delivery (PD) support for higher wattages.
- Q: Does it have overload protection for 18650 batteries, over-discharge protection, or short circuit protection on the outputs?
- A: The device includes basic circuit protection. However, it is crucial to install batteries with correct polarity, as incorrect installation can burn the circuit board. For optimal safety, use 18650 batteries that have their own built-in protection circuits.
Warranty and Support
As a DIY product, specific warranty details may vary. Please refer to the seller's policy for any warranty claims or support inquiries.
For additional information or a downloadable version of the user manual, please refer to the official documentation provided by the seller. A PDF version of the user manual is available here.