Portable Outdoor Lantern

Portable Outdoor Lighting

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This product has applied for a utility model patent and is only permitted for personal DIY/replication

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• Suitable for wide-area outdoor illumination; hand-held or magnetically attachable;
• Single Type-C port, maximum 140W charging; pressing the power switch triggers maximum 140W reverse charging;
• Floodlight illumination power: 30W, maximum 20000 lumens;
• 1.4-inch TFT color screen + button operation, stepless brightness adjustment;
• In outdoor nighttime scenarios with no signal, multiple devices can use BLE broadcast to form a team;
• Joining a team displays member distance, allows simple message sending and receiving, and remote control of strobe lighting

Finished Product Showcase:

Technical Specifications
1 High-rate power battery Equivalent capacity: 12800mAh (18650 + bracket) / 20000mAh (21700 spot welding)
2 Fast charging protocols: AFC/FCP/PD2.0/ PD3.0/PD3.1, maximum charge and discharge power 100W (only 21700 Samsung 50G configuration is 140W)
3 Onboard 3-way battery NTC temperature detection, intelligent charging current adjustment
4 Illumination performance: 30W COB light board, stepless brightness adjustment
5 Equipped with a 1.4-inch TFT color screen, dual-button operation
6 Outdoor team function
Communication method: BLE 5.2 
Communication distance: 1km in open outdoor areas
Supports team creation/joining, member search (distance), simple message sending and receiving, remote control strobe, etc, usable in offline environments

Typical operating temperature -20℃～70℃
ESD level Electrostatic discharge rating (withstands 4KV contact, 8KV air)
Product dimensions Approximately 190mmx38mmx34mm
Product weight 370g (18650 battery version) 450g (21700 Samsung 50G version)

Actual Illumination Effects:

Night Hike · Hangzhou Taizi Peak · Unlit Mountain Road

Outdoor Camping · Unlit Mountain Area

Fast Charging Performance Demonstration (actually 140W version, meter does not support 28V PD, so only 100W emark line test used)

Discharge Performance Demonstration (actually 140W version, meter does not support 28V PD, so only 100W emark line test used)

Low-power discharge - Lenovo tablet 27W PPS

Low-power charging - large desk lamp base (to be open-sourced) 65W PD

Assembly Instructions/Process:

Materials Required:

Mainboard PCBA 1 set (Gerber and BOM provided for replication, will be available for purchase soon)

Kavter K704 thermal conductive adhesive 1 tube

T9000 epoxy resin adhesive 1 tube

18650/21700 battery cells 4 pieces (21700 requires spot welding)

M3*17+3mm copper pillar screws 4 pieces

M3*8 countersunk screws 4 pieces 

N52 6*6*6mm strong magnets 6 pieces

18640-10B10C COB light board 1 piece

1.5mm acrylic custom part 1 piece (see DXF)

1mm 6061 aluminum alloy custom part 1 piece (see DXF, can also be printed)

Silicone wire several

To ensure strength, it is recommended to use ABS or higher strength engineering plastics for printing

-1. Self-solder PCB/purchase PCBA, open-source version number is v1.0.1f Note that the longer size may make prototyping slightly more expensive.

0. Print all models; the main housing requires inserting 6 N52 6*6*6mm strong magnets at the pause layer before continuing printing.

1. Spot weld the 21700 battery pack as shown, welding to the back of the PCB **(18650 can be installed with a bracket, no spot welding required),** When welding, note that the positive and negative nickel strips are close after spot welding, be careful to prevent short circuits!!!

Burn the ESP32-C3 firmware, power on to verify fast charging/battery protection/power monitoring.

2. Connect the light board using silicone wire (test the boost LED driver), place the two printed button parts into the main housing, screw in the copper pillar screws, fill with K704 thermal conductive adhesive, and fix the 3380 NTC resistor to the inside of the battery.

4. Remove the custom acrylic plate, inject T9000 above the screen, eliminate air bubbles, and wait for the epoxy resin to solidify.

(Due to the properties of the adhesive, there will be severe screen display anomalies within 1-2 days after injection, including black screen, screen flickering, and LVGL rendering errors. These will disappear after the adhesive fully cures.)

5. Fill the battery area with K704 adhesive and install the aluminum plate

6. Lightly apply a layer of K704, fix the light board and wait for curing

7. After initial solidification, remove excess thermal conductive adhesive

Installation is now complete. Note that the open-source firmware only implements lighting/monitoring/low-power/OTA functions

Appendix - Production File Description 1 Gerber_PCB1_3_2025-05-01 PCB production file, information as follows, board thickness = 1.6mm

Appendix - Production File Description 2 InteractiveBOM_PCB1_3_2025-5-1 Interactive BOM, extract the html and open it with a browser

Appendix - Production File Description 3 Sketch 23 Acrylic plate cutting DXF Thickness = 1.5mm / 2.0mm

Appendix - Production File Description 3 Sketch 24 Aluminum plate cutting DXF Thickness = 1.0mm, screw holes should be chamfered if possible, chamfer diameter = 5.2mm 45°