Your X3,
after dark.
A 2700K reading light, a spare battery, and a pogo-pin charger — in one hand-built magnetic dock. Raise the arm, flip the top switch, and the page lights up. Leave it closed and it is a power bank that happens to fit your reader perfectly.
Currently shipping about 18 days out. Every order is built by hand, so the queue moves at the speed of the bench.
One warm strip, seventy milliamps of range.
A single 2700K strip behind a diffuser, sitting above the screen rather than beside it. No colour modes, no app, no menu — a switch on the top edge and a trim pot that takes it from a candle to a desk lamp.
The potentiometer sweeps the 3V rail from 15mA to 85mA. Set it once for your room and leave it — the top switch just turns it on and off.
Raising the arm does not switch the light on. The light comes on when you flip the top switch, and not before — so you can position the arm in a lit room without burning any charge.
Easier to show than to describe.
Reading light is one of those things a photograph flatters. Here is what it actually looks like at the desk, at night, at the brightness you would really use.
Demo video coming soon
A short clip of the arm going up, the switch going on, and the page lighting up in a dark room.
Built like something you are allowed to open.
Brass heat-set inserts instead of glue. Screws instead of clips. Every part on the bill of materials is one you can buy again.
One for the light, one for the charge.
The top switch runs the light bar. The left-edge switch sends power out to the X3 through the pogo pins. The two circuits are isolated, so reading all night never touches the charge you were saving for your reader — and neither switch does anything until you flip it.
Red, then blue.
This is the LightCharge’s own battery filling over USB-C — not the X3’s. One LED, two states, no app. Glance at it from across the room and you know whether to unplug.
It lands where it should.
A magnetic ring pulls the X3 into position and four spring pins make the connection. No cable between the two, no fiddling in the dark.
Nothing hidden from you.
A 403281 or 503080 LiPo, a charge controller, a boost stage, and wire you can trace with your eyes. Every kit ships with the same schematic we build from.
Solder it in the jig, not in the case.
Every kit includes a simple 3D-printed jig with a pocket for each part. Lay the components out, solder the whole loom with an iron nowhere near the finished shell, then lift the completed assembly straight into the case.
- 1Lay out
Drop each component into its labelled pocket. The layout is the wiring diagram.
- 2Solder
Work in the jig. It is a sacrificial part — a slipped iron marks the jig, not your case.
- 3Transfer
Lift the finished assembly out and set it into the shell. No reflowing joints in a tight space.
You get the jig as an STL with the file-based tiers, or as a printed part in the box with the tiers that ship printed parts. Either way it is the same jig.
Buy the files, the parts, or the finished thing.
Five ways in, depending on how much of the build you want to do yourself. Every tier can drop the charger electronics if you only want the light, and every tier that involves a soldering iron includes the soldering jig.
Shipping to United States — change the region in the top bar. Postage is added at checkout, and Stripe will only accept an address inside the region you pick. Prices are set in US dollars; Stripe shows them in your own currency on the payment page.
Digital Files
Print it yourself, source it yourself.
Print-ready STL and 3MF files for the shell, light arm, and soldering jig, the full STEP model for remixing, and both bills of materials — Amazon and AliExpress — with every part linked.
Delivered by email as soon as payment clears. Nothing ships.
Electronics Kit + Files
We send the hard parts. You run the printer.
Every electronic component, pre-sorted and labelled: cell, charge board, LED strip, both switches, potentiometer, magnetic ring, pogo assembly, inserts and fasteners.
Includes the full digital file set — shell, light arm, and the soldering jig — so you can print in whatever colour and material you like.
Pogo pins, boost stage, and the left-edge switch for charging the X3.
Electronics + Printed Parts
Everything in the box. Bring a soldering iron.
The complete electronics kit plus a printed shell set, light arm, diffuser, and soldering jig from our own machines.
Solder the loom in the jig, drop it into the case. Ready to assemble in an evening, assembly guide included.
Pogo pins, boost stage, and the left-edge switch for charging the X3.
Premium Build
Professionally printed shells, finished by hand.
The same kit, with shells printed on production hardware in a textured matte finish, then deburred, inserted, and inspected before packing.
For the build you want to keep looking sharp.
Pogo pins, boost stage, and the left-edge switch for charging the X3.
Fully Assembled
Open the box. Flip the switch. Read.
Built, wired, calibrated, and burn-in tested by hand. Charge it once over USB-C and it is ready.
Every unit is checked on a real X3 before it is packed.
Pogo pins, boost stage, and the left-edge switch for charging the X3.
The battery, on its own.
Neither cell has a good Amazon equivalent, and sourcing one yourself is the least fun part of this build. So we stock them.
LiPo Cell · 403281
$9.503.7V ~1000mAh. The cell the shell is designed around.
Hard to source and with no Amazon equivalent, so we stock it. Ships with protection circuit and pre-tinned leads.
Cells on their own ship inside the US only. Every kit still arrives with one.
LiPo Cell · 503080
$11.503.7V ~1200mAh. More runtime, marginally thicker.
Drop-in alternate cell. Fits the same bay with a little more capacity for long reading sessions.
Cells on their own ship inside the US only. Every kit still arrives with one.
The whole sheet.
- Compatibility
- XTEINK X3
- Light source
- Diffused LED strip · 2700K warm white
- Brightness
- 15–85 mA on a 3V rail, continuous trim
- Cell
- 403281 or 503080 LiPo · 3.7V
- Input
- USB-C
- Output to X3
- 4-pin pogo connector, magnetically aligned
- Controls
- Top: light bar · Left: charge output to X3
- Indicator
- Internal cell over USB-C · red charging, blue charged
- Retention
- Magnetic alignment ring
- Shell
- 3D printed, textured matte · black or white
- Fasteners
- Brass heat-set inserts, M3 machine screws
- Assembly
- Printed soldering jig included — solder outside the case
- Files
- STL · 3MF · STEP — shell, arm, and jig
- Bill of materials
- Amazon and AliExpress sourcing lists
Same electronics, new shell geometry for the X4 body.
A crank deserves good light too. No promises yet.
One board instead of four modules. Thinner, cleaner, further out.