⚡💅 29.4V 2A Nail Lamp Adapter
 
(Single Output • +29.4V 2A • 5.5 mm × 2.5 mm Barrel Plug)

This AC adapter delivers 29.4V DC at 2A through a standard large‑barrel connector. It’s the typical supply for high‑power LED nail curing lamps and select salon dryers that run on 24V lithium (7S) internals charged to 29.4V. The 5.5 mm × 2.5 mm plug is larger than the common 2.1 mm type, ensuring a snug fit and preventing accidental interchange.
 
🔧 Charger form
Input: 100–240V AC, 50/60Hz
Output: +29.4V DC @ 2A (≈59 W)
Connector: Barrel 5.5 mm outer × 2.5 mm inner, center‑positive (typical)
Cable: Fixed DC lead, detachable AC cord (IEC C7/C8 common)
Notes: Often labeled “29.4V,” “29.5V,” or “30V” for the same 7S Li‑ion profile
 
🖥️ Compatible devices
💅 Nail lamps and salon dryers
OPI GelColor LED Light GC900 series
DND LED Light Nail Lamp (Model BX‑2942000 and related)
Generic/pro‑grade LED nail dryers that specify 29–30V, 2A and 5.5×2.5 mm barrel
Select salon desk lamps and curing hoods using 7S lithium charge profile
🔋 Other 7S lithium devices (occasional)
Compact tools or fixtures designed for 29.4V charging with 5.5×2.5 mm jack
Note: Most scooters/hoverboards use different connectors; this spec is primarily a nail‑lamp standard
 
✅ Common uses
Powering and charging LED nail curing lamps
Replacing lost or damaged OEM adapters
Bench testing salon devices that require 29.4V input
 
🧠 Signal format
Input: Universal AC (100–240V)
Output: Single DC rail (29.4V only)
Plug: 5.5 mm × 2.5 mm barrel, keyed by size, center‑positive typical
No data — power only
 
⚠️ Things to watch out for
Not interchangeable with 24V (29.4V full charge) or 36V (42V full charge) systems
Verify barrel size: 2.5 mm ID is larger than 2.1 mm and won’t fit smaller jacks
Confirm polarity: most are center‑positive, but check the lamp’s label
Avoid using with scooters/e‑bikes unless the device explicitly specifies 29.4V and 5.5×2.5 mm barrel
 
🛠️ Quick tips for beginners
Match three things: voltage (29.4V), current (≥2A), and barrel size (5.5×2.5 mm)
If the lamp intermittently shuts off, check for loose barrel fit or a worn jack
Label clearly to avoid mix‑ups with 24V or 42V chargers
Treat this as the “pro LED nail lamp” adapter in your collection