💻🔌 Dell PA‑1 Power Adapter
 
(18.5V DC • 3.5A • 65W • Rectangular 3‑Pin Dell Plug)

This adapter delivers 18.5V of regulated DC power for Dell’s early Latitude XPi notebooks. It uses a rectangular 3‑pin connector.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 18.5V DC @ 3.5A (65W)
Connector: Rectangular 3‑pin Dell plug
Common part numbers: PA‑1, 81407, ZVC65N‑18.5‑P10
OEM spec: Early Dell AC adapter for XPi series laptops
 
🖥️ Compatible Devices
🟦 Dell Latitude Series
Latitude XPi
Latitude XPi CD
Latitude XP
Latitude XPi P100SD
Latitude XPi P100T
Latitude XPi P120MHZ-133
Latitude P133ST
Latitude LXP
Latitude CD with MMX
 
✅ Common Uses
🔌 Powering Dell Latitude XPi notebooks
🧩 Replacing lost or damaged OEM PA‑1 adapters
🧪 Supporting legacy Dell laptop restoration and archival setups
🧵 Essential entry for Dell’s pre‑PA‑6 adapter lineage
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Regulated 18.5V DC, 3.5A
🔌 Connector: Rectangular 3‑pin Dell plug
🔁 Not interchangeable with PA‑6, PA‑9, or PA‑10 adapters (different voltage and connector)
 
⚠️ Things to Watch Out For
📉 Must be 18.5V — 19.5V adapters may damage XPi systems
🔌 Connector is rectangular 3‑pin — not compatible with barrel jacks
🧯 Always confirm “DC IN 18.5V” on the laptop label before connecting
📏 Limited wattage — not suitable for newer Dell laptops with higher power draw
 
🛠️ Quick Tips for Beginners
🔌 Confirm connector: rectangular 3‑pin, not barrel
🧪 If laptop won’t power on, inspect plug for bent pins or corrosion
🧯 Label clearly to avoid mix‑ups with PA‑6 or PA‑10 adapters
🧵 Keep this entry in your Dell legacy power catalog