🔋💻 HP 19V 135W Laptop Charger
 
(19V 7.1A AC Adapter • 135W • 5.5 mm × 2.5 mm Barrel Connector • No Center Pin)

This high‑capacity AC adapter delivers 135W of regulated DC power to HP laptops using the 5.5 mm × 2.5 mm barrel connector. It was the standard supply for HP’s mobile workstations, desktop replacements, and high‑performance business laptops from the early 2000s through the early 2010s.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 19V DC, 7.1A (135W)
Connector: 5.5 mm outer / 2.5 mm inner barrel, no center pin
Inline power brick with detachable AC cord
Common model numbers:
346958-001
345312-001
PA-1131-08H
397747-001
Also cross-compatible: 397803-001, 592491-001, HSTNN-LA01, HSTNN-HA01
 
🖥️ Compatible Devices
🟨 HP Compaq Business Series
nx9105, nx9110, nx9600
nc6000, nc8000, nc8230
nc4400, nc6110, nc6120, nc6300
nw8000, nw8240, nw9440
🟨 HP Pavilion / Presario (high-power configs)
Pavilion zd7000, zd8000
Presario R3000, R4000, X1000
🟨 HP Mobile Workstations
HP Compaq 8510p, 8510w
HP Compaq 8710p, 8710w
HP EliteBook 8530p, 8530w
HP EliteBook 8730p, 8730w
🟨 HP ZBook (early barrel input models)
ZBook 15 G1, G2
ZBook 17 G1, G2
🟨 HP Desktop Replacements / Tablet PCs
Elite 8300 Ultra-Slim Desktop
TC4400 Tablet PC
 
✅ Common Uses
🔌 Powering HP laptops with discrete GPUs and large displays
🧩 Replacing lost or damaged OEM 135W adapters
🏢 Standardizing spares for legacy workstation fleets
🎒 Keeping as a dedicated travel adapter for high‑power systems
🧪 Testing HP laptops with a known‑good 135W supply
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Regulated 19V DC, 135W max
🔌 No center pin — relies on barrel contact only
🔁 Backward compatible with 90W HP laptops (safe, charges faster)
 
⚠️ Things to Watch Out For
📉 Using a lower‑wattage adapter (65W or 90W) on these laptops may cause throttling or prevent charging
🔌 Connector must match — not interchangeable with HP’s 4.5 mm × 3.0 mm blue‑tip barrel or USB‑C
🧯 Avoid third‑party clones with poor contact — high‑performance models may reject them
🌀 Excess heat or frayed cables can cause intermittent charging
🧪 Always confirm laptop’s required wattage before swapping adapters
 
🛠️ Quick Tips for Beginners
🧭 Check underside of laptop or original charger for voltage and connector size
🔌 Use only with laptops rated for 135W and 5.5 mm × 2.5 mm input
🧪 If laptop reports “adapter not recognized,” inspect barrel contact and cable integrity
🧯 Label adapters clearly to avoid mix‑ups with lower‑wattage HP chargers
🧵 Keep one at desk and one in travel bag for convenience