🔋💻 HP 19.5V Bullet-Head 90W Laptop Charger
 
(19V 4.74A AC Adapter • 90W • 4.8 mm × 1.7 mm Tapered Barrel Connector • No Center Pin)

This classic AC adapter delivers 90W of regulated DC power to HP laptops using the long, tapered 4.8 mm × 1.7 mm barrel connector. Known as the “bullet head,” it was HP’s standard for mid‑range and business systems before the smart-pin and blue-tip eras.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 19V DC, 4.74A (90W)
Connector: 4.8 mm outer / 1.7 mm inner barrel, tapered tip, no center pin
Inline power brick with detachable AC cord
Common part numbers: 391172-001, 384023-001, PPP009L, PA-1900-08HT, ED494AA, ED495AA
 
🖥️ Compatible Devices
🟨 HP Business Notebook Series
n4000, n4010, n4100, n4200
nx6100, nx6110, nx6120, nx6130
nx9000, nx9010, nx9020
mx6105, mx6125
nc6000, nc6100, nc6200
nw8000, nw8240
🟨 HP Pavilion Series
ZT1000, ZT3000, ZT3300
DV1000, DV2000, DV4000
ZE2000, ZE4900
G4, G6, G7
M4, M6
🟨 HP Compaq Presario Series
V2000, V5000
CQ40, CQ41, CQ42, CQ43, CQ45
CQ50, CQ56, CQ57, CQ58
CQ60, CQ61, CQ62
🟨 HP ProBook Series
4430s, 4440s, 4530s, 4540s
6450b, 6470b, 6550b, 6560b, 6570b
🟨 HP EliteBook Series
2540p, 2560p, 2570p
2730p, 2740p
8440p, 8460p, 8470p
8540p, 8560p
8460w, 8570w, 8760w
 
✅ Common Uses
🔌 Powering HP laptops with discrete GPUs and 14–17" displays
🧩 Replacing lost or damaged OEM 90W bullet-head adapters
🏢 Standardizing spares for legacy HP fleets
🎒 Keeping as a travel adapter for older systems
🧪 Testing HP laptops with a known‑good 90W supply
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Regulated 19V DC, 90W max
🔌 No center pin — relies on barrel contact only
🔁 Backward compatible with 65W HP laptops (safe, charges faster)
 
⚠️ Things to Watch Out For
📉 Not suitable for HP smart-pin or USB‑C powered laptops
🔌 Connector must match — not interchangeable with 7.4 mm or 4.5 mm barrels
🧯 Avoid third‑party clones with poor contact — may cause intermittent charging
🌀 Excess heat or frayed cables can cause power dropouts
🧪 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 90W and 4.8 mm × 1.7 mm input
🧪 If laptop reports “adapter not recognized,” inspect barrel contact and cable integrity
🧯 Label adapters clearly to avoid mix‑ups with smart-pin or blue-tip chargers
🧵 Keep one at desk and one in travel bag for convenience