🔋💻 Lenovo Slim‑Tip 170W Laptop Charger
 
(20V 8.5A AC Adapter • 170W • Rectangular Yellow Slim‑Tip w/Center Pin)

This high‑capacity AC adapter delivers 170W of regulated DC power to Lenovo laptops using the slim‑tip connector. It’s the standard supply for workstation‑class ThinkPads, X1 Extreme, and Legion gaming laptops that demand more power than the 65W or 90W bricks can provide.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 20V DC, 8.5A (170W)
Connector: Rectangular yellow slim‑tip with center pin
Inline power brick with detachable AC cord
Smart chip communicates wattage to laptop firmware
 
🖥️ Compatible Devices
🧳 ThinkPad Workstations: P50, P51, P52, P53; P70, P71, P72, P73; P15, P15v, P16, P16v; W540, W541, W550s (late W‑series)
💼 ThinkPad Performance Models: T15p, X1 Extreme (Gen 1–3, slim‑tip versions)
🎮 Lenovo Legion Gaming: Y520, Y530, Y540; Y545, Y7000, Y720, Y730; Legion 5/5i Slim (slim‑tip configs)
📘 IdeaPad / Yoga High‑Performance: IdeaPad Pro 5 (select configs), Yoga Pro 9i (slim‑tip versions before USB‑C PD transition)
 
✅ Common Uses
🔌 Powering workstation‑class ThinkPads and gaming laptops
🧩 Replacing lost or damaged OEM 170W adapters
🏢 Standardizing spares for IT support of P‑series fleets
🎒 Keeping as a dedicated travel adapter for high‑power systems
🧪 Testing Lenovo laptops with a known‑good 170W supply
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Regulated 20V DC, 170W max
🔑 Center pin ensures proper wattage recognition and safe charging
🔌 Supports both charging and direct power operation
🔁 Backward compatible with 65W/90W laptops (safe, but over‑spec’d)
 
⚠️ Things to Watch Out For
📉 Using a lower‑wattage adapter (65W/90W) on these laptops may cause throttling or prevent charging
🔌 Connector must match — not interchangeable with USB‑C or older round‑barrel plugs
🧯 Avoid third‑party clones without smart chip — workstation 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 wattage
🔌 Use only with laptops rated for 170W slim‑tip input
🧪 If laptop reports “adapter not recognized,” inspect center pin and cable integrity
🧯 Label adapters clearly to avoid mix‑ups with 65W/90W slim‑tip chargers
🧵 Keep one at desk and one in travel bag for convenience