DONGNI 65W 4.0×1.7mm Lenovo Laptop Charger 20V

DONGNI 65W (also compatible with 45W) replacement charger for many Lenovo V- and Ideapad series provides 20V 3.25A output with a 4.0×1.7mm connector for reliable charging.

Whether you need a spare for travel, a desktop backup, or a like-for-like replacement, this DONGNI power adapter is built to match the electrical and connector specifications of a long list of Lenovo laptops. It supports 100–240V input for worldwide use and includes compatibility notes and part numbers so you can confirm fit before buying.

Which Lenovo models will this DONGNI charger work with?

This adapter is designed for many Lenovo V-series, Ideapad, and Flex models. Check the listed model names and P/N codes to confirm compatibility with your laptop.

• V-series: V14, V15, V17 (including IAP, ITL, IIL, IWL, IKB variants)
• Ideapad: S145, S340, S530, S540, 310/320/330, 510/520/710 series and more
• Flex series: Flex 4, 5, 6 model variants including 1470 / 1570 / 14ALC / 15IIL
• Compatible P/N examples: ADL45WCC, ADLX45NCC3, PA-1450-55LL, GX20K02934

How do the power and connector specifications affect compatibility?

Compatibility depends on two important electrical details — output rating and connector size. This DONGNI adapter outputs 20V at 3.25A (65W), and it also supports devices requiring 20V 2.25A (45W). The connector is 4.0×1.7mm; laptops using different plug sizes will not fit.

• Output: 20V 3.25A (65W) — backward compatible with some 45W devices
• Input: 100–240V ~ 1.8A / 50–60Hz for global voltage ranges
• Connector: 4.0×1.7mm — not compatible with 3.5×1.35mm plugs
• Do not use with chargers rated 20W (5V 4A) or other mismatched outputs

What safety and build details should I expect from this replacement adapter?

The DONGNI charger follows common safety and usability features for laptop adapters. It’s engineered to provide consistent voltage under normal laptop loads and includes a standard detachable power cord for convenient storage or replacement.

• Standard AC input and detachable AC cord for travel flexibility
• Solid-barrel 4.0×1.7mm DC plug for a secure fit into the laptop jack
• Works with many factory part numbers listed for straightforward cross-reference
• Compact rectangular brick housing suitable for carrying with your laptop

How do I confirm this adapter is the right replacement before purchasing?

Compare your laptop’s required voltage, amperage, and plug size with the adapter specifications, and check your device’s original charger P/N if available. When in doubt, verify against the full list of supported model names and P/Ns included with the product.

• Check laptop label or original adapter for voltage and amperage (20V, 3.25A / 2.25A)
• Confirm connector dimension: 4.0×1.7mm — measure your existing plug if unsure
• Cross-reference listed P/N codes (e.g., ADL45WCC, PA-1450-55LL) for exact matches
• Review the model compatibility list (V14/V15/V17, Ideapad S-series, Flex 4/5/6)

Who is this product for? This DONGNI 65W/45W adapter is for Lenovo owners who need an exact or functionally compatible replacement: students, remote workers, IT departments, and travelers who use V-series, Ideapad, or Flex laptops that require a 20V barrel connector. If you rely on your laptop daily and want a compact, globally compatible spare that matches Lenovo part numbers, this charger is a practical option. Always verify the output rating and connector size against your device before ordering to ensure safe, reliable charging.