45W Lenovo IdeaPad laptop charger (Non-Original) with 4.0 x 1.7mm connector
Product description
The essentials
If you’ve lost the original PSU for your Lenovo IdeaPad or you’re trying to keep a spare for travel and everyday use, this 45W laptop charger is designed for that exact scenario. On paper it’s fairly straightforward: it takes mains input (100-240V AC, 50/60Hz) and outputs DC 20V at 2.25A, with a 45W maximum output.
The key point isn’t just the wattage. This charger claims to intelligently recognise the device to deliver power in a “fast and steady” way, and it also includes built-in protection via an IC chip. That sort of protection matters more than people think when you’re dealing with non-original adapters that are meant to run for hours at a time.
There’s also a practical detail: the connector size is stated as 4.0 x 1.7mm, which is often what makes or breaks compatibility. Get that wrong and no amount of “it should work” hope will save you.
What to know before buying
This is explicitly a non-original Lenovo charger, and the listing makes a couple of things worth noting. First, the model number printed on the product label is described as “for illustrative purposes”, and that the actual product you receive may vary. Second, the compatibility information is broad, but it also comes with clear exceptions (for example, it specifically says it’s NOT compatible with certain 100S-11IBY / 100S-11BY variants, and it flags that 710/other lines have condition-specific fit).
So, before you rely on it day-to-day, double-check:
- Your laptop’s required charger rating and the connector type (here: 4.0 x 1.7mm).
- That your exact Lenovo model appears in the compatibility list provided.
- Any “not compatible” exclusions mentioned in the listing.
It’s not a lot of fun to discover after purchase that your laptop’s pin size or exact model isn’t covered.
Tech specs (in plain English)
- Input: 100-240V AC, 50/60Hz
- Output: DC 20V 2.25A, 45W
- Connector size: 4.0 x 1.7mm
- Protections: built-in IC chip for overcurrent, voltage errors, short circuits, and overheating
- Certifications: CE / FCC / RoHS
The “recognises your device” wording and the protection claims are the kind of features that can help keep charging stable, but as always, real-world performance can still depend on whether you’ve matched the correct model and connector.
What stands out in everyday use
Where this charger feels most useful is in daily practicality. A 45W adapter is a common fit for many thinner IdeaPad-style setups, and having a spare means you’re not stuck when the bag gets set down in the wrong room—or when the cable is bent one too many times.
The cable is described as using high-density PC material aimed at better stability and wear resistance. It’s not a guarantee of immortality (nothing is), but it suggests the manufacturer is trying to reduce the common “brittle cable” problem you get with budget chargers.
Also, the listing includes a small expectation-setting point: it’s meant to deliver a steady charging flow and help maximise output at 45W, which is exactly what you want if you’re studying, browsing, or doing light work away from the desk.
Limitations and who should skip it
This charger is likely a mismatch if you’re not confident about the connector size or if your laptop model is one of the excluded variants mentioned in the listing. Since it’s a 45W / 20V 2.25A adapter with a specific 4.0 x 1.7mm connector, the wrong match can mean it won’t charge properly—or at all.
It may also not be the best choice if you’re expecting the “tank-like” feel of a premium OEM brick. The listing is more about protection and functional stability than about luxury materials, and you might find higher-end alternatives are a better fit if your charger is effectively a permanent fixture rather than a spare or occasional replacement.
Is it worth it?
A solid pick if you need a replacement or spare charger for a compatible Lenovo IdeaPad model listed here, and you’re happy to match the connector size (4.0 x 1.7mm) and the 45W / 20V 2.25A output requirement. It’s the kind of charger that makes sense for students, commuters, and anyone who tends to move laptops between home and work.
You may want to skip it if your laptop model sits in the “not compatible” group called out in the listing, or if you can’t confirm the connector size. In that case, the time spent troubleshooting isn’t worth it—choosing the correct charger upfront is usually the cheaper path.
Mini FAQ
What output does this charger provide?
It’s specified as DC 20V 2.25A, with a 45W output.
Does the charger have built-in safety protection?
The listing states there’s built-in IC chip technology for protection against overcurrent, voltage errors, short circuits, and overheating.
What connector size is it?
The connector size is listed as 4.0 x 1.7mm.
Is it an original Lenovo charger?
No, it’s described as a non-original Lenovo charger.
What’s in the box?
The listing includes 1 x 45W laptop charger and 1 x user manual.
Buying verdict
If you’re replacing a worn-out adapter or adding a spare for everyday life, this 45W Lenovo-compatible charger is worth considering—provided your exact Lenovo model is covered in the compatibility list and you match the 4.0 x 1.7mm connector. Just be careful with the explicit “not compatible” exclusions, because that’s the kind of detail that matters most with chargers like this.