45W Laptop Charger for HP Laptop Computer, 19.5V 2.31A Smart Blue Tip Power Adapter
Quick take
This 45W HP laptop charger is built for laptops that use the HP Smart Blue barrel tip (4.5 x 3.0 mm). It delivers 19.5V power (45W class, 2.31A) and is designed for everyday use at home, school, or while traveling. The main catch is compatibility: it is not for USB-C charging, so double-check your laptop’s charging port and required tip before buying.
Pros and cons
Pros
- Designed for HP laptops with the Smart Blue (4.5 x 3.0 mm) connector style, including many Pavilion x360, Envy, EliteBook, ProBook, Chromebook, Spectre x360, Stream, and ZBook models.
- 19.5V output in the 45W range (2.31A), with input rated for 100-240V (useful for travel).
- Multi-protection system for overvoltage, overcurrent, short-circuiting, and internal overheating.
- Slim, lightweight design for carrying a second charger to work or on trips.
Cons
- Only works with laptops that accept the Smart Blue barrel tip, not USB-C charging ports.
- Wattage must match your laptop’s requirement, especially if your original charger was a higher-watt model.
- Compatibility lists are extensive, but you still need to verify your exact laptop model or compatible part number.
What buyers think
Buyer-review evidence is generally positive, with recurring themes that it powers HP laptops as expected, charges reliably, and is convenient to keep as a spare. Many people mention using it in a home-and-travel setup (for example, leaving one charger at work and one at home) and describe it as a practical, good-value replacement once an original charger is misplaced or wears out. Evidence is limited on deeper performance topics like thermals under heavy load, but the overall pattern supports day-to-day functionality and perceived usefulness as a secondary charger.
What this charger is, and who it’s for
This adapter is a barrel-tip laptop charger intended for HP models that use the Smart Blue connector (4.5 x 3.0 mm). If your current charger has the same tip style, this is the category of replacement you are looking for when you want an extra unit for commuting, backup at home, or a like-for-like swap.
It’s a good fit for:
- HP laptop owners who specifically need a Smart Blue tip replacement charger
- People who want a second charger for work, school, or travel
- Users who prefer a slim, carry-friendly power brick and cable setup
Key specifications that matter
These are the details that usually determine compatibility and safe operation:
- Output: 19.5V at up to 3.33A (65W listed), with backward compatibility to 19.5V 2.31A (45W class)
- Max power class: 45W (19.5V 2.31A) in the configuration you’re targeting
- Input: 100-240V, 50-60Hz (helps if you travel between regions)
- Connector type: Smart Blue barrel tip (4.5 x 3.0 mm). Not USB-C.
- Protection: multi-protection against overvoltage, overcurrent, short-circuiting, and overheating
Pros and cons in plain English
When it’s a straightforward buy
- Your HP laptop charges from a Smart Blue barrel tip (4.5 x 3.0 mm), and you want 19.5V power in the 45W range.
- You want a backup charger to avoid downtime when a charger gets left behind.
When to pause before ordering
- If your laptop charges via USB-C, this won’t be the right category of charger.
- If your original charger’s wattage and tip style do not align with what this unit supports, you should verify compatibility first (battery health and device behavior can vary when a charger is mismatched).
Compatibility checklist before you buy
To reduce the chance of buying the wrong adapter, confirm:
- Port and tip: Smart Blue barrel tip (4.5 x 3.0 mm), not USB-C.
- Voltage: 19.5V is the required output class for many supported HP models.
- Wattage: you’re targeting the 45W (19.5V 2.31A) replacement use case.
- Model or part number: if you have the original HP charger part number, compare it to the compatible part-number list.
Is the 45W rating enough?
For many HP laptops in this connector class, 45W is the correct power level. The charger supports backward compatibility for the 19.5V 2.31A (45W) scenario, which is what matters if your laptop is expecting that output. If your laptop’s original charger is higher-watt, double-check requirements so you choose a charger that matches your device’s needs.
Verdict
This is a practical, travel-friendly HP-compatible charger choice for anyone whose laptop uses the Smart Blue (4.5 x 3.0 mm) barrel tip and needs a 19.5V 45W class replacement or secondary charger. The biggest buying caveat is not the electrical specs, it’s connector and wattage matching. If those check out, it lines up well with the most common buyer use case: keeping a spare so your laptop is always ready.
FAQs
Is this charger compatible with USB-C HP laptops?
No. This charger is intended for HP laptops that use the Smart Blue barrel tip connector, and it is not for USB-C ports.
What output voltage does it provide?
It provides 19.5V output, designed for the 45W class (backward compatible with 19.5V 2.31A) use case.
Will it work as a spare charger for travel?
Yes. It’s designed with a lightweight, slim build and an input voltage range of 100-240V, which can be helpful when traveling (assuming your power outlet type and region wiring are compatible).
What should I check to make sure it fits my exact HP model?
Confirm the charging port uses the Smart Blue (4.5 x 3.0 mm) barrel tip, then verify your laptop’s required voltage and wattage class (the 45W target here). If you have the original HP charger part number, cross-check it against the compatible part-number list.
Does it include safety protections?
Yes. It lists a multi-protection system for overvoltage, overcurrent, short-circuiting, and internal overheating.
Specifications
| Product Title | 45W Laptop Charger for HP Laptop Computer,19.5V 2.31A Smart Blue Tip Power Adapter for HP Pavilion x360,Envy 11 13 15,EliteBook 840 G3 G5,Chromebook,Spectre,Stream 11 13 14 ProBook Notebook AC Adapter |
|---|---|
| Category | Electronics > Computers & Accessories > Laptop Accessories > Chargers & Adapters |
| Brand | S SKSTYLE |
| Manufacturer | DongGuan Simer Electronics Co., LTD (S SKSTYLE) |
| Model Number | SK90A195231 |
| Item Weight | 0.27 Kilograms |
| Color | Black |
| Connector Type | 3-Pin |
| Compatible Devices | Laptops |
| Compatible Phone Models | Compatibility with ALL HP laptops 15 Notebook, pavilion x360, stream, Spectre x360, EliteBook, Chromebook laptops with BLUE tip power connector. |
| Additional Features | Travel |
| Input Voltage | 240 Volts |
| Amperage | 20 Amps |
| Wattage | 45 watts |
| Output Current | 2.31 Amps |
| Output Voltage | 19.5 Volts |
| Power Source | Corded Electric |
| Current Rating | 2.31 Amps |
| Frequency Range | 60 hertz |
| Main Power Connector Type | 3 Pin |
| Portable | Yes |
| Number of Power Levels | 1 |
| Power Plug | Type A - 2 pin (North American) |
| Voltage | 20 Volts |
| Current | DC |
| Compatible Power Plug Type | Type A - 2 pin (North American) |
| Mounting Type | Wall Mount |
Recommended next
140W Charger for MacBook Pro 16 14 inch Mac Air 15 13 inch 2026 2025 2024 23 22 21 M1–M5 (Type C to Magnetic 3)
A 140W USB-C power adapter paired with a Type C to Magnetic 3 cable, built for 2021 to 2026 MacBook Pro and MacBook Air models. Review themes highlight fast, reliable charging and a secure magnetic connection for everyday use and travel, with a compatibility caveat for some M1-era behavior when the battery reaches full.
Anker MacBook Pro Charger,140W Max 4-Port GaN USB C Charger Block with Smart Display
A compact, high-watt GaN charger designed to run a MacBook-class laptop and multiple USB-C devices from one block. The standout features are its smart color display, temperature monitoring, and power-splitting modes across four ports, with a few compatibility and maximum-output caveats when ports share power.
Replacement 65W USB C Laptop Charger Compatible with HP Chromebook and All 65W USB Type C Power Adapter
A budget-friendly 65W USB-C charger built for HP Chromebook and a wide set of USB-C laptops and 2-in-1s. It delivers the basics buyers want (fast-charge support for compatible devices, a firm USB-C connection, and a solid cable), with the main caveat being that touchscreen behavior and physical durability can be less ideal in more demanding use (especially around kids or frequent cord pulls).
Dell 65W USB-C Laptop Charger for XPS and Latitude 5000
A 65W Dell OEM USB-C charger designed for select XPS, Latitude, and Chromebook models, with a power cord included. It’s a straightforward replacement option, but buyer-fit depends heavily on matching your exact Dell laptop model and port/power needs.