NEXAS NL101 OBD2 Scanner with Battery Tester - Simple Car Diagnostics

In this review the NEXAS NL101 is presented as a practical, budget-friendly diagnostic tool for drivers and DIY mechanics who need clear fault codes and quick battery checks. Its single biggest reason to buy is the combination of a dedicated OBD2 code reader and a battery tester in one handheld unit, which makes routine troubleshooting and pre-inspection checks faster and more convenient than carrying separate tools. For anyone wanting to find and clear a check engine light or confirm battery and charging health before a trip, the NL101 delivers consistent, straightforward results.

Key Features

• 10 OBD2 Modes: Provides quick access to engine fault codes, freeze frame data and live data so users can see the conditions that triggered a fault.
• DTC Query Library: Supplies fault analysis and inspection suggestions to help diagnose why the check engine light is on without needing external references.
• I/M Readiness: Checks emissions readiness to help determine if a vehicle is prepared for annual smog or inspection tests.
• Integrated Battery Tester: Tests 6V and 12V batteries and compares voltage before and after ignition to assess starting and charging performance.
• 2.4 in Color Screen: Shows live parameters in text and graphical form, making engine speed, intake temperature and other sensors easier to read.
• No Subscription Fees: Full functionality out of the box with lifetime free software upgrades via USB and a protective case included.

Who It's For

The NL101 is well suited for car owners, weekend mechanics and small shop technicians who need a reliable, no-frills tool to read and clear codes and to verify battery condition without subscription costs. It is particularly useful for those preparing a vehicle for inspection or performing basic diagnostic checks before paying for professional service.

Those who need advanced system coverage beyond generic OBD2 engines, bi-directional controls, or brand-specific programming should look at factory-level diagnostic tools instead. Also, if a user requires a very large color display or wireless connectivity, a different model with those features would be a better fit.

Pros & Cons

Pros

• Combines an OBD2 code reader and a battery tester so you can diagnose engine codes and check battery health with one device.
• Intuitive 2.4 in color screen that displays live data and freeze frames for clearer troubleshooting.
• Good vehicle coverage for US, most Asian and European models and lifetime free software updates via USB.
• Includes a protective case to keep the unit safe when stored in a toolbox.

Cons

• The user manual receives mixed feedback, so some buyers may need extra time to learn all features.
• Does not replace advanced dealer-level diagnostics for non-OBD2 or manufacturer-specific systems.

Specifications

Brand	NEXAS
Functions	Read/clear engine codes, live data, freeze frame, I/M readiness, battery tester
Screen	2.4 in color display
Battery Test	6V and 12V battery voltage before and after ignition
Compatibility	US vehicles since 1996; Asian since 2006; European since 2002 (covers most brands)
Connectivity	USB for PC connection and free software updates
Extras	Protective carrying case included

Our Verdict

The NEXAS NL101 is a practical, cost-effective tool for owners and DIYers who want dependable OBD2 diagnostics plus a built-in battery tester. It covers the essentials well, displays live data clearly on its color screen, and avoids subscription fees, making it a solid value for routine troubleshooting and pre-inspection checks.

Frequently Asked Questions

Will this work on my car?
The NL101 supports US vehicles since 1996, most Asian models after 2006 and European models after 2002, so it covers the vast majority of passenger cars, SUVs and light trucks.

Do I need to pay to get updates?
No, firmware and software updates are provided free via USB, so the unit can receive added parameters and improvements without subscription fees.

Can it test batteries?
Yes, it tests 6V and 12V batteries and compares voltage before and after ignition to help identify starting or charging issues.