FOXWELL 12V Car Battery Tester BT301 — Upgraded BT100 with 2.8" Color Screen and 6.5 ft Cable

Whether you’re a weekend mechanic, fleet owner, or DIY vehicle enthusiast, the BT301 gives fast pass/fail style information plus detailed metrics so you can decide whether a battery needs charging, reconditioning, or replacement. This upgraded model expands on the BT100 with a longer cable, a brighter color screen, and support for common 12V lead-acid chemistries used across cars, trucks, boats, ATVs and lawn equipment.

How does the BT301 tell me if a battery is still good?

The tester measures state-of-health (SOH), state-of-charge (SOC) and cold cranking amps (CCA) by applying a controlled load and reading voltage and current response. An intelligent processor interprets those readings and displays a clear result so you don’t need to guess about remaining life or performance.

• SOH and SOC readouts to assess remaining capacity and charge level
• CCA comparison to rated battery specifications for cold-start capability
• Fast load test that replicates real-world cranking conditions

Can it check my starter and alternator too?

Yes — the BT301 runs cranking tests to evaluate starter performance and performs charging system checks for alternator output and regulation. These checks identify weak cranking, voltage drops, or poor charging that can mimic battery failure.

• Cranking test measures voltage under starter load to reveal weak starters or bad connections
• Alternator test monitors voltage at idle and under load to detect under- or over-charging
• On-screen guidance helps interpret each result and suggests next steps

What vehicles and battery types work with the BT301?

The BT301 supports most 12V lead-acid battery types found in everyday vehicles and equipment, making it a versatile shop or garage tool. It is not designed for lithium chemistry batteries.

• Compatible with flooded (wet), AGM (flat & spiral), EFB and GEL 12V batteries
• Suitable for cars, SUVs, trucks, motorcycles, boats, RVs, ATVs, UTVs and lawn equipment
• Not for lithium batteries — confirm battery type before testing

How easy is it to use the BT301 during routine maintenance?

The BT301 is built for straightforward, single-operator testing: attach the heavy-duty clamps, follow on-screen prompts and read results on the bright 2.8" color display. A longer 6.5-foot cable lets you remain inside the vehicle while testing, improving safety and convenience.

• 6.5 ft cable gives flexible reach from the driver’s seat or cramped engine bays
• 2.8" color screen for clear daytime and low-light readability
• Reverse-polarity and insulated clamps for safe operation

Who is this for? The FOXWELL BT301 is ideal for home mechanics, professional technicians, fleet operators and anyone who needs fast, reliable battery and charging-system information without repeated shop visits. If you maintain multiple vehicles, manage seasonal equipment, or want a pre-trip diagnostic tool, the BT301 delivers shop-level diagnostics in a compact, durable package.