FOXWELL BT100 PRO 12V Car Battery Tester — 100–1100 CCA Load Tester, 2.4" Backlit Screen

The FOXWELL BT100 PRO is a compact, professional-grade 12V battery load tester that quickly reads CCA, SOH, SOC, voltage, and internal resistance to tell you whether a battery is good, needs recharging, or must be replaced.

Keep your vehicle from stalling with a fast, reliable battery check. The BT100 PRO uses conductance-based testing to deliver near-labor precision without complex setup. Lightweight and self-powered, it fits in a glove box and gives clear results on a bright 2.4" backlit LCD so car owners, mechanics, and roadside responders can make confident decisions about battery health before a trip or during routine maintenance.

How does the BT100 PRO measure battery condition?

The device uses advanced conductance technology to analyze a battery’s ability to deliver current under load, then calculates state-of-health (SOH), state-of-charge (SOC), cold cranking amps (CCA), voltage, and internal resistance. These combined metrics provide a practical picture of a 12V battery’s real-world performance.

• Conductance testing for accurate CCA and internal resistance readings
• Displays SOH and SOC to gauge remaining service life and charge level
• Supports flooded, AGM, EFB, and GEL 12V batteries
• Outputs straightforward statuses: GOOD, RECHARGE, REPLACE, BAD CELL

Is the BT100 PRO easy and safe to use for non-experts?

Yes — the BT100 PRO is designed for simple, safe operation. Attach the heavy-duty clamps, power up, pick the battery type if needed, and read results on the large backlit screen. Built-in protections reduce user risk and the tester needs no internal batteries.

• Self-powered from the tested battery — no separate batteries required
• Reverse polarity, overcurrent, and short-circuit safeguards
• Bright 2.4" display readable in sunlight or low light
• Compact form factor stores easily in glove compartments or toolkits

Will it work reliably in extreme temperatures and different vehicle types?

The BT100 PRO is engineered to deliver consistent readings across a wide temperature range, using automatic temperature compensation so users get dependable results in hot summers and freezing winters. It covers most 12V automotive batteries, including modern AGM and EFB types found in start-stop and high-electrical-load vehicles.

• Automatic temperature compensation for accurate results in varied climates
• Compatible with standard flooded, AGM, EFB, and GEL 12V batteries
• Premium copper clamps for secure conduction and reduced contact resistance
• Durable ABS housing resists impact and corrosion for workshop use

Who is this for? The FOXWELL BT100 PRO suits anyone who wants fast, reliable battery intelligence: everyday drivers preparing for trips, fleet managers tracking battery health, DIY mechanics performing pre-season checks, and roadside professionals who need an easy, accurate tester. Backed by FOXWELL’s automotive diagnostic experience, it’s a practical tool for preventing unexpected battery failures and planning timely recharges or replacements.