{"product_id":"foxwell-bt705plus-car-battery-tester-12v-24v-load-alternator-tester-2-8-color-display-long-leads","title":"FOXWELL BT705Plus Car Battery Tester 12V\/24V Load \u0026 Alternator Tester — 2.8\" Colour Display, Long Leads","description":"\u003cp\u003e\u003cstrong\u003eThe FOXWELL BT705Plus is a handheld automotive tester that quickly assesses 12V batteries and 12V\/24V charging and cranking systems to reveal weak batteries, starter issues, and alternator problems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eCompact and engineered for both professionals and DIYers, the BT705Plus blends faster processing and refined algorithms to return more reliable results, even on low-voltage or nearly depleted batteries. Its 2.8\" color display, extended test leads, and multi-mode diagnostics let you run battery health checks, cranking assessments, and charging inspections without guesswork. The tool supports flooded, AGM, spiral-wound, and GEL battery chemistries (not compatible with lithium) and works across passenger cars, trucks, RVs, boats, and heavy equipment.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the BT705Plus identify a weak battery?\u003c\/h3\u003e\n\u003cp\u003eThe BT705Plus runs a targeted battery test that calculates state of health (SOH) and state of charge (SOC) using measured voltage and internal resistance under load. It compares results against the battery's rated CCA to classify the battery’s condition and recommend actions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEnter the battery's rated CCA from the label for accurate comparison\u003c\/li\u003e\n  \u003cli\u003eDisplays SOH and SOC and a clear pass\/fail-style status\u003c\/li\u003e\n  \u003cli\u003eWorks with flooded, AGM, spiral, and GEL types (no lithium support)\u003c\/li\u003e\n  \u003cli\u003eLarger readings available even for low-voltage or nearly dead batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan it test starting performance and measure cranking?\u003c\/h3\u003e\n\u003cp\u003eYes—the BT705Plus performs cranking tests that record cranking voltage and cranking time to help pinpoint starter or battery-related starting problems. Run the test while cranking the engine to capture real-world starting behavior.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeasures cranking voltage and duration to reveal weak starts\u003c\/li\u003e\n  \u003cli\u003eUse long 5.9 ft cables to test from the driver’s seat safely\u003c\/li\u003e\n  \u003cli\u003eIdeal for detecting intermittent starting issues before a roadside failure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the device check alternator and charging systems?\u003c\/h3\u003e\n\u003cp\u003eThe charging test inspects charging voltage and monitors alternator ripple to surface regulator or diode faults and unstable charging. Results show whether the charging system maintains correct voltage and whether ripple levels are within acceptable limits.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerforms 12V and 24V charging system checks on many vehicle types\u003c\/li\u003e\n  \u003cli\u003eReports charging voltage and ripple to indicate alternator health\u003c\/li\u003e\n  \u003cli\u003eRecommends tests be done with accessories off and ignition OFF for accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the BT705Plus easier to use than basic testers?\u003c\/h3\u003e\n\u003cp\u003eThe unit’s faster processor and tuned algorithms produce results up to 30% quicker than its predecessor while the large color screen shows multi-value diagnostics at a glance. Rugged, high-conductivity clamps and long cables let one person safely perform all tests without assistance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBright 2.8\" color LCD for clear outdoor and indoor visibility\u003c\/li\u003e\n  \u003cli\u003eExtra-long 5.9 ft cables permit in-seat testing of cranking and charging\u003c\/li\u003e\n  \u003cli\u003eStorage box included for safe transport and workshop organization\u003c\/li\u003e\n  \u003cli\u003eGRS-certified manufacturing for responsible production practices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Mechanics, fleet managers, and hands-on vehicle owners who want a professional-grade, portable diagnostics tool that covers battery health, cranking performance, and charging system integrity. It’s particularly useful for workshops, roadside technicians, and anyone who wants to detect battery or alternator problems early—reducing unexpected breakdowns and unnecessary replacements. Note: the BT705Plus diagnoses systems but does not charge batteries and is not an OBD2 code reader; always enter the battery’s rated CCA and follow test setup steps for consistent results.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the BT705Plus charge batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The BT705Plus diagnoses battery, cranking, and charging systems but does not recharge batteries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which battery chemistries does it support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports flooded, AGM, spiral, and GEL batteries; it is not compatible with lithium batteries.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FOXWELL","offers":[{"title":"Default Title","offer_id":55170618622295,"sku":"B0D59V9DFN","price":240.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/foxwell-front-panel.jpg?v=1790431878","url":"https:\/\/britishgarage.co.uk\/products\/foxwell-bt705plus-car-battery-tester-12v-24v-load-alternator-tester-2-8-color-display-long-leads","provider":"British Garage","version":"1.0","type":"link"}