The FNIRSI BTM-24 is an advanced yet extremely easy-to-use 12V and 24V battery tester that replaces several diagnostic tools. In a single measurement, you can check the voltage, starting current up to 2000A CCA, state of charge (SOC), state of health (SOH), internal resistance, and the correct operation of the alternator and charging system. It's a quick, clear answer to the question:is the battery working properly, or is it nearing the end of its life?
Dim lights, starting problems, or random electronic errors are the first warning signs. FNIRSI BTM-24 eliminates guesswork – it clearly shows whether the problem is with the battery, alternator, or installation. This allows you to avoid costly "blind" repairs and replacement of functional components.
The device uses a non-destructive diagnostic method, which means that the battery is not loaded during the test. Simply select the battery standard and start the measurement with one click. The result is presented in the form of a clear GOOD / CHARGE / BAD rating along with precise technical parameters – you know exactly what to do next.
The One-Tap Cranking Test function records the voltage drop in real time during engine start-up. The tester immediately informs you whether the start-up is within the normal range (>9.6V) or signals a problem. It is an indispensable tool for diagnosing weak batteries and problems with the starting system.
The BTM-24 monitors dynamic, minimum, and maximum charging voltage, showing how the system responds to changes in engine speed and the activation of receivers. A graphical voltage waveform graph allows you to assess the condition of the alternator, voltage regulator, and cables at a glance—no guesswork and no trip to the service station.
The tester supports 6 battery standards: CCA, EN, DIN, IEC, JIS, and GB, as well as AGM (flat and spiral), GEL, EFB, and classic lead-acid batteries. It works well in passenger cars, motorcycles, ATVs, boats, delivery vehicles, trucks, company fleets, and golf carts – both inside and outside the vehicle.
The 2.4" color TFT display with day and night modes ensures excellent readability in all conditions. The simple menu guides the user step by step, so the device can be easily used by mechanics, novice drivers, and used car buyers alike.
Robust, insulated crocodile clips with a wide grip range ensure a secure connection to the terminals. Built-in reverse polarity and overvoltage protection protects the battery, vehicle electronics, and the device itself – test without stress or risk.
The FNIRSI BTM-24 has an integrated, tear-resistant cable, 61-centimeter clamps, a foldable stand, and a hanging hole. The set includes a tester, instructions, a data cable, and a practical case, so the device is always safe, mobile, and ready to use.
It is the perfect tool for mechanics, workshops, DIY enthusiasts, new drivers, company fleets, and used car buyers. One tester that gives you confidence, saves you money, and allows you to make decisions based on facts, not assumptions.
| Manufacturer | FNIRSI |
|---|---|
| Model | BTM-24 |
| Device type | Multifunctional battery and charging system tester |
| Supported battery voltage | 12 V / 24 V |
| Testable starting current range | Up to 2000 A |
| Supported battery standards | CCA / EN / DIN / IEC / JIS / GB |
| Supported battery types | AGM (flat plate, spiral), EFB, GEL, lead-acid (flooded) |
| Voltage measurement range | 6–30 V |
| Diagnostic tests | State of health (SOH) State of charge (SOC) Internal resistance Start test Load test Charge test |
| Test method | Non-destructive (no load on the battery) |
| Test modes | In-vehicle / out-of-vehicle |
| Display | 2.4" color TFT screen |
| Display modes | Day and night mode |
| Data presentation | Numerical values + real-time voltage waveform graphs |
| Controls | Directional buttons + OK button |
| Protections | Reverse polarity, overvoltage, short circuit |
| Measuring cable length | Approximately 61 cm |
| Design | Integrated cable Foldable stand Hanging hole |
| Housing material | |
| Impact-resistant plastic | Menu language |
| English / Chinese | |
| Device dimensions | 80.5 × 155.8 × 28.2 mm |
| Device weight | |
| Approximately 479 g | |
| Application | Passenger cars Motorcycles ATVs Boats Delivery and truck vehicles Fleets Golf carts |
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NEMOKAMAS PRISTATYMAS PERKANT UŽ 50 EUR IR DAUGIAU
Nemokamas pristatymas į Omniva paštomatą perkant daugiau nei 50 Eur
Nemokamas pristatymas į LP Express arba Lietuvos paštą perkant daugiau nei 70 Eur
Nemokamas pristatymas į namus ar darbovietę perkant daugiau nei 150 Eur.
PRISTATYMAS Į Express arba Omniva SIUNTŲ TERMINALĄ
Siuntimas kainuoja 2,49 EUR. Į LP Express 3,99
Užsakius iki 14 val., prekes išsiunčiame tą pačią dieną (tik darbo dienomis). Į siuntų terminalą jūsų užsakymas bus pristatytas per 1-3 darbo dienas nuo išsiuntimo dienos. Paštomatas parenkamas automatiškai artimiausias nuo jūsų pateikto adreso.
Nukreipti siuntą į kitą pristatymo vietą galimybės nėra. Siuntą galite atsiimti jums patogiu laiku. Siuntų terminalai veikia 24 valandas per parą.
PRISTATYMAS Į LIETUVOS PAŠTO SKYRIUS
Pristatymo kaina į pašto skyrius – 3,99 EUR.
Užsakius iki 14 val., prekes išsiunčiame tą pačią dieną (tik darbo dienomis). Į Lietuvos pašto skyrius prekės bus pristatytos per 1-3 darbo dienas nuo išsiuntimo dienos.
PRISTATYMAS Į NAMUS AR Į DARBOVIETĘ KURJERIU
Pristatymo kaina - 4,99 EUR
Užsakymą priims kurjeris ir pristatys jums tiesiai į namus ar darbovietę. Dažniausiai tai trunka 1-3 darbo dienas nuo išsiuntimo dienos.
PRISTATYMAS Į UŽSIENIO VALSTYBES
Pristatymo kaina - 6,99 EUR.
Užsakymas išsiunčiamas per 2 darbo dienas. Pristatymo laikas svyruoja nuo valstybės į kurią siunta keliauja. Dažnais atvejais pristatymo laikas yra tik 2-3 dienas ilgesnis nei Lietuvoje.
P.S Pristatymo kaina gali didėti jeigu prekės yra labai didelės arba jų svoris viršyja standartus, kurie nurodyti pristatymo tarnybų puslapiuose. Tokiais atvejais patys susisiekiame ir aptariame situaciją, Jums papildomai nieko daryti nereikia.
