# Fnirsi BTM-24 Multifunctional Car Battery Tester

**URL:** https://aio.lv/en/product--fnirsi-btm-24--12426869
**Data updated:** 2026-05-10 04:44 (EEST)
**Category:** Car Supplies
**Manufacturer:** Fnirsi
**Manufacturer code:** BTM- 24
**EAN:** 5905156102323
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 36.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 30.57 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fnirsi-btm-24--12426869

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

The Fnirsi BTM-24 is a professional-grade multifunctional car battery tester designed for accurate diagnostics of automotive power systems. This device allows users to quickly assess battery health, voltage levels, and overall performance. It is an essential tool for automotive maintenance, providing reliable data to help prevent unexpected battery failures. Compact and easy to use, it is suitable for both professional mechanics and car owners.

## Long description

The FNIRSI BTM-24 is an advanced, user-friendly 12V and 24V battery tester designed to replace multiple diagnostic tools. It provides a comprehensive assessment of battery health, including voltage, starting current up to 2000A CCA, state of charge (SOC), state of health (SOH), internal resistance, and the performance of the alternator and charging system. This device offers a quick and clear diagnosis, helping you determine if your battery is functioning correctly or nearing the end of its service life.
Advantages
The device utilizes a non-destructive diagnostic method, allowing you to test the battery without applying a load. It features a one-tap cranking test that records real-time voltage drops during engine start-up, as well as a dynamic charging test that monitors voltage waveforms to evaluate the alternator and voltage regulator. With its 2.4-inch color TFT display, the tester provides excellent readability in both day and night modes. The robust, insulated crocodile clips and built-in protections against reverse polarity and overvoltage ensure safe and reliable operation for both the user and the vehicle electronics.
Suitable for
Passenger cars and motorcycles
ATVs and golf carts
Boats and marine equipment
Delivery vehicles and trucks
Professional workshops and fleet maintenance
Used car inspections
When it may not be suitable
This device is designed for standard lead-acid, AGM, GEL, and EFB batteries and may not provide accurate results for unconventional or lithium-based battery chemistries. It is intended for diagnostic purposes and cannot repair damaged battery cells or restore a dead battery.
Key specifications
Supported voltages: 12V and 24V
Starting current range: Up to 2000A CCA
Supported standards: CCA, EN, DIN, IEC, JIS, GB
Battery types: AGM, GEL, EFB, and lead-acid
Voltage measurement range: 6–30V
Display: 2.4-inch color TFT
Safety features: Reverse polarity and overvoltage protection
Cable length: 61 cm
How to use
To begin, connect the insulated clamps to the battery terminals. Select the appropriate battery standard and type in the intuitive menu. For a health check, the device will perform a non-destructive analysis and display a status rating of GOOD, CHARGE, or BAD along with technical parameters. To perform a cranking test, follow the on-screen prompts while starting the engine to record the voltage drop. For alternator diagnostics, monitor the real-time voltage waveform while the engine is running to observe how the system responds to electrical loads.
What to consider before purchase
Ensure your battery type is supported (AGM, GEL, EFB, or lead-acid).
Verify that the 61 cm cable length is sufficient for your specific vehicle battery location.
Note that the device interface is available in English and Chinese.
Usage recommendations: Always ensure the battery terminals are clean and free of corrosion before attaching the clamps to ensure accurate readings. Store the device in the provided carrying case when not in use to protect the screen and cables from damage.

## FAQ

### How much does the Fnirsi BTM-24 Multifunctional Car Battery Tester cost, and is it available for purchase?

The price is 36.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 52 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Fnirsi products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Fnirsi service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12426869/68724891_large.webp