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Handheld 12V battery tester with six LED status lights

OBDMONSTER BM310 12V Battery and Alternator Tester

SKU CH-80M8-822NT

Tests 12 V battery health and alternator output with six LED status lights and reverse-polarity protection

  • Key features1, Battery Powered, false
  • Product weight0.04 kg
  • Product typeVoltmeter
  • Tests 12V battery and alternator health
  • Six LED indicators show good, fair or poor status
  • Works on cars, SUVs, motorcycles and hybrids
  • Reverse-polarity protection prevents damage from misconnection
  • Multi-language manual covers English, German, French, Spanish, Italian, Dutch, Polish, Slovak, Czech and Russian

12V Battery and Alternator Tester

The OBDMONSTER BM310 checks 12-volt charging systems on cars, SUVs, motorcycles, hybrids, boats and RVs. It works with flooded, AGM flat-plate, AGM spiral and gel batteries. Six LED indicators show battery and alternator status at a glance. No internal battery is required for operation.

Suits DIY owners and professional technicians

Ideal for anyone who wants a quick health check without interpreting voltage numbers. Reverse-polarity protection and no-slip copper clamps make it safe to use with gloves on. Not for buyers who need a tester for 24-volt systems or a device that stores and prints detailed test reports.

Steady reading under load

The unit draws power from the battery under test, so it remains active during cranking and charging cycles. LED colours — green for good, orange for fair, red for low — update continuously while the engine runs. Pure copper leads maintain conductivity through repeated use in workshop conditions.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 90% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameOBDMONSTER
Product typeVoltmeter
Size & build
Product weight0.04 kg

Questions about this item

What type of vehicle electrical system is required for the BM310 to operate?

The BM310 works only with 12V systems found in cars, SUVs, motorcycles, hybrids, boats, RVs and forklifts.

Can the tester check a battery that is completely flat without an external charge first?

No, the device has no internal power source, so a dead battery must be charged before testing can begin.

How do the six LEDs confirm the BM310 is giving a valid reading after the clips are attached?

Green LEDs indicate good or full condition, orange shows a middle state and red signals low; the pattern appears immediately on a healthy 12V system.

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