does this work on a 12 V 8D diesel truck battery?

This will work on all batteries 12 volts and less A carbon pile tester would be a better choice for the larger 8D battery

As this tester puts a 130 Amp load on the battery being tested, is that too much load for testing small batteries such as motorcycle & lawn tractors?

Hi R.W., this tester will certainly tell you if smaller batteries are in good shape but it is kind of over kill as it works by resistance testing. Kind of like plugging a toaster onto your battery. It will draw a lot of juice off the battery in just one test with smaller batteries so if they are weak you will know it fast and they will likely need a recharge afterward. I use it for 4 and 8 D size batteries for starting large diesel engines. I would suggest a lighter amp load tester for what you are doing. Something around a 50 amp range.Hope this helps.Paulpaulmgriswold@aol.com

So this would tell you if a car battery is working properly Etc?

It puts a load,like you're trying to start your car,on the battery, and will tell you if the battery is bad. Most batteries last 5 to 6 years cheaper ones less so if it's old just buy a new one But if it's newer you might want to check it before buying a new one. The battery has to be charged though, you cannot check a dead battery , so unless you have access to a battery charger this won't help you.

will this work on 8 volt golf cart batteries?

Hi Cabo, It might as it has scales for 6 or 12 volt. It would read a little high on the 6 volt scale when checking 8 volt. I can't promise it will work though.

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OTC 3181 130 Amp Heavy-Duty Battery Load Tester - Provides Accurate, Reliable Test Results in Just 10 Seconds

OTC 3181 130 Amp Heavy-Duty Battery Load Tester - Provides Accurate, Reliable Test Results in Just 10 Seconds

Product ID: 3842590

Details

Brand
OTC
Color
Black
Item Weight
1.38 Grams
Power Source
Battery
Style
Tool

⚡130A heavy-duty load

📊0-16V extra-large display

🔋6V & 12V battery compatible

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701.75 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Test smarter, not harder—know your battery’s power in a flash!

BIG BOLD DISPLAY - Extra-large 0-16 volt range screen with zero adjust for crystal-clear readings every time.
VERSATILE CLAMP GRIP - Unique clamps ensure a rock-solid connection on both top and side post batteries—no slip, no fuss.
SMART STORAGE SOLUTIONS - Integrated side tabs and back brackets keep your tester ready and organized in your toolbox or on the wall.
RAPID 10 SECOND ACCURACY - Get reliable battery health insights faster than ever—no more guessing games.
ERGONOMIC HEAVY DUTY DESIGN - Comfort meets power with a robust 130-amp load tester built for professional-grade durability.

The OTC 3181 is a professional-grade, 130-amp heavy-duty battery load tester designed for quick, accurate diagnostics of 6V and 12V batteries. Featuring an ergonomic build, uniquely engineered clamps for secure grip, and an extra-large 0-16 volt display, it delivers reliable results in just 10 seconds. Compact and lightweight with smart storage options, it’s the essential tool for any serious garage or workshop aiming to avoid costly battery replacements.

Specifications

ASIN	B000O3U2UQ
Best Sellers Rank	#70,583 in Automotive ( See Top 100 in Automotive ) #74 in Battery Testers
Brand	OTC
Brand Name	OTC
Color	Black
Compatible Devices	6V and 12V batteries
Customer Reviews	4.6 out of 5 stars 744 Reviews
Global Trade Identification Number	00731413417566
Included Components	Amp Heavy-Duty Battery Load Tester
Item Dimensions	9 x 11 x 4.2 inches
Item Weight	1.38 Grams
Item dimensions L x W x H	9 x 11 x 4.2 inches
Manufacturer	Sunpro
Measurement Type	Ammeter
Minimum Operating Voltage	6 Volts (DC)
Model	3181
Part Number	3181
Power Source	Battery Powered
Specification Met	CE, RoHS, UL
Style	Tool
Style Name	Tool
UPC	731413417566
Unit Count	1.0 Count
Warranty Description	1 year manufacturer

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701.75 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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