How does this compare to the 310 model?

310 has 30 Amp clips allowing it to be used as a portable amp meter. Further, the head unit has upgraded display with analog bargraph and data hold. 310 does not have an adapter for the new micro fuses, we are currently working on that.

Is the probe fused to protect the meter?

You remove the car fuse and plqce it in the tester’s receptacle. The car fuse protects any overload.

Is 0.1A resolution, that would be 1.2W, fine enough to find a power leak that takes days to drain a battery?

Maximum allowable draw is usually 0.050 amps or 50 ma. So this tester would help if your battery went dead overnight possibly but not for anything that takes days. Now for the reason I like it. If you're adding accessories to a vehicle, you can use it to calculate startup loads and running loads to appropriately size wiring and fuses. For this reason I recommend it.

What kind of battery do you need? Is it a standard size? Do you also sell the batteries if they are not standard sized ones?

A23 battery, readily available. Here's a listing for sale on Amazon. https://www.amazon.com/Energizer-Mercury-Alkaline-Batteries-Packaging/dp/B00004YK10?th=1

Desertcart Logo

Deliver to Portugal

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

⚡ Diagnose Like a Pro, Anywhere, Anytime!

PORTABLE ORGANIZED - Includes a sleek storage pouch to keep your Fuse Buddy Mini Kit ready for any job on the go.
PRECISION AMP READING - Accurately measures circuit amperage up to 30A with fine 0.1A resolution—no guesswork needed.
PLUG AND PLAY CONVENIENCE - Simply plug in and instantly read circuit amp draws—speed up your troubleshooting workflow.
COMPACT ACCESSIBLE DESIGN - New adapters engineered for easy access in cramped fuse panels—diagnostics made effortless.
UNIVERSAL FUSE COMPATIBILITY - Seamlessly tests Micro, Mini, and ATO fuse circuits for ultimate versatility.

The ES Electronic Specialties 309A Fuse Buddy Mini Kit is a compact, precision tool designed for professional-grade electrical diagnostics. It supports testing of Micro, Mini, and ATO fuse circuits up to 30 amps with 0.1 amp resolution. Featuring improved adapters for tight fuse box access and a convenient storage pouch, it streamlines fuse testing and circuit troubleshooting for electricians and tech-savvy professionals alike.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

€ 86.56

Duties & taxes incl.

Portugalstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

View all Trustpilot reviews

Manufacturer	Electronic Specialties
Brand	ES
Model	Fuse Buddy
Product Dimensions	7.62 x 3.81 x 2.54 cm; 170 g
Item model number	309A
Manufacturer Part Number	309A
Item Weight	170 g

ES Electronic Specialti - 309A Fuse Buddy Mini Kit - Improved

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions