Schumacher Electric 100A Car Battery Load Tester and Voltmeter, for 6V/12V Batteries Up to 1000 Cranking Amps, Charging System Diagnosis, BT-100, for Power Sport, Automotive, and Marine Batteries

Simple but very effective tool.

Great battery tester. I didn’t want anything digital. Too much digital these days, this tells me everything I need and no worry to charge it up or leave it out in the shop where humidity muchmess it up.

It a great product BUT MY SON RAN OVER IT WITH STEIGER TRACTOR NO WORK ANYMORE

My reason for purchasing this load tester was to diagnose a battery that had died a few times in my mother-in-law‘s car. For some reason I did not have one of these in my toolbox and figured this was a cheap way to add one. I have read other reviewer‘s who talked about the accuracy of the gauge on this unit and the build quality. Just to give you an idea exactly what this load tester is. This is a metal box with a heating element inside. The idea behind this is that you take a voltage measurement of the battery, then attach this and press the button for between 5 and 10 seconds and check the battery voltage again. The voltage should not drop more then a half a volt or so. If you’re starting voltage is less than 12.5 you cannot trust the results you would get. I would suggest you charge the battery until the voltage is 12.5 or higher. The heating element in this tester mimics a heavy load from your vehicle. This will help you determine if your battery can hold enough charge to start your car. I use a digital multimeter for all of my voltage measurements. At this price point I would not rely on the gauge on any tool to do that for me. My main purpose for purchasing this tool was to be able to apply a heavy load to a battery. I do not expect this tool to give me accurate measurements of a battery’s health. This review has gone on a lot longer than what I originally anticipated. Before I end this I want to mention the smell that comes from this unit. As I mentioned above there is a heating element inside of this metal box, any dust or other contaminants that end up on the heating element will burn off when you apply a load. That is expected. Any electrical heating element reacts this way and should not be cause for alarm.

EASY TO USE TESTER... GREAT SIZE... FAST SHIPPING AND DELIVERY... GREAT PRICE

The media could not be loaded. Very very useful, It's great. It has help me a lot to test some batteries I thought they were working. I had a battery I wish was in a good condition, unfortunately It's a weak battery so I can not use it properly. Thanks to this tool I'm able to know when a battery works or not.

I just received it today. I used it to check 2 batteries, 1 I know is bad and 1 I know is good. This tester works great. Very Satisfied with my purchase.

This tool does 3 things. You must read and follow instructions carefully for proper interpretation.1: Measure battery voltage on scale and verify "OK" or "Not OK" on graph.2: Measure battery reserve "Ok or Not Ok" on graph. First uses will produce smoke from resistive coil which is normal.3: Measure alternator charging ability on graph while idle slightly increased and headlights on and blower fan on high.I have found it useful and reasonably priced.