Hello. Sign In
Please enter a valid city, state or zip code
45 reviews | 4.5 out of 5
I purchased this to monitor my 12v portable power packs I use for camping. I'm a retired Master auto technician and I used a $3000 digital lab scope to test the accuracy of the monitor. I was very surprised at the accuracy. It was right in line with the expensive unit.
I bought this SPECIFICALLY because it indicated "hundredths" of volt. In this way you can really see the condition of your 12v battery & charge system. I feel that using only the single decimal does not give sufficient charge indication as 12.7v is indicative of full (100%) charge and 12.2v is already under 50% - the extra decimal digit just gives better info.
Value has four stars only because I did find this in the local store (afterward) at a lower price even though searching online claimed the local to have none when I made my initial check. I suggest actually checking the physical store prior to ordering online if at all possible - you may save a few bucks and get it quicker.
Easy product to use and provides very accurate readings. Served my purposes completely
This voltmeter monitors both battery voltage (engine off) and alternator output voltage (engine running). Indicators include colored LED's, a vertical bar graph and a large digital display reading in hundreds of a volt. The device is smart enough to know whether or not the engine is running so the "condition" readings are appropriate. The head is adjustable for the best viewing angle. I leave mine plugged in as a permanent display. I'm really happy with the product. It arrived at my local WalMart sooner than promised.
My volt meter in my 03 Silverado 1500 HD quit working about two years ago, I checked battery and alternator voltage peoridocally with my multimeter, but it was unerving to be miles from home and not have constant monitoring as I pull a 25' fith wheel camper, now in excess of 90,ooo miles across the US and Canada. (yes ninty housand) tip-use 3rd gear not drive.
I was doing a intrnet search lookind for a better way than replacing the instrument cluster, when I saw this device which plugs in the lighter receptical, reading the instructions, specifications and reviews, this shoud work great. and it does, very happy with this product. ordered on line from Wallmart, it arrived at my local store in bout one week.
What We All Need To Be Aware Of A Problem Before It Gets Bad. Very Accurate Reading Lights Up In Darkness. Aloha;Mod Squad
Works as advertised. No more mystery how my battery is doing.
Just plut it in the cigarette lighter/12VDC socket before you start the engine - then watch the voltage. Before starting the engine, it should be close to 12.8VDC. Near 12.0VDC, your battery is almost empty. When you start the engine, it should be above 14.2VDC. As you keep driving, the voltage should drop to 13.6VDC, possibly a bit less, as the battery is being charged. If you leave your car overnight and the voltage is still near 12.0VDC, a new battery will be in your future.
I use this tool also for my RV to check the chassis and coach battery voltage levels so I don't have a surprise in the morning when I leave.
I bought this volt meter to monitor the charging system on my older (1985) Honda Goldwing. The real-time digital voltage display is excellent, and told me exactly what I needed to know. The LCD display lights up enough to see it easily at night, but not so bright as to be a distraction. Now I just leave it in the socket all the time (switches off with the key).
It does not come with instructions, though, which would have been helpful in determining what some of the symbols on the display are supposed to mean. A quick Google search found that the circle indicates it is reading the charging system, while the batter symbol indicates ... well ... the battery.
It's an excellent tool for initial diagnostics and monitoring.
We purchased two of these little devices. We had one previously purchased in the store and when we wanted another we were disappointed that only the less sensitive model was being offered in the store. We were delighted to find that the increased sensitivity model could be ordered online and then conveniently picked up at the store.
This product makes it very easy to evaluate alternator and battery issues instantly. Large digital readout. This is my second one. My first one lasted for many years. This is an excellent diagnostic tool and the price is hard to beat.
Would not leave home without one of these in my car. Love knowing battery and alternator status versus just waiting for a red light to light up on the dashboard. This is my second one, lost my first in a move or it's in a storage box somewhere.
Bought for its two decimal readout and adjustable head. When I checked its accuracy against a $150 Fluke DIgital Multimeter, the Equus voltage was within 0.02 volts. Wow!
Exceeded my expectations, and at $13 it is a great value. Every RV or Boat should have one as a primary or secondary battery monitor.
Very accurate compared to what a mechanic would use.
Plugs in and tells me precisely what the battery charge and alternator activity are. Acts like the old-time dash amp meter used to (don't know why the manufacturers eliminated that). Switch from car to car to check charging situation. It seems very accurate.
Excellent display, day or night and ideal for monitoring battery and alternator charging status. I see a lot of people broken down on the highway and the worst thing is when they are with their families. As a mechanic, I often stop to help, especially when there are children involved and 8 out of 10 times, it's the vehicles charging system that has failed. This product easily allows me to check my vehicles charging system and this way, I can prevent stalling on the road, especially if I have my familly with me. Because I know what the charging system should read, I can fix the problem, before it every happens. Great tool to have.
Easy to use, accurate readings, nice easy to read bright display with large numerals. Head tilts for easy to read angle.
im not sure this thing is working right but it does tell you if your system is charging.
Only tried it once. Need to compare it against another device for accuracy. So far I like it.
I just got this meter yesterday. I took it home and plugged it in. The battery reading was 14.8 V and yet the indicator light was red. I checked it with a lab grade voltmeter and battery voltage was 12.4V. When I crank up engine, indicator light turned on green and meter read 18.88V. Holy cow, that means my regulator messed up and could not regulate alternator output to 14.5V. I checked with my lab grade voltmeter and it read 14.4V.
Bottom line is this device does not work as it is supposed to. The indicator light is not accurate. The readout is terrible. It is off mark by almost 5V. I am going to take it back to Walmart. This is the first time I have to return a Walmart.com merchandise back to Walmart. We'll see how well Walmart takes return.
Best battery monitor in it's class, and the purchase through Walmart was flawless.