DC 12V 24V 36V 48V 72V Battery Meter, Battery Capacity Voltage Monitor Gauge Indicator, Lead-Acid&Lithium ion Battery Tester, for Golf Cart RV Marine Boat Club Car Motorcycle - with Alarm, Green

I didn't find the "advanced" menus, even after multiple attempts, but I didn't see them as offering anything that useful either, as I just wanted a display of the battery state for my kids powerwheel when I upgraded it to use a 40V battery, which for that, it does a splendid job of. The display is clear, easy to read, and shows what I want to know. %, Voltage, and a "1-6" segment display of battery life. So I can really easily tell at a glance how close my kid is to killing the battery. (So far, VERY FAR...)

I bought this to integrate into a motor controller build for a trolling motor. It works great and is highly visible day or night. I like knowing the condition of my battery throughout the period of use and this makes that possible with sufficient accuracy. I liked this meter so much that I bought two more to use in other upcoming dc power projects.

I am using this in the control box for my personal pontoon boat to monitor my deep cycle marine battery. The only real way for me to judge the accuracy of the device is when I connect the battery to the charger and see where the needle on the charger starts at. Yesterday I went fishing for about 4 hours and the battery meter showed about 56% left when I pulled into the dock. When I connected my battery charger, it showed there was about 33% battery left.Voltage: The voltage fluctuates quite a bit based on load. Sometimes while running my trolling motor, the voltage will drop to 11.7 volts, but if I shut the motor off it jumps back up to 12.4 volts. The voltage displayed on my fish finder is also different (by 0.2 VDC) than the battery meter.This probably was an unnecessary device in hindsight, but it is nice knowing approximately how much battery is left.Like others have said, the manual is in Chinglish so good luck with that! The easiest way I found to get into the settings is to hold down the button on the back while applying power. And yes, I did set the settings appropriate for my battery.All in all, a good value for the money.

The display covering is a bit delicate, and when I accidentally tossed it into my fishing tackle box, I noticed a tiny frosted mark on the screen. (No points off, because I should have treated it a bit more carefully.) This is awesome, because, I already ran out of battery twice and had to paddle home, but with this monitor, no more paddling is needed. The program is fairly easy to set for the battery type and voltage, and once you set up the choice you want, it remembers it until you wish to reset for another purpose. (even after disconnected from any power).I wish that it would beep when it reaches the alarm zone, but it only flashes, so you have to keep your eyes on it. But having the peace of mind to knowing just how much battery is left is priceless!

Tac works great, ran it on a go-cart with a beefed up flywheel, carb and billet internals...needed to see rpms after building. Can be used with several 1 cylinder, 2 cylinder 4 cylinder engines...Dont let it get wet in rain...screen fogged up, still functioned just not readable.

Does not work on LiFeP04 batteries, show voltage but will always show 100% for capacity. I believe the unit just looks at voltage and converts it to capacity. LiFeP04 batteries hold a constant voltage until they stop. This may work for wet cells but not Lith Ion. wasted money as I have thrown away all the wrappers and cut the wires.

I have an old sailboat with two AGM batteries and did not want to spend a fortune on battery monitors. I just wanted a simple “% remaining” display. I bought these and mounted them in a plastic project box, soldered on the length of wire for each one and a ring terminal and turned them on and they work. I am actually surprised they work as well as they do. It’s not $150 Victron but it is sufficient and didn’t cost me much.Regarding the directions, they are a little difficult to follow because of the Chinese translation, but all the information is there. If you just read it closely follow what it says it was quite simple. To set the thing up all you do is push the button on the back wall inserting the power cord and then click the button a couple times to select your battery type. The settings for the battery types are listed very clearly on the two-page directions. This part took me all of about 60 seconds.The other thing it wasn’t 100% clear was the connections. I just connected the red wire to the red terminal On the battery and the black wire to the black terminal.

Added to my golf cart because the factory led bar graph one failed.Bought this one to see voltage and it works great for that. The battery bar graph not so much but I expected that based on other reviews before buying. My cart is 36V. My multi-meter measured 38.2 volts at battery terminals (my cart was was not fully charged due to driving it around that day). This meter I wired in off the key switch and it also showed 38.2 volts so it is accurate.The leads are pretty short but since I wired to the key switch on the dash it worked for me.Yes the voltage moves around when driving cart as would be expected.There are charts on the web showing voltage reading for golf cart state of discharge. In my case 37.1V equals batteries at 70% charge. That's when I know to throw on the charger. You never want to go down to 50% charge (36.3V) as this reduces overall battery life.It is also easy to read in daylight.