Frienda Dc 12v 24v 36v 48v 72v Battery Meter with Alarm Battery Capacity Indicator Monitor Voltage Meter and Lithium Ion Indicator(Green Light)

I have a lithium battery in the bed of my truck to power off off-road lights on my rooftop tent and an extra 12 V accessory plug and this little monitor lets me know how much battery power I have left and how much I’m using

good product but hard to set up

The monitors works. It provides the percentage of remaining battery and the current voltage. I needed a monitor for my camper.The instructions do not make much sense. I am thankful for the other reviews that pointed out the small button next to the incoming wires. It took a while to get it set correctly.Be patient and work thru the setup and you will low cost battery monitor.

Added this to my son's e-dirt bike. It was easy to install and does exactly what I needed.

The ad clearly shows two devices. Only if you carefully read the entire listing, does it say you get one only. This is extremely deceptive. Change the damn picture! Instructions on how to set this up are a joke. If you don't know how to set it up, it won't work right. So what's the point of even purchasing this product? What the hell does "set the number of the battery string" mean? When I hook this up it said I had 100% charge when the battery is nearly dead. POC.

I used this product to measure my battery as it is charged by a solar panel. Seems very accurate.

67.4 v battery fully charge is showing 66.3 v on this display, a whole volt off! This should be more accurate than this! For $10 I would buy something else!

I use for batteries on trickle charge. I just like to eyeball every now and then. Beats breaking out vm every time.