12V 24V 36V 48V Battery Capacity Indicator Golf Cart Voltage Meter with LCD Display Green Backlight, Waterproof Monitor Gauge Digital Voltmeter Testers for 3S-26S Lithium Battery&Lead-Acid Batteries

Works as it should. Takes a bit of effort to get it programmed. The instructions are translated from Chinese? so you have to interpret a little. The bars in the “battery” indicate which functions are active.

Took about an hour. Used telephone wire worked great.

Instructions are rather cryptic.1. Get into 'Program battery mode' by holding 'settings' button (left button) as you provide power to the device. Won't work if the device is already powered on.2. Use. 'settings' button (left button) to toggle through battery types. I selected 'F' for LiFeP.3. Press 'function' button (right button) to select number of in-series cells. 'Function' button will increase count. 'Settings' button will decrease count. I used '4' for my 12v battery.4. Press AND HOLD the 'function' button (right button) to get into the 'Program Settings' menu. This allows you to turn backlight on or off, for example. The 'settings' button (left button) will select the function (Voltage/Pct toggle, Backlight, Auto-off) and 'function' button will toggle each setting to be on/off. I set both 'S1' (Voltage/Pct toggle) and 'S3' (backlight) to be 'on'.5. Wait for menu entry mode to time-out when you are done making your selections.

The display is small but is about the size of a normal battery life indicator on a golf cart. It seemed to be accurate a few time I tested it against my voltage meter. It’s easy to see, it seems to be made correctly, and I think it could be used to monitor any battery system.

closely read the entire description. very confusing to install. very small. I would not purchase again and likely will not return as it was only a few dollars. not as described. English as a second language seems to get in the way of accuracy.

Meter works good - Instructions are like reading Japanese- Sleep mode don't work had to put a switch in to shut it off when I'm not using cart. after several wiring changes- and going direct to battery with both wires- it isn't accurate- thank God the lithium battery has a Bluetooth connection to my cell phone- There is about a 25% difference between the 2- I trust the Bluetooth

Love it, great to get a better picture of what my battery level is at. I connected to a ground under the dash and the positive coming off the key. I have it set to light up for 10 seconds when I turn the key on then turns off unless I push the button. Reading isn't as accurate as if I went direct to the battery but super easy to install and is good enough for what I need.

This is a decent , compact battery monitor that will work in a lot of different set ups. Decent quality and you can set it for different types and more than one battery. I bought one for each Lithium battery in my fishing skiff. Easy to flush mount to the top of a battery box or on top of a battery.