DC 12V 24V 36V 48V 60V 72V 84V Golf Cart Battery Meter with Alarm, Front Setting and Switch Key Battery Capacity Voltage Indicator Gauge Acid and Lithium ion Indicator

Added a voltage gauge on my daughters Razor scooter. Works good! Cheap and decent quality. Just the way I like it!

Works well to track voltage

Works but can’t get into the advanced setttings instructions are no good not translated to English very well and half of the instructions don’t work,very bright but can’t see it unless looking directly at it

Echoing another review that made my instal crap-simple! Hopefully this saves you the aggravation I experienced trying to figure it out. DO NOT MAKE YOUR FINAL INSTALLATION/MOUNT UNTIL YOU KNOW IT IS WORKING. 1) Attach the provided (very short) wire harness to DC power supply (battery) using your own wires and connectors to bridge the space from your battery to the harness. 2) Press and hold the Setting button while plugging the harness into the back of the meter. This gets you into programming mode. 3) By pressing the Setting button, select your battery type. Mine is lead acid so I selected "P". 4) Select the number of batteries. In the case of Lead Acid they assume you have 12 volt batteries wired in series. In my golf cart I have six 8-volt batteries for a total of 48 volts. When I first programmed it I entered "6" batteries and as a result it read the voltage correctly but the capacity indicated 0%. I later realized they are assuming 12 volt batteries. So 48 volts divided by 12 volts resulted in 4. I entered 4 batteries and it worked. Enter your equivalent number of 12 volt batteries and then long-press the function key. (Note the lithium battery settings assume your batteries are 3.7 V or 3.2V. Your math will be a little different.) 5) Now set how you want the display to act using the s-1 through s-5 settings. The Settings button toggles through the display options and Function sets each one. The five bars on the display from left to right are each associated with the options S1 to S5. Whether a bar is on or off in the display, indicates that setting is on or off. 6) Unplug the meter from the harness to have it save the settings you input. 7) Plug the meter back in. It should be working. If not, repeat the steps starting at number 2. 8) Only after you have it working, mount it in its permanent location. Good luck!

Helpful enough for its intended purpose. Could use improvement. Has one mode when its always on and another where it turns off. I prefer the latter however, upon waking, its goes back off way too soon, especially given that after it wakes up, it takes a few seconds to update (when its sleeping, its not monitoring the voltage). Also, to change the settings (poorly written or translated btw), you have to be able to disconnect from the power source to both enter the settings and have the settings change. The accuracy seems fair enough.

Have this on my battery box for 4 years and still works like new.

I appreciate the tips other reviewers have provided. Very helpful. But there is still some confusion - especially regarding step 3 - which is where you set the number of batteries in the series. I put this on a Lithium iron phosphate "12 Volt" battery. It's one "battery" so you'd think the number of batteries would be "01". Not the case. For a Lifepo4 battery that is actually a 12.8 volt unit - there are four 3.2 volt battery cells in the unit. The cells are tied together in series giving you a total of 12.8 volts (3.2 * 4 = 12.8). So - I would select F04 in the settings in my case. Once you figure out the math - it isn't too bad. I'm putting it in a cargo trailer - replacing the lead acid battery that came with it so I can be more confident that the electric jack will always work. I will mount this unit on top of the battery box so I can see the voltage easily. If I run into any issues once it's installed in the trailer - I'll come back and edit this review. But the meter seems to be doing the job now.

Will read volts. Battery gauge usless. Battery volts dropped to 12 volts on lithium 50ah battery, depth finders shut off but the bar gauge showed full in the green right before they shut down.