ABURA 12V Lead Acid Battery Fuel Gauge, 12V LCD Battery Indicator Meter for 12V SLA AGM Gel VRLA Lead Acid Battery

Does what it says. I like the green screen as I can read it while outside when there is bright sunshine. I didnt try it in direct sunlight. I don’t know how accurate it is, but based on battery recharge time, it is close enough for my purposes.Update: Feb 2019, vivid green backlighting has failed. Still measures voltage correctly.

not the worst but it took a solid month to arrive. when hooked up to a brand new Blue Top**fully charged via an Optima charger.. the 'bar' display shows about 87 percent with all but 1 bar. when switched to volts it seems to be within .1 volt of accuracy which works for me. disappointed that my battery will never read 100%, hooked up to dewalt 18v battery that was dead @16.4Volts and it read 100% :(I guess its digital and easy to read, easy to operate.but the tiny wires and the quick disconnect will surely be the fall of this 20$ investmentnot my favorite but I waited too long to return it now

Was Leary of this product due to its cost however it has been installed for 4 weeks now and does what it says

Put some alligator clamps on and you will be set to go. Velcro also came in nicely to attach it wherever you need to

IT cool that you can use this on any battery but if you use it be careful as the wires are super delicate and will snap off.

easy to use and install

It's works fine. Not sure how accurate it is. A good ball park figure

I make small 12V batteries for LED projects and other electronics projects, and this is a quick and easy way to monitor charge state.