Frienda 2 Pieces DC 12V 24V 36V 48V 72V Battery Meter with Alarm, Front Setting and Switch Key, Battery Capacity Voltage Indicator Gauge, Monitors Lead-Acid and Lithium ion(White)

These help give me an idea of the charge level on my hybridized Lumedyne photo battery packs. Changing over to lithium-ion from NiMH was scary enough, but these help me keep an eye on what's going on it there

Easy to setup. Would buy again!

The media could not be loaded. Took a moment to figure out what percentage it was based on voltage, otherwise it’s very nice. It would be beneficial if it had a mounting point and better instructions how to set it up for each battery and amp hours. It included a part for lipo and different battery types but not voltage ratings. I had to mess around with it to get it to an accurate reading otherwise it showed 100% the entire time. Super simple to wire just needs to be plugged/crimped or connected into a positive and negative terminal on the esc or preexisting wire of an attached circuit. Good voltage tester that shows percentage as well.

Easy install and setup, easy to read

I bought thes two times so far. Originally I used them to monitor the charge on 12volt batteries being charged by solar cells. some of the batteries were lead acid and one set was lithium. Then the analog battery meter on my invalid scooter started acting up. The analog meter only displayed a guess of the batteries charge. I installed one of these on the top of the original analog (glued down with silicon rubber) not pretty but it works great. Now I know the exact voltage of the 2 batteries (24volt total) and the percent of charge. I really like these and they are so much better than the analog meter... Oh Yea, O drilled a hole near the original meter and soldered the two wires directly to the original meter. Another Plus, the scooter only had a small LED to indicate it was turned on. Now the digital display lights up as a better indication

If you only get two don’t be deceiving by showing four in pictures and then in the description saying that you get two. Other than that product is good.

I ordered 8 of these for our rental golf carts. Ordered in January installed in March. (can't return)Please know that these do not monitor the state of discharge on golf carts. I thought I was buying something that would show renters when it was time to get home and recharge the carts. It does not! It tells you how many volts the cart is but not when the battery goes down. Yes we did the correct settings. Simply does not work for this need. I read a couple other golf cart owner reviews (after the fact) and they are right. AGAIN does not work for golf carts. The unit itself is good and showed the fact that it was a 48v cart. After running my cart for 4 miles which is usually about 40% discharge (tested on my personal cart which I know intimately) the monitor still showed 100% charge or in the other setting 48V. Description for unit is misleading for me. Maybe it's just golf cart owners that this doesn't work for.

One meter seems fairly accurate the other is definitely wildly off I was testing on a 24v lifepo and the defective one was reading 80% with the battery sitting around 30% for the price though even one working battery monitor seems ok to me

Den Voltmetern liegt eine Beschreibung zur Programmierung bei, leider nur in Englisch. Sie können für unterschiedliche Batteriearten und Zellenspannungen frei programmiert werden.