Electronics-Salon Low Voltage Disconnect Module LVD, 12V 10A, Protect/Prolong Battery Life.

I bought these wanting to use them to shutoff the battery bank in a portable speaker build but didn't have the foresight to realize a relay operated cutoff with moving parts isn't the best idea for a vibrating speaker. Lucky for me they have a newer version of this board which uses mosfets instead, awesome. Ordered that one also. These boards are going to work great for something else in the future though, and they are very simple to use and program using the dip switches. Accurate and does what it's supposed to do. It should be noted that this will only cut the connection between your cells and your load, at which point the cells will still be connected to this circuit and drawing a very small amount of power. Over enough time that can still drain the battery too much but it shouldn't be a problem unless you're using a setup you'll simply forget about and never check on.

Works perfectly fine for my dashcam. Easy install and settings adjustments. The only downside is the whole board is exposed to possible shorts. However, I just use the static proof bag it came in to protect it under my dash.Failed after about 3.5 years of almost daily usage in the hot summers and cold/snowy winters. Still worth the low cost.The box it comes in can be used as a case is you poke some holes in the side.

I measured a quiescent current of 48 mA, which doesn't seem much, but is MUCH larger than the manufacturer reported value of 2 mA, or 0.7 Watts which is important when running a 9 Watt system on batteries!Also the relay switch flutters when near the connect/reconnect voltage- a very poor design!I purchased one of these a few years ago and tossed it for the same reason, I figured they had to have improve their design by now, but it seems to be the same; shame on me for not reviewing the reviews!This one is very similar CZH-Labs F-1000, which works well, but also has the same excessive current draw.

Initially, I was disappointed with this board mounted disconnect because it drew 400 ma when on. I put an LED 12v light on as a test load drawing about 55ma. When the voltage dropped down near the cutoff switch value, the relay started chattering on and off. Hmmmm. . . not very elegant. After thinking about it overnight, I recharged the battery (12v 7AH) and added a 12v computer cooling fan to bring the total load to 150 - 160 milliamps. With reconnect on 12.8 and disconnect on 11.4, it worked perfectly - no chattering. When I connected the battery charger back to the battery terminals, the load came back on just like it was supposed to do.In summary, it is my opinion that the unit works fine at higher loads but, is not suitable for delicate electronics.Also, the reviews of another CZH-LABS battery protector (B019F3BEIO) spoke of this chattering. I suspect it would work fine with higher load.

I used this in a battery power supply circuit, and it worked well. Cheap protection for valuable batteries, and it also keeps delivery voltage above a set limit, protecting the supplied circuits.

Seems to work very well, the voltage connects and disconnects very close to the settings according to my tests. I used the board to power a smaller relay that was already installed elsewhere which worked out ok. The only caveat was with the load from the circuit board relay removed, the circuit 'disconnect' setting is ignored and disconnect and reconnect voltage become very close together at the 'reconnect' setting. Was not a problem for me since my relay load was very small but just something to be aware of if you plan to use it this way.

Cannot get to operate at programmed voltages. LED will not change color at disconnected state. Will not buy again

The controller battery for our solar hot water system, was under-charging on successive overcast days. I was concerned that if this was allowed to continue, it would lead to shortened storage battery life. This low-cost device had the perfect settings to disconnect the battery when it reached too low a voltage, when sun exposure was low and controller pump operation was not needed. Setup was very intuitive with disconnect and reconnect voltage selections. The attached photo was taken in my initial trials with the device mounted in an orange wide-mount pill bottle, with the black water pump in the foreground.