Review on 2-Piece Battery Meter Monitor: Low Voltage Buzzer Alarm, Digital Capacity Tester for 10-100V Batteries - Golf Cart Voltage & Temperature Monitor by William Bell

After 3 days of using this product, I make the following observations: - The meter does NOT save the settings when temporarily disconnected from the power supply. In other words, it doesn't have a storage capacitor that allows the settings to stay in memory. - I need this for the battery compartment, if I disconnect the battery, even for a moment, the meter forgets all my settings *1: battery type, 2: DELAY TIME before shutdown, 3: voltage settings, 4: low voltage alarm setting. Every time this meter is turned off, it takes several minutes to adjust these settings, even if it's just for a moment. - You can independently set the minimum and maximum voltage as a percentage of the power. , optional.- My application is for a lithium battery, but the meter defaults to a lead acid battery when reconnected. It takes some time to reconfigure all settings. This could easily be solved with a small storage capacitor. Recommendation: If you are using this in an RV, boat, or vehicle (etc.) whose power is rarely interrupted. YES, it works great. There is some initial setup, but it seems to be working as expected. CONS: If you're using this for an application where the voltage will drop to zero, even briefly, this isn't a good option.