I have 2 12 volt Lifepro4 100Ah batteries for my 24V trolling motor. I need to be able to check how much charge the batteries have left while I'm out on the water. I currently have 2 standard 12v gauges mounted in the front of my boat that I had for my lead acid batteries. I have read that using the voltage only does not indicate how much charge the battery has left. I would like some guidance as I am new to the Lithium batteries world.
Hey James, were you able to find out what kind of monitor would work to indicate a lithium ion battery’s percentage? It seems to me that reading just voltage wouldn’t work for indicating how much charge is left. Is there a certain meter that you went with that works for this application? Thanks!
@EvanUchacz I was unable to find a solution other than wiring the 2 12 volt voltage gauges which I don't think is able to tell you what's left. Someone replied to a comment I made on another channel with a way to do it but it was rather complicated if I remember correctly. I'll see if I can find it. Not sure what your using the batteries for but in my boat they are fantastic. Best money I ever spent.
@ I’m using mine for the fish finder and NMEA system. I plan on switching over to Li for the trolling motor next fall or so. Apparently, keeping Li batteries topped up all of the time reduces their life span significantly and that keeping them at a 20-80% charge is ideal. That’s why I want to be able to monitor how much charge is remaining. It seems like you probably need a monitor with a shunt that measures amp draw. These type of monitors allow you to preset the amp hours of your battery and after you fully charge it to 100%, it will calculate out the percentage of remaining charge based on what you’ve used of the total amp hours your battery has. These type of monitors seem to cost about three times as much though so I’m not sure if it’s worth it for my smaller battery for the sonar. I’ll most likely get batteries with Bluetooth for the trolling motor. They have all of that information for you to see on your phone so you know what you’re using and how much life is left. Cost difference seems to be cheaper than a monitor. I’m not certain on any of this, but it’s what I’ve been able to deduce from my research. Hopefully that helps you a bit with your research as well. Best of luck!
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Thank you! I was about to throw that gadget away, the manual came in Chinese, a night mare. Your clues saved my day
Glad I could help
I lost my manual and this helped me set it up. Thanks man!
Glad I could help
is there resetter bottom
Menu #5 do NOT touch!
It is for calibration which was factory set during manufacture. 👍
No there's a reset butten
does this device remember the settings after disconnecting the battery?
when the screen turns off, does it consume anything in standby mode?
Hello. I have set everything correctly, Low Volt and High Volt (life4po) it always shows 82%
I have 2 12 volt Lifepro4 100Ah batteries for my 24V trolling motor. I need to be able to check how much charge the batteries have left while I'm out on the water. I currently have 2 standard 12v gauges mounted in the front of my boat that I had for my lead acid batteries. I have read that using the voltage only does not indicate how much charge the battery has left. I would like some guidance as I am new to the Lithium batteries world.
Hey James, were you able to find out what kind of monitor would work to indicate a lithium ion battery’s percentage? It seems to me that reading just voltage wouldn’t work for indicating how much charge is left. Is there a certain meter that you went with that works for this application? Thanks!
@EvanUchacz I was unable to find a solution other than wiring the 2 12 volt voltage gauges which I don't think is able to tell you what's left. Someone replied to a comment I made on another channel with a way to do it but it was rather complicated if I remember correctly. I'll see if I can find it. Not sure what your using the batteries for but in my boat they are fantastic. Best money I ever spent.
@
I’m using mine for the fish finder and NMEA system. I plan on switching over to Li for the trolling motor next fall or so. Apparently, keeping Li batteries topped up all of the time reduces their life span significantly and that keeping them at a 20-80% charge is ideal. That’s why I want to be able to monitor how much charge is remaining.
It seems like you probably need a monitor with a shunt that measures amp draw. These type of monitors allow you to preset the amp hours of your battery and after you fully charge it to 100%, it will calculate out the percentage of remaining charge based on what you’ve used of the total amp hours your battery has. These type of monitors seem to cost about three times as much though so I’m not sure if it’s worth it for my smaller battery for the sonar. I’ll most likely get batteries with Bluetooth for the trolling motor. They have all of that information for you to see on your phone so you know what you’re using and how much life is left. Cost difference seems to be cheaper than a monitor.
I’m not certain on any of this, but it’s what I’ve been able to deduce from my research. Hopefully that helps you a bit with your research as well. Best of luck!
No there's a reset button
Mine keeps giving 100% but the battery must be depleting... can anyone tell me what to do?
You need to select the right battery and the correct # of cells.