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Best day ever when I got rid of that size 27 AGM , and went with the Lifepo4 .I used my 65ah battery for 4 days without charging. I was trolling for the most part - maybe 20 hours total. Lots of charge left. But the best part was the weight of, or lack thereof, of the battery. Good bye AGM and lead batteries!
Prepare to be amazed.Great thread. I’m looking at a LiTime system to replace my group 27 Lead acid battery for a Minn Kota 55 lb thrust infinite speed motor.
Am I missing anything to swap into current tech?
- LiTime 100ah 12v mini battery
- LiTime portable battery box
- LiTime 12v 20A charger
Congrats!! You're gonna love it.Shakedown trip yesterday. Pushed my drift boat around just fine!
View attachment 179386
You could, if you wanted to, even get away with a smaller 50-60ah battery for that size motor. But if money or space isn't a blocker, always better to have more amp hours.Great thread. I’m looking at a LiTime system to replace my group 27 Lead acid battery for a Minn Kota 55 lb thrust infinite speed motor.
Am I missing anything to swap into current tech?
- LiTime 100ah 12v mini battery
- LiTime portable battery box
- LiTime 12v 20A charger


Lluz, I didn't realize you'd already got your setup together and ready to go. Awesome!Shakedown trip yesterday. Pushed my drift boat around just fine!
View attachment 179386
Good stuff. My reasoning was the 100ah batteries seem to be a sweet spot in footprint/weight/amps trade off. I’ll be able to run my motor 2-3 days.You could, if you wanted to, even get away with a smaller 50-60ah battery for that size motor. But if money or space isn't a blocker, always better to have more amp hours.
I've run multiple different 50-55 lb motors with this 12v 50ah 11.5lb LiTime battery:
View attachment 179392
Here's Minn Kota guidelines for Lithium battery a/h size. I suspect it's already been posted in this thread, but no reason not to post it again.
View attachment 179393
You can run any of those motors with 50ah, just not for as long as a 100ah. I believe that chart is best used to help one size wire and fuse requirements and not battery amp hours. If you are using a PWM either as built in with the motor as the newer ones have them, or as an add on between battery and motor, those amps will be at top speed. The older motors, or the cheaper models, do pull a continuous discharge amperage at all speeds. Hence the use of a PWM to conserve amperage draw from the battery.You could, if you wanted to, even get away with a smaller 50-60ah battery for that size motor. But if money or space isn't a blocker, always better to have more amp hours.
I've run multiple different 50-55 lb motors with this 12v 50ah 11.5lb LiTime battery:
View attachment 179392
Here's Minn Kota guidelines for Lithium battery a/h size. I suspect it's already been posted in this thread, but no reason not to post it again.
View attachment 179393
I guess I just like the 50ah lithium size as a really good middle ground, especially for smaller boats. Enough power to run the motor as much as most folks would ever need, but also still a compact size and light weight.You can run any of those motors with 50ah, just not for as long as a 100ah. I believe that chart is best used to help one size wire and fuse requirements and not battery amp hours. If you are using a PWM either as built in with the motor as the newer ones have them, or as an add on between battery and motor, those amps will be at top speed. The older motors, or the cheaper models, do pull a continuous discharge amperage at all speeds. Hence the use of a PWM to conserve amperage draw from the battery.