Just bought 2 new trolling batteries

[garyw]

 Shorepower.com. VMAX MR137-120 12V 120Ah AGM Deep Cycle $489.08 delivery was fast batteries are fresh.

75lbs each if anyone is looking.

[Dutch]

What is the reserve capacity of that battery?

[garyw]

https://www.bargainshore.com/VMAX-MR137-120-12V-120Ah-AGM-Deep-Cycle-Hi-Performance-Battery_p_3541.html

All Minnkota's manual said was min 105 Ah. thats all i know

 

[MGP]

On 10/10/2020 at 7:39 PM, Dutch said:

What is the reserve capacity of that battery?

230 mins. If these batteries actually meet specs they're pretty impressive. 75 lbs. is a clue they probably will. I've designed a lot of commercial battery chargers and tested pallets of batteries. The devil is always in the details.

[garyw]

yep. i went by the Ah rating and weight. also plenty of reviews from many different websites

 

[snagged in outlet 3]

1 hour ago, garyw said:

yep. i went by the Ah rating and weight. also plenty of reviews from many different websites

 

There is a simple calculation to convert ah to rc, or the other way.  I found it online.  I think this is it. 
https://sciencing.com/how-8681870-convert-reserve-capacity-amp-hours.html

[garyw]

I just try to keep it simple since I'm pretty simple. I just looked for Batteries with the Ah rating stated. No need to convert. Most batteries i saw with just an rc rating were dual purpose starting and deep cycle. I didn't need that.

[snagged in outlet 3]

6 hours ago, garyw said:

I just try to keep it simple since I'm pretty simple. I just looked for Batteries with the Ah rating stated. No need to convert. Most batteries i saw with just an rc rating were dual purpose starting and deep cycle. I didn't need that.

10-4.  I just thought it might help.  

[skeeter]

New to me are the Lithium Iron Phosphate batteries I just discovered on eBay that are roughly half the price of Lithium Ion batteries.  They aren't quite as light-weight as Lithium Ion but are still only 40% the weight of traditional lead-acid batteries.   Saw them on the eBay site from a Chinese-maker in the $450-$499 range while they are on the Dakota battery site for the upper $800 range.   Found this information about Lithium Ion vs. Lithium Iron Phosphate if anyone is interested: https://www.lithium-battery-factory.com/lithium-iron-phosphate-vs-lithium-ion/

 

[garyw]

If you have a Minnkota troller, read the battery part about lithium batteries. just a line or two, easy to miss.