17 minutes ago, Seafury said:

Think I read we want 2AH charger for lifepo4.

However, I am unsure if the charge rate is related to the battery capacity ie: 10AH, 18AH etc.

With my RC Li ion batteries, the max charge rate depends on the capacity and rating.

 

Fast charging any type of lithium shortens it's life though.

 

I am still new to these specific batteries myself, although we do use some in RC airplanes nowadays.

 

Anyone know for sure the proper charge rate for lifepo4 batteries?

Through some more reason think it’s something like 1/10-1/5 of the rating of the battery. Like a 10ah battery needs a 1ah-2ah charger. I wound up buying a 12ah charger and went with a 1.5 ah charger. We’ll see how it goes.

The recommended charge rate for a lead acid batteries is 10 - 15% of their rated capacity.  

Lithium batteries require a totally different charging technology that lead acid batteries.  I haven't kept up with them for a few years so some of these newer lithium's may come with circuit cards in them that let you use a standard lead acid charger but if it doesn't specifically say it can be charged with anything other than a charger built specifically for lithium batteries, don't do it.   Lithium batteries (at least the ones I use) come with a C rating and that's what they are charged at so have to have a charger that meets the batteries voltage and C rating.

 

1 hour ago, Way2slow said:

The recommended charge rate for a lead acid batteries is 10 - 15% of their rated capacity.  

Lithium batteries require a totally different charging technology that lead acid batteries.  I haven't kept up with them for a few years so some of these newer lithium's may come with circuit cards in them that let you use a standard lead acid charger but if it doesn't specifically say it can be charged with anything other than a charger built specifically for lithium batteries, don't do it.   Lithium batteries (at least the ones I use) come with a C rating and that's what they are charged at so have to have a charger that meets the batteries voltage and C rating.

 

Ya I found one that was specifically for lifepo4 batteries and nothing else