2oldman wrote:
skipro3 wrote:
I think it's a waste of money to go with Li batteries.
Over the long term, maybe not, but if your wallet isn't too fat, I can see why you'd say that. It's nice to be able to run them down to 20% soc and not worry about damage. Or water. Or corrosion.
So as long as the conventional batteries are probably going to be abused, the Li's make sense.
I've got a Li in a motorcycle. Mostly just to see what all the hoopla is about but also for longer cranking in case I need it out on the trails. It was then I discovered the sneaky way they are rated. A 10ah rated Li isn't 10ah. It can handle a load like a 10ah because it can handle just about a dead short without damage. Meaning it has the cranking capacity for a short while. Not what a RV battery is really designed for. The lighter weight is because the actual cells are smaller, despite what ever case they are in. I discovered I could upsize my motorcycle battery to a size or two larger. Here's what I bought;
https://www.amazon.com/Lithium-Phosphate-240CCA-Replaces-YTZ14S/dp/B00XWYF40C/ref=sr_1_3?ie=UTF8&qid=1524610751&sr=8-3&keywords=battery+tender+lithium+batteryNotice on the battery it states a Pb Eq 10-14ah. NOt that it IS 10 to 14ah, but the equivalent. What the heck does THAT mean? The description says; "Specifications: Voltage: 12 Volt; Cold Cranking Amps: 240; Lead-Acid Replacement Range: 10-14(Ah); Operating temperature: 0 - 140 Degree (Fahrenheit); Max Charge Rate: 10 Ampere "
Hmmm,,, a lead acid replacement range. Not the actual ah capacity, but the capacity if compared to a lead acid you want to replace. No bueno!