Just curious - why Lithiums are so heavy?
100 AH, flooded, 66-69 lbs. 100 AH, Li, 29-31 lbs. Brain-dead sellers jumping on a new bandwagon, "One-fifth the weight of a traditional battery", yahooo.... More usable capacity, yes, but not...
Forum Discussion
pnichols wrote:
Another "problem" with Li batteries that lead acid or classic dry cell batteries don't have is: Li batteries don't smoothly taper off voltage as they begin to need recharging - they just kindof are full voltage all the time or suddenly put out inadequate voltage right when they die.
I see this all the time with the Li batteries in my flashlights. .....
Yes. Li discharge curve doesn't smoothly taper off, it changes by ~0.5V from 100% to 15% SOC, and then it's a free fall to death, can't support the load anymore.
Given much longer cycle life at max 90% SOC than at max 100%, you want to cycle in 90-20% range. You would hardly notice the voltage change in this range. AH monitor is a must with these babies.
