Hey guys, I want to buy a Lifepo4 on Amazon, I like the free return options. Emmm, I search the comments, the standard discharge current is 40A and Max. Continuous discharge current is 200A with 200AhPlus version. Only 40A??? Why is so low>??Another question is:Under Max. Contiuns discharge current, how long can it work, and can it work until the battery runs out?