hi all, i bought 4 lithium batteries, they are 12.8v 100ah, i was going to wire them in 2s2p, so have all 4 batteries in a 24v system. I havent done this yet, I bought them 1 week ago and have kept them indoors charging them with a solar panel and a victron mppt, configured for lithium and 12 volts. This is my issue, 3 of the batteries are holding 13.3 volts when left standing for 24 hrs, one battery drops to 12.8v, then if i connect it to a small 12volt fan, within 15 mins its dropped down to 12.6v, i assume that this isnt good and that if i was to connect this battery to the other 3 then they all would suffer. Can anyone give me their thoughts, should i send this one back or hang onto it - one last thing, were building an off grid system, that will run some of my home office stuff, looking at getting a motorhome next year, thats why i went for lithium thinking i could move them to the motorhome and probably get agm for the solar, were in derbyshire in the uk your thoughts on sendingthis one back