i have been running orion batts for about four years now. and i to agree the 4300 are junk my 3700 from them outperform my 4300.
i use a smart tray and then i charge with orion step charge rates that they recommend to use on 4300 cells. they are very flat but do run long, just no punch and i get smoked on straights since i cant get out of the corner. if they are replacing your batts maybe i should call them.
but i also know that orion is no longer offering gp cells at all and will only be selling the ib4200 batts. right now those are not available yet either, so now what.
i have trusted orion products for so long that i just figured despite the numbers i got some bad batts and left it at that. but now hearing everyone else i may call them also. three of my packs are only one month old and the other two and a half months old.