so I was having a firing issue and took some advice and purchased two aw imr 18650 1600mah (the ones linked on reos website). the came in today and I charged one up and decided to see how it performs compared to the 18650 2900mah orbtronics I was using. both batteries were full charged, the orbtronics is about 4 weeks old with 2 weeks of reo use and 2 weeks of occasional mech mod use at home. the aw is brand new. results are as follows AW IMR: no load 4.2 under load 4.08. ORBTRONICS: no load 4.18 under load 3.93. just in case anyone had any interest figured id post up my findings. the AW's seem to hit a little harder than the orbtronics and most def fit better inside the reo with less compression on the spring when installed.