I complete a J camera conversion to solar and am using AA rechargeables on three, with a 4D on one and a G-camera on solar as the "home" unit. I have one J unit that is struggling to keep the AAs charged (something I noticed when relocating cameras) so I am moving it to a sunnier location. However, the solar panel batteries in the PW3600s seem to be working well and keeping everything running in light timber, and the AA rechargeable are backup only.
My experience is not as long as many, but my G-camera on solar is at 120 days in semi-shade and it is doing great, and the J-cameras, which used to require new batteries about every 60 days are good.
I am also running three SpyPoint Link-S LTE solar cameras and they seem to be doing every well...180s days and never under 90%...these are not over feed, so they do not get a massive number of pictures. So far, I am pleased with both systems. and both have their place. My plan is to retire all non-cuddeback or cell cameras and be 100% solar next season