Dagon

Good to hear that. I'm also having this problem. I get loads of Alien power cells from missions but still can't research them. Also I found out that the mission result screen says Alien power cell but the power cell research option says I need Alien Power cell.

I am in same situation as Paganarh right now but I don't have the biomass repulsion bases researched yet. Getting the biomass node sample was pain in the butt. I used squad equipped with 2 sniper rifles, 1 rocket spitter, 1 M7something (rifle-looking grenade launcher), 1 advanced plasma shotgun and 2 Mp7's + massive load of grenades. Outside ufo I just sent my fastest guy (speed super-heroic) to scout and lure the Greys towards my heavy weapon guys. Inside ufo I just waited and when first enemy showed up nailed it with grenades and hwp. I managed to kill 7 Greys. Then they stopped sending troops to me so I sent 3 soldiers with Mp7's and Adv. plasma shotgun and just run like hell towards the greys and used burst fire to take them out. The remaining greys were all equipped with psi-weapons so it wasn't very hard. I tried this mission about 15 times before I found this tactic to be effective. The most difficult part is inside the ufo because the Greys rushing towards you are equipped with rocket launchers so its vital to take them out before they can launch even a single rocket.