I tried both the Boge 3 ohm and 2 ohm cartomizer on my ego batt.
Both works. But the LR 2 ohm provided more flavor, heat and vapor.
Boge LR 2ohm also closely match the ego-t atomizer which is around 2.3 - 2.5 ohms.
Avoid 1.5 ohm Dual coils on ego batt. Mixed results with many reporting the dual coils LR burning out their batteries.
Ego batteries are not direct connections. They use (__insert term here__) to regulate voltage to that you will get a consistent 3.3 - 3.4 v output till the end of batt.