Hi! I am used to AA/AAAs and this was not logic for me when I saw it. When i placed my 18650 olight in the nitecore i2 charger, the small top part just moved to the side under the plastic wrap. I managed to move it back to middle with my finger but it worried me. Anyway it works but i feel that it does not really fit into the i2, i need to place it a bit oblique to fit, not enough room to place it straight, but charges as usual. Is the moving head a problem or i should not worry?