Rechargeable battery systems and rechargeable battery system operational methods are described. A transmission path state estimation unit estimates a state of a transmission path to the wireless terminal based on the DRS included in the uplink user data after the third resource is determined. The compound is intended for use in treating subjects having or being at increased risk\u2014especially genetically determined risk\u2014of developing endometriosis. When the inner lens barrel is inserted into the outer lens barrel, the barrel guiding segment can guide the barrel sliding segment to prevent the inner lens barrel from wobbling and to maintain optical axis alignment, thereby ensuring image-capturing quality of the device.