This article describes measurement of an Icom IC-7000 current consumption during SSB telephony transmission.
The capture is of an IC7000 running 100W PEP with compression off. I have read copy as loudly and consistently as I could with barely a breath, so it is an overestimate of current consumption. There was small ALC deflection, but not so much as to effectively provide compression. Compression will draw higher current, depending on the level of compression. Note too, that like many Icom radios, the IC7000 draws a relatively high current key down with no audio (4.5A here).
Click on the pic for a larger display. 0.102Ah of charge was used in 1min, so a 4Ah battery might last more than half an hour transmitting all the time, longer with intermittent transmitting. Peak current rating on a 4Ah 25C LiFe battery is 100A, no issue for the 15A peak experienced.