I pull a trailer often. 30ish pounds of gear and a 45 pound dog who rides on it when we go fast down hills. Going slow (below 10 miles per hour) I can easily get 60 miles of never flat, up and down riding on rough forest roads. I don't have a full suspension bike but a Felt Niner with front shocks. Love it for bikepacking and it works very well. Factors which eat battery are speed and terrain. The weight in the trailer matters less.