Display (on higher brightness), cpu/gpu intense tasks (gaming, heavy multitasking), Wifi (for example streaming a movie instead of watching it from device storage), in this order can eat through battery. The current iPads are relatively slim and lightweight and thus can't have very big batteries. Unless you want a low spec iPad like the 9th gen (perhaps the 10th gen? I have not had that myself, so no idea about battery life) or a Macbook that has more space for a big battery, you can't expect to be impressed by the battery.Hey,
Not too impressed by my battery life…
Expect about 2 hours in intense use and high brightness, double that for lower brightness or less intense use, and a couple hours more for browsing static webpages (few videos etc) on low brightness. Apple says "up to 10 hours" for that.
And finally, standby usage is a bit high, I found out it's less if I disable Wifi, but completely turned off the battery still drains as if in standby.
I suggest a power bank or a tiny 30W+ quickcharger for on the go (27W is supposedly the fastest it can charge, but if you use it at the same time it might draw a bit more than 30W), that works for me and is still very portable as the alternative would mean bringing the entire M1 Macbook.