This phone from Samsung has a 4,000 mAh battery. Since the phone is water- and dust-proof (IP68), it can handle a bit of grime.
From Amazon
Samsung Galaxy Note 9 (Single SIM) 128 GB 6.4-Inch Android 8.1 Oreo UK Version SIM-Free Smartphone – Lavender Purple
Major Mobiles
Samsung Galaxy Note 9 Dual SIM Unlocked (Brand New), Ocean Blue / 128GB