CAT PHONES Caterpillar S40 Rugged Waterproof Smartphone The cat S40 is a ruggedized smartphone that combines a very bright IPS screen and long battery life in a robust exterior. Dust, high temperatures, and drops of up to 6ft are no problem for this IP68 waterproof smartphone designed to withstand even the harshest environments. Boasting our largest capacity battery yet, on a full-charge the S40 offers up to 18-hours talk-time and an impressive 39 days stand-by time. Featuring 4G ultra-fast data, NFC, GPS, a 4.7Qhd screen, and a unique industry relevant app store, the S40 sets the bar for rugged smartphones.