Panasonic Toughpad FZ-F1 - Manual (Page 43)

43 Appendix
When using the product in cold environments, the product may
take longer to start up and battery operation time may be
reduced.
Even when using the product within the temperature and
humidity ranges listed here, using the product continuously in
extreme environments will result in product deterioration and will
shorten the life of the product.
*16 Product functionality cannot be guaranteed if the operating
system is modified or replaced by the user or a third party.