The P110 is a good milspec radio. If the batteries are old the radio may not transmit very far. Have a radio repair shop analyze and recondition the batteries if possible since they are pretty expensive to buy new.
Also, have the shop bench check the radios to make sure they are in good working order.
THe P110 is a 6 Channel VHF 5 Watt radio with the frequencies in the business band so you'll need an FCC license to operate this radio.