Golf range finder

Purchased a neo ghost GPS from the Pro Shop Boksburg approx 2 years ago. Experienced problems with GPS switching off whilst playing. Recharged fully with GPS working perfectly for 4 holes then switched off. Pro shop had to send it to Ultimo who could install a new battery. After a month Pro shop advised that Ultimo advised it was a sealed unit and nothing could be done!!!! How can you market an expensive product but not able to change the battery. They made an offer for me to purchase a new one at a good price R1600. After one year if battery gives problems throw it away???? I find this absolutely unacceptable.