Turned mine on week before first race, came up low battery.Phoned unikon quoted £96 + del phoned S.H.U and asked about legality of getting batteries fitted elsewhere, was told no one was autherised to carry this out and would have to send to unikon. Sent of to unikon and it was returned to me in a week total cost inc carriage was £106. This unit was 6 to 7 year old and was bought at same time as Tam Young (Big Slim) as 6 of us bought it at the same time and Tam Mcleod agent at the time done us a deal.