and how many dives are you doing in that 6 months period?
You probably want to use a full battery kit from Suunto. It comes with a plastic back and new seal which is how you know it (the seal) will still work - and the battery is the right one! I have had a Mosquito since 2004 (I think) and it's had 2 batteries (though it hasn't really been used since last year being as it's now computer number 3). I'm doing and did significantly more dives than you.HI I HAVE A SUUNTO MOSKITO AND I SEEM TO BE REPLACING THE BATTERY EVERY 6 MONTHS AT LEAST I HAVE GOT THE LAST BATTERY FROM A SHOP IT WAS A DURACELL CR2032 SURLY THEY SHOULD LAST LONGER THAN 6 MONTHS
CHEERS ANTHONY