Cobalt Battery

[J105Puff]

How much battery drain is there in a Cobalt that is fully charged then stored for 30 days? Should drop to 90% 80% ect?

 

[RonR]

How much battery drain is there in a Cobalt that is fully charged then stored for 30 days? Should drop to 90% 80% ect?

Normal drain would be on the order of 1-2% per day, at typical room temperatures. The Cobalt "wakes up" every few minutes to sample and store ambient pressure data, so if you jump in the mountain lake without turning it on it still has correct topside pressure to use for deco calculations. A fully charged Cobalt should still have some power for close to six months of standby. As the battery ages, this will decrease somewhat.

It will help the battery to last longer if it is kept charged at least halfway (not necessarily fully, though), and stored at normal room temperatures (not really hot or frozen). So it's a good idea to charge it up every couple of months even if it's not being used.

Ron