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Thanks for reminding me to check ours. Both were fulling charged on September 5th and now are at 42 and 46 percent. Something up.
I purchased both Teric’s from DiveGearExpress in May 2018. We dove in June, July and September and then stored until June 2019. On our trip in July battery life wasn’t very good, Maybe 50% left at the end of each day and now less than 50% after sitting 15 days. I hope the batteries are inexpensive or free.
One factor that can make a substantial difference is whether or not the compass function is enabled.
That is still under warranty, contact Shearwater and see if they agree that 25% a week is too high (they probably will). I am sure that they will make sure you are satisfied.