I bought the instinct solar about 3 months ago. First month the battery lasted about 25 days. I had the heart rate on 24/7. GPS off and exposed to quite a large amount of direct sun. Second month no change. However now the battery only lasts 3 days. There is much less sun. Iam doing more exercising but this is all indoor stuff so no GPS. About 3 times a week up to 1 hoir at a time. I still have heart rate on 24/7. Pulse ox is off and as far as I can work out I’ve turned down or off any functions that I do not need / use but still no effect on extending battery life. Any suggestions or solutions? As far as I’m concerned Garmin customer service is not great. First contact they just sent links to the manual. Second contact they did the same. Not impressed by this as they should have given me specific advice or basically said to return the watch. Anyway, any advice would be appreciated. Thanks.