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Sudden high battery drain, lagging

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Started seeing abnormally high battery drain on my Sense the other day. It's two years old and I use it daily, so there's going to be some wear. Typically it goes down to 50% now after about 2.5 days. Yet all of a sudden it now drains from 100% down to 10% in about 8hrs, with it becoming progressively less responsive. It'll work fine for a bit after a reboot, but over time switching between screens causes it to freeze up for a few seconds, and the touch display starts having trouble recognizing inputs. I've rebooted it several times, charged it to full, even did a factory reset and FW update, but it still has the same issue. Just been using it like normal, so it's not like it's been damaged or anything. It's running Firmware 44.128.6.17. 

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Good to see you for the first time in the community @mmntech.

Thanks for providing the details regarding the inconvenience with your Sense and the troubleshooting steps performed until now.

Before considering other options, have you checked the steps listed here in order to avoid battery drain on your device?

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Yep, I'm familiar with the battery saving options. Thing is the drastically reduced battery life and laggy watch performance developed suddenly without me making any changes to its settings. 

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Dear Fitbit

After the latest firmware update to my sense wherein the 'all day sync' has been turned on and there is no option to turn it off, the battery life of my device has come down from 6 days to just about 1.5 days. Absolutely ridiculous. Why are you forcing us for an all day sync.

Please immediately restore the option to turn off the all day sync.

And please don't sell me the crap regarding battery saving options. They are not going to work.

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