When should I recharge the Sense?

[WehuttyWanker]

Should you periodically "top up" your Sense's battery as it discharges, or wait for it to almost completely run down before charging?

Moderator Edit: Clarified subject

[SunsetRunner · Accepted solution]

I normally put mine on charge when it notifies me at about 25% battery left.

[SunsetRunner]

I charge mine every other day when I shower. This keeps it nicely charged. Googling your question, the general consensus seems to be that there is no advantage in letting on of these newer batteries run almost completely down before recharging. 

[Rich_Laue]

That is a good question.

In general the battery is good for X number of charging. 

A lithium battery doesn't like being charged to100%, Tesla stops at the recommended 80%. 

Lithium batteries also do not like it when continually going much below 30%

[CBV2]

Just reading an article on the web (https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries) This article referred to another article from this site which states re Li-ion batteries - "the battery lasts longest when operating between 30 and 80 percent SoC".  I tend to charge when my $age drops below 30% and finish charging when I think about it, which is normally in the 90% range. Typically every three or four days, or in the worst case when Fibit reminds me, which is at 25%.  

Incidentally, and not on topic, I looked at the site because of other interests, and I noticed the following remark, In 2020, small wearable batteries deliver about 300 cycles whereas modern smartphones have a cycle life requirement is 800 cycles and more which suggests that our fitbits are good for 2-3 years.  Depending how much you use them of course. 

[CBV2]

this thread is about when to top up your battery, and not the extent of charge the Sense will hold.  There are other threads that discuss that issue, at length. I suggest you look at those threads for a discussion of that topic.

[marksurry]

I pop mine on the charger most mornings whilst making myself clean and beautiful.  This usually takes around 20 minutes which I find holds its charge between 70% and 90%.

[WehuttyWanker]

I am just "topping-up", it's not that it really has to be charged.

[Rich_Laue]

@ange9875 up to 6 days, normal use and without an all ways on display, but without using GPS. Fitbit recommends topping up after using GPS. 

Also some clock faces will use more power then others. 

As mentioned. This thread is not about how long the battery lasts, but when is the ideal time to charge the battery. 

[sanman202]

It also shows when change to always on display on the watch itself that you will get about 2 days. If one is getting only two days without much notifications, always on display off, and not using GPS then there could be an issue. 

[ange9875]

if you have a fit bit sense, the battery should be lasting 6 days +. If it
is not then the product has been falsely promoted. I bought it for the
sensors and the battery life.