My battery last 5 days top #3656
Replies: 25 comments
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Posted at 2021-12-27 by Poolitzer What are your "unlock/light up LCD" settings? |
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Posted at 2021-12-27 by user137767 brightness 1 |
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Posted at 2021-12-27 by johan_m_o I've pulled down my LCD brightness to .5 (I find that more than enough with the reflective display), changed Twist threshold to .2 and Twist timeout to 500. Using the Anton clock and always connected to Bluetooth. I don't use any pedometer or heart rate monitor stuff. Easily lasts 7-10 days wearing it from getting out of bed until going back to sleep. Edit: maybe the wake on touch turns on the display a lot, unintentionally. That could really impact battery life. |
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Posted at 2021-12-27 by Tx I think the wake on touch draws a bit just by the active sensor. Try wake on twist and button. |
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Posted at 2021-12-29 by HughB I get about 10 days with only wake on BTN1 enabled. All other wake ons disabled, No heart rate monitor and LCD set to 0.1. |
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Posted at 2021-12-31 by user137767 I changed the settings as suggested by users but I still get the same poor battery life. |
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Posted at 2022-01-05 by @gfwilliams That is surprisingly low battery life - have you installed a clock face other than Anton? It's entirely possible that some clock faces really drain the battery hard. But the bluetooth connection could hurt battery life - usually it goes to a low power mode after 1 minute of inactivity but if stuff is being transferred it'll stay in the high power mode which draws 1mA, which would fit well with you 8 days battery life. It is possible to force it to use the low power connection mode all the time, so I guess that could improve things for you. If you install the 'Custom Boot Code' app and paste in:
That'll use the low power mode - BUT subsequent app uploads will be WAY slower until you delete the app again. |
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Posted at 2022-01-06 by andrewg_oz Just a slightly related note, after I drowned my Kickstarter Bangle JS2, I found an Alibaba link to a ~$50 sample Q3 from SMAWatch. I think I got lucky because the price at the link promptly went up to $200 after I placed my order! Anyway, the sample I got is lucky to run for 16 hours before it dies. My drowned KS was still operational, except for its button, so I was able to compare the two. The new sample one was running about 3degC hotter according to the internal temperature sensor, and had a case temperature about 1degC hotter according to my FLIR camera. That 1degC difference remained even when I turned them both off. Although that test was a mistake because now I can't turn my KS Bangle back on because the button doesn't work :-( The shorter run time is clearly due to excessive power consumption by something. It's possible (probable?) that production variations are behind this issue. |
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Posted at 2022-01-06 by HilmarSt
I've experienced with my FLIR that such a small temperature difference can be caused by different reflectivities of the surface or even the thermal reflection of the own body or the angle of it to the object. |
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Posted at 2022-01-06 by @fanoush
I'd guess it is far more probable that it is some software issue. 16 hours vs weeks is not due to 'production variations'. 16 hours means it does not sleep. You had to unlock it via SWD and flash your custom build. Which tool you used to do that? Using SWD via openocd keeps the debug hardware powered so it will die soon unless you know the magic to power it off at openocd disconnect time ( Or does it happen again even after battery is completely drained? Then it is not SWD but something else (probably still software). Can you share full hex file you flashed after unlocking that has this issue? |
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Posted at 2022-01-07 by andrewg_oz
I'm aware of that. I was looking at the two watches side-by-side and the temperature difference was always apparent from different angles. Regarding my 16hr Bangle, it doesn't charge up to the same voltage reported by my KS Bangle (readAnalog(D3) is 0.293 vs 0.341). The original Swawatch Q3 firmware never reported above 56%.
I flashed the following using the drag-and-drop functionality of the nRF52DK: Edit: The watch has now fully discharged several times (easy when it only lasts 16hrs), so I don't think it's the SWD. |
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Posted at 2022-01-07 by @fanoush
so you still have two watches that you can do same steps with (mass erase, flash same hex) and they behave in different way? anyway, looks like bad battery to me if it does not charge fully and drains fast. or something wrong on PCB that leaks current also as you previously mentioned if you do power off from bangle settings menu which puts cpu and other hardware to deep sleep and it still dies in this poweroff state in a day then maybe you indeed got a lemon from SMA |
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Posted at 2022-01-07 by @gfwilliams
This is quite possible I'm afraid. While I'm sure there are some Q3s kicking around especially in distributors, right now I believe I'm ordering pretty much everything SMA have - to the point where they're not even able to ship out the full amount of units that I ordered. I'm actually quite surprised they are still offering them. |
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Posted at 2022-01-08 by HughB @gfwilliams - I'm wondering under what configuration you were confident to say 4 weeks battery life on the Kickstarter. I've never seen more than 10 days. My config is usually
Should I be turning BLE off in order to get the 4 weeks ? Does BLE power make a lot of difference ? I notice I can have 1 Bangle 2 upstairs in the bedroom doing nothing but I can setill connect to it via my chromebook in the living room 2 floors away. Definitely going to experiment with turning bluetooth off. I wondering if the BLE boot power level could be a setting in the settings menu? I know GPS draws a lot, so if I use that I expect to have to charge it same or next day. As an experiment I ran my battery down in 6 hours by leaving the GPS on. Is there a list of what current different things draw ? Eg a 1 minute clock draws x, a 1 second clock draws y, connection to gadgetbridge draws zMa, Is it possible to measure the current draw externally without openning up the watch ? |
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Posted at 2022-01-08 by ThomasVikström An anecdotal observation: |
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Posted at 2022-01-09 by HilmarSt
I agree, waking up the hardware with a motion and logging it (to Flash?) will cost a lot of energy. |
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Posted at 2022-01-09 by HilmarSt
Maybe if you measure the current of a fully charged watch with a precise USB amperemeter. I will give it a try later. |
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Posted at 2022-01-09 by Poolitzer
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Posted at 2022-01-09 by HilmarSt Some impressions of current measurements with an USB Multimeter UM25C
Attachments: |
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Posted at 2022-01-09 by HughB Thanks @HilmarSt - good to know. ANy chance you could do a meaurement of installing Apps through the Loader or the IDE ? I would be interested to know what that is like even of it is for a 60 second period. I do a lot of installing , deleting, changing apps. |
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Posted at 2022-01-09 by HughB Thankd @Poolitzer - I wonder what the NON idle accelerometer draw is ? IE walking around. |
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Posted at 2022-01-09 by HilmarSt The accelerometer's data sheet ( https://kionixfs.kionix.com/en/datasheet/KX023-1025%20Specifications%20Rev%2012.0.pdf ) states on page 8: |
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Posted at 2022-01-09 by HilmarSt
I tried it, but it can't be measured with my USB multimeter - an oscilloscope is needed: |
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Posted at 2022-01-09 by HilmarSt
I see no current change on my USB multimeter when connecting the watch in the IDE or in the App Loader - maybe Bluetooth Low Energy needs very low energy ;-) |
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Posted at 2022-01-10 by @gfwilliams There are some detailed power figures at https://www.espruino.com/Bangle.js2#power-consumption
The defaults! Turning on the HRM in the health app will bring battery life down a lot, and while having BLE on shouldn't cause problems, the Gadgetbridge BLE connection probably hurts battery life quite a bit. Usually when you have a BLE connection it's in high power mode (1mA) initially but goes into low power mode after 1 minute (which is about the same, maybe better than having no connection). However because health updates get sent every 10 minutes that'll bump power usage up again for a minute. |
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Posted at 2021-12-27 by user137767
Hello,
I am having an issue with my Banglejs 2...
Most of time I have to charge it every two days.
The battery dies super quickly, compared to the estimated 2 weeks said in the kickstarter.
I dont really have a lot going on in it, just the pedometer. Not really anything else running in the background...
Except for the Android app/integration that has been really spotty for me since the start. Could this be the issue?
Anyone else having bad problems like this?
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