What's battery capacity (in mAh) for Fenix 6X, 6, 6s ?

Ya Garmin doesn't say what it is, but going off what I've seen online about previous Fenix models, it seems like the 5X models (and probably also 6X) use something around 500mah. I would assume that since the 6 has 66% of that battery life, and the 6S has 33% that battery life, that those models have roughly 330mah and 165mah batteries, respectively. Give or take.

If you're wondering what size battery pack to get for charging your watch with, it really doesn't matter. Any battery pack is going to charge the watch many times. Even a cheapo $5 "lipstick" battery pack is going to charge a 6X at least half a dozen times. So I would say, get the smallest and lightest battery pack you can find, and it will be more than enough.

I did measure the charging when the battery was down to 1%. Charging to 100% showed 424mAh and 2182mWh. That's a fairly big battery size for a smartwatch, e.g. 205mAh for Apple watch.

Actually after a quick serach I found this teardown post on 6X:

http://www.f-blog.info/garmin-fenix-6x-pro-disassembly-or-teardown-whatever-you-say/?fbclid=IwAR3MeFcYqoR_ozgizZcYgjqHj6pD6BNTqhLrg4dEg2f6FRKSE8ioFb9qzl8

Not a bad measurement. The battery reads at 420mAh in the photo:

Thanks for the link! It's very interesting. 

But how about Fenix 6X Pro Solar?

According to Garmin specs. capacity should be the same. So, in this case, battery capacity should be equal for 6X Pro = 6X Pro Solar. 

What do you think?

My measurements come from a 6X pro solar, but My guess is that both version are the same with the difference in the screen.