What size battery does a Nixon Newton watch take? Having trouble finding info online and want to order a replacement. Thanks!

Pull the battery out of the watch, the number is stamped on the battery negative side, go on eBay and find the battery.

SR626SW

you can do online search or notify manufacturer

A jeweler will be able to get the right size in there. Most jewelers will do it for the cost of the battery.

No that is not a problem, it is quite normal and nothing to worry about. The dot indicates battery condition.

if you still can see the stem near the hole of the watch, you only have to replace its crown. but if not you have to replace both. i hope i had been helped you.

This is called spring bar or spring pin. You can buy these on ebay. Make sure you get the right size. The distance between watch lugs is the right size. Measurement must be taken in mm.

Here some tips to deal with a Nixon Lodown:
1) Sleeping mood (display is off, all buttons lead to the same reaction: display shows time for some secs and then turns off again. This mode is for battery energy saving, switch it on and off by holding (c.a. 2 secs) the light button.
2) ROM FAIL: it happens that the lodown shows ROM FAIL and constantly restarts. It happened on my watch while I tried to change time zones. Here is what to do about it: Bring it to a professional watch repair store and get the battery replaced. The watch restarts automatically and works perfectly fine again. DON'T send it to Nixon, they will charge you for shipping, battery replacement, the new battery etc. Although it should be covered by the guarantee. Just get a new battery, it cost me 16 USD and the watch is good again, waterproof and works perfectly. Nixon authorized repair centers will charge you extra for pressure testing. I had this on my second Lodown, after I had it two weeks only...
3) Watch freezes: All digits are on at the same time, none of the buttons brings a reaction. I had this problem on my first lodown. Just get a new battery, that solves the problem. But again DON'T use authorized Nixon repair centers, it costed me almost 45 USD, just to get a new battery. Although the watch was only 1 year old and guarantee should have covered this case.
In general the Nixon Lodown is a good watch, looks good, has all features you need, as long as it works. The problem with the watch is, the above problems occur pretty often. I have my second Lodown now and I am very disappointed with the Nixon customer service. Although clearly guarantee cases, they will charge you for every single problem you have with the watch. My advice, bring the watch to a regular watchmaker.
After all, I don't understand why the Nixon Lodown manual does not mention all the above issues. The manual is completely useless, very poor from Nixon. You have to dig online to solve any issues on the watch. In summary: The Nixon Lodown watch is good, Nixon customer service and guarantee is a joke. ROM FAIL and freeze is solved with replacing the battery.