Or does this watch really cost about $150 to wear per year?
It's relatively easy to replace the battery:
The battery has part number of: LSSP482230AB
Has anyone gotten any 3.7V batteries to work? There are some cheap ones for RC helicopters that are about 5 for $10. I saw there was another thread about higher capacity replacement. I'm not sure, but the last post mentions having batteries of the same voltage, so I guess that means the 3.7V batteries don't work? I can't find any inexpensive 3.8V batteries that are small enough to fit the gear.
So I was able to find a much cheaper option. I found a $2.35 (us dollars) 3.7V battery that works. It's smaller capacity (240mAh), but seems to last reasonably long (went from 100% to 63% in a 24 hour period). I had to cut the connector from the original battery and solder it onto the top of the replacement battery. You can pull the existing connector away from the battery and cut as close to the battery as possible to leave enough of the metal to solder to the replacement battery. I posted a picture on i.imgur.com/fUZD6Re.png (can't post pictures yet) You'll also have to desolder red and black wires on the new battery before soldering on the old connector. Make sure you keep the polarity the right way around when you solder the connector to the new battery. (red wire is typically + and black is -). Here's what the new battery looks like (from the back) once the soldering is done and the connector is pushed back into place i.imgur.com/2jHv7ly.png
I kept a close eye on the watch the first time I charged it and the battery didn't get too hot to the touch. It's been a few days now and it's gone through a couple of charge cycles and seems OK. I don't have enough cred on this forum to post a link to the battery I bought, but if you do a google search for the following, it's one of the first links that comes up:
3.0 cm x 2.0 cm x 0.5 cm 240mah lion 3.7v battery
|battery replacement, galaxy gear|
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