Tiny, tiny USB connector

[Channel Hopper]

Nothing in the links shows a replaceable battery, and whilst the watch is large, it's not large enough for a standard mobile pile.

I'll delve inside tomorrow morning after a strong coffee, with a magnetic tray at the ready.

 

[Channel Hopper]

Took the back off and it does look like the battery is beyond help, a bit lumpy but at least it hasn't leaked into the circuit.

ImageBam

It's a 3.7V pile with a connector that looks suspiciously like the ones used on micro flying machines/helicopters.

 

[2cvbloke]

You can get those batteries for nowt on ebay, sometimes cheaper when contained within something (but that's a gamble as to what size you get), but it's replaceable...

If you hooked up the battery wires, once cropped off the battery itself, to a 3.7v power supply (such as a bench power supply) you can test to see if the watch actually powers up or not, saving the need to buy a battery if the thing's copped it...

 

[Channel Hopper]

I could use an olde Nokia mobile psu they were 3.7v from memory.