The battery on my polar heart rate monitor seems to have died, after
~550 hours of use. Polar expects you to send the monitor in for
replacement but at this point it's off warranty anyway. Last time it
took like 3.5 weeks to replace, which means I wouldn't have it back in
time for a cycling trip in the French Alps next month... Does anyone
have experience replacing the battery? I assume I just unscrew the 4
screws on the corners and change the battery...

df