I contacted Garmin support to check if they could supply a replacement part after the D ring that closes the battery compartment on the back of my GPS broke off.
Much to my surprise and delight, not only did they send me a replacement part (a new back), they did so completely free of charge - not even charging for postage or packing.
Since I've had the GPS (Etrex 30) for quite a few years, this was excellent service. Thank you Garmin.
P.S. Other walkers may do what I have done up to now and put a cord through the D ring to secure it to their belts, to prevent the unit (or at least the back
) from falling inadvertently and getting lost. However, with hindsight, I suspect this may have contributed to the problem. It's best to get a lanyard that threads through the intended small retaining holes at the GPS base.