I need an instruction manual for the callaway lr550

Contact Callaway support. http://www.callawaydmd.com/product-support
1-888-606-4634
There is some question whether the watch itself is yet available much less the charger. TGW says it is no longer available but Walmart declares it is selling it. Callaway licenses their name to it but is not the manufacturer. I don't know if chargers for the rangefinders are compatible with the watch. You might ask Callaway support. If so, Newegg sells (Amazon has a variation) such: https://www.newegg.com/callaway-upro-mx-upro-mx-golf-electronics-accessories/p/2TK-000F-00001

https://www.manualslib.com/manual/928378/Callaway-Gpsync.html?page=15&term=time&selected=11

https://www.manualslib.com/manual/1326662/Callaway-Golfit-Hr-Band.html

Second link is probably the one of interest to you. The first link is for for the GPSynch watch.

try epoxy glue or contact the mfg.

If your is genuine [email protected].
Otherwise to report a suspected counterfeit product, please email [email protected].

I would google for the instructions by model number "manual"

I also lost the battery cap for the LR550. I signed up for an account on Nikon.com and asked how to get a replacement through the "Service and Support" section. Very delighted to report that they immediately FEDEXed a replacement part - free of charge!!!
Love my range finder, disappointed that the cap fell out but impressed with the service. Will put some tape over the battery cap from now on.

You may download a copy of the manual from Nikon's support site here.

Hi,
Welcome to Fixya. I provided a manual below so that it will help or guide you on how to sync you callaway upro.
Callaway uPro manual
If you have questions please let me know. Thanks

mcdevito75 here, You can try to contact useing the info in the instruction manual or at your watches name plus.com and see.

http://support.nikontech.com/app/answers/detail/a_id/14466/kw/lr550/r_id/116678

Other model for Nikon rangefinders are here also.

MTG