i don't know if it was posted before but it seems to me a helpful link...

http://ftp.casio.co.jp/pub/world_man.../en/qw2597.pdf

here you can find the spec in order to buy a replacement battery when your secondary or storage battery for solar power it's faulty.....

and of course a general manual for G-shock though solar watches...

don't say to no one guys but...
i bought a G5500...

pics will come when i will have it between my hands...
thanks to colinman.77
for the watch...