GA-1000 short battery life. I replace the batteries in it less than a year ago and the battery is already dead. The batteries that came in it lasted just over a year.
Screw Set for GA-1000 Casio Watch Strap Band (Qty 4)
i will show you how to change the battery of casio g-shock gg-1000 - YouTube
CASIO GA 1000 Watch battery replacement - YouTube
How To Change G-Shock GG-1000 Mudmaster Battery and Time Setting | Relojes | SolimBD - YouTube