After more than ten years, the battery in my Casio ProTrek PRW-1500 solar powered watch was not charging as it should and not giving enough power to provide full functionality despite showing an H [High] symbol. After much research I found this was the required battery and made the purchase.
https://www.amazon.com/Panasonic-CTL1616-Rechargeable-Replacement-Casio/dp/B0080GQBTU

