If you are replacing a National GR927 battery in a Casio calculator please note that your calculator handbook is likely to say that
this is a lithium battery. The handbook is wrong! The replacement for the National GR927 is the 399 silver oxide battery and not
the CR927 3V lithium battery. This mistake in the handbook appears across several different models of Casio solar calculators.
Note: CR/BR (Lithium) battery types are 3.0 Volts.
Your Battery not listed? Try our applications page to see if someone has bought a battery for the same device you have or
send us an email using our contact form with your requirements and we will
email you a response within one working day.