Rayovac 399 1.5 volt Silver Oxide Watch Battery (SR927W, AG7, National GR927, SR57, SR927)

Rayovac 399 1.5 volt Silver Oxide Watch Battery (SR927W, AG7, National GR927, SR57, SR927, RW413)

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.

You can buy these batteries in boxes of 10 and save 20%, that’s 10 batteries for the price of only 8! Click Multi-pack for a box of 10 and save money.

Chemistry: Silver Oxide (non-rechargeable)
Capacity: 55mAh
Height: 2.6mm
Diameter: 9.5mm
Voltage: 1.55V
Weight: <1g

Also known as: AG7, D399, 613, 280-44, SB-BP/EP, SR57, SR57H, SR927, SR927W, GR927, TR927W, V399, W, SG7, SP399, 543, S19, 1165SO