Out of 8 Ratings

Owner's of the Casio Calculator fx-115ES gave it a score of 4.4 out of 5. Here's how the scores stacked up:
  • Reliability

    4.38 out of 5
  • Durability

    4.5 out of 5
  • Maintenance

    4.38 out of 5
  • Performance

    4.5 out of 5
  • Ease of Use

    4.0 out of 5
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1 Press 1A (OFF) to turn off the
•To ensure that you do not
accidentally turn on power while
replacing the battery, slide the hard
case onto the front of the calculator.
2 On the back of the calculator, remove
the screw and the battery cover.
3 Remove the old battery.
4 Wipe a new battery with a dry cloth,
and then load it into the calculator with
its positive
side facing upwards
(so you can see it).
5 Replace the battery cover and secure
it in place with its screw.
6 Perform the following key operation:
•Make sure you perform the above key operation. Do not skip it.
Auto Power Off
Your calculator will turn off automatically if you do not perform any
operation for about six minutes. If this happens, press the O key to
turn the calculator back on.
Power Requirements:
Solar Cell: Built into the front of the calculator
Button Battery: G13 Type (LR44) × 1
Battery Life: Approximately 3 years (Based on one hour of
operation per day.)
Operating Temperature: 0°C to 40°C
Dimensions: 12.2 (H) × 80 (W) × 161 (D) mm
/2Љ (H) ҂ 3
/8Љ (W) ҂ 6
/16Љ (D)
Approximate Weight: 105g (3.7 oz) including the battery
Bundled Items: Hard Case