Specifications
The EL-531XT performs scientific and statistical calculations with an internal precision of 14 digits. It can hold 24 pending calculations and 10 numbers, or 5 numbers in statistics mode. It is powered by a built-in solar cell with a 1.5 volt alkaline backup battery, type LR44 or equivalent, which lasts about 5000 hours on its own. The operating temperature is 0 to 40 degrees Celsius. It measures 80 by 161 by 15 millimetres and weighs about 105 grams with the battery. The box contains the calculator with the battery installed, the manual, the calculation examples, and a hard case. And it turns itself off after about 10 minutes without a key press.