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2 Answers

These calculators run on AAA batteries and cannot be charged. The battery life is however quite long.  You shouldn't need to replace the batteries very often.
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you get AAA rechargable batteries (duracell works best). then you buy the charger.

(duracell chargers come with AA batteries, since it can also charge AA batteries. next puth the batteries in the charger and wait 6-8 hrs until charged. (the charger is about $15 and batteries are about $7.50
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