http://www.outdoorlanternsonsale.com/need-battery/
Do dual-power calculators need to change batteries?
Is a dual power calculator (ie, calculator works solar energy and battery backup for low light conditions) never need to replace the battery? Or is it the battery of solar cells to eliminate the need for a battery change? I avoided dual power calculators in the past that I do not to change the battery if I did not do it. Thank you.
All batteries will eventually need to be replaced. it is not difficult if you have a basic set of tools jeweler (screwdriver bit). However, the life of the dual power calculator battery life will vary depending on how you use it in the dark. Most batteries will last a few years o so, unless you leave it in place for long periods of time in a backpack.
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