http://www.batterybackupguide.com/blog/do-dual-power-calculators-need-battery-changes/ Thu, 17 May 2012 21:37:34 +0000 http://wordpress.org/?v=2.7 hourly 1 http://www.batterybackupguide.com/blog/do-dual-power-calculators-need-battery-changes/comment-page-1/#comment-307 Pete D Sat, 17 Jan 2009 09:01:12 +0000 http://www.batterybackupguide.com/blog/do-dual-power-calculators-need-battery-changes/#comment-307 All batteries will eventually need to be replaced. it is not hard if you have a basic set of jeweler's tools (little screwdrivers). However, the dual power calculator battery life will vary depending on how much you use it in dim light. Most batteries will last a couple of years o so, unless you leave it on for long periods of time in a backpack. All batteries will eventually need to be replaced. it is not hard if you have a basic set of jeweler’s tools (little screwdrivers). However, the dual power calculator battery life will vary depending on how much you use it in dim light. Most batteries will last a couple of years o so, unless you leave it on for long periods of time in a backpack.

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