Recharge the batteries?

I have a Canon EOS Rebel T5. I recently bought a couple of spare batteries. Is this a good idea some recharge before use? How long a full battery lasts if it is not in the camera?

If batteries remain unused for 3 months or more, partially reload them (to about 30-70% of capacity, according to expected shelf life), then store the unit to avoid damage (cover the contacts and keep ambient temprature.  Remember to never touch or short the contacts at any time).  If contact must be cleaned that I usually use a pencil eraser but more modern contacts are golden and don't need cleaning. You may need to take the storage device and load again after a few months.  If you know you will use a lot I suggest to load completely well.

With my T6i, that I did not run out of battery again while in the field, so I didn't need an extra battery.  The longest in the field was a two day trip to Zion National Park in Utah, and I have had battery remaining.  I don't use a lot of live view and have not turned video much since I bought my camera a few months ago so I don't really put the battery to its test yet. The screen using LCD naturally drip the battery more quickly. The good thing about Lithion-Ion batteries is you can "top it off their" 100%, no matter where the charge level is at night before you go out.  This gives you peace of mind knowing that you are out of the door with a full battery (of course if you have an extra you don't have to worry as much).

Tags: Canon Camera

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