How many spare batteries do you need?

Started Apr 28, 2014 | Discussions thread
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Re: How many spare batteries do you need?
In reply to mep, Apr 28, 2014

You should obtain as many battery packs as you can use regularly, but no more. Lithium Ion devices, such as the BLS-5, age significantly regardless of use. The clock starts ticking as soon as they are manufactured.

Some papers on the subject suggest a loss of 20% capacity per year, so it is stupid to purchase spare packs which sit on the shelf unused. Use them today and enjoy their superior performance to other battery technologies. Then, in a couple of years when they have lost a significant portion of their capacity, replace them.

I typically use four packs per camera body (E-M1 with battery grip), which equates to two in use and two in reserve.

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