How to do a full cycle charging on iphone 4s?

This apps Battery Doctor recommend to do full cycle charge but there wasn't any instructions to do a full cycle charge. I tried to charge overnight when by battery level showed about 26%. Can anyone enlighten.

Let you battery run all the way down to 0% at least once a month then charge instill it get 100% that's how you do a full cycle charge.

Charge your battery to 100%, and allow it to drain all the way too 0%. If you do this all the time, the overall battery life will be much longer.

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