# Charging time of lithium ion batteries

I am charging a 430mAh lithium polymer battery at 1C using BQ24232 charger IC (from Texas instruments). The charge terminates within 1 hour 20 min with battery voltage showing 4.17V. On research I came to know that it would take a little more than 2 hours to complete the charge cycle when charged at 1C.

Why does my battery charges so quickly at 1C?

• 1C = full charge/discharge in 1 hour. Where did your estimate of 2 hours come from? May 20, 2016 at 12:06
• And why would it take more than 2 hours? May 20, 2016 at 12:06
• 80 mins charging time for the battery of that size is perfectly normal. May 20, 2016 at 12:32
• @Cheibriados, I believe 1C means the charge current is 1 times the battery capacity. For example, the 1C charge current of a 2000mAh battery is 2 amps. The 0.5C charge current of a 3000mAh battery is 1.5 amps. May 20, 2016 at 12:43
• @st2000, you are correct w/r/t C-rate, but my point is the same; 2 hours seems arbitrary and without knowing where it comes from, the question is nebulous. May 20, 2016 at 12:48