battery life

Hi, which has the biggest impact on the H batteries lifespan? Age or nbr om charges/discharges? I have 3 Yuneec original and one Giffi 8050mA. They are all almost 3 years now and none is yet puffing or drained/flewn under 14.5.

I did a little road trip today to catch some fall foliage and had this very unusual problem with my Typhoon H. The drone was rising and falling very slowly. Like really slow. I was flying in somewhat high altitude, (7000 ft), but wouldn't think this would have any effect. And my battery life...