I am trying to calculate the charge time for the nordic thingy 91. I followed this website to calculate the charge time but ~13 hours just did not seem right to me. Can someone let me know if I am on the right track for calculuating this? I have attached my calculations, the link for the thingy, and the website where I got the calculations. The battery capacity is 1440mAh.
-nordic thingy 91