A:AnswerI've no issues regarding the unit holding charge but I do believe it was a mistake ever buying the Charge 3!!!!
Even with wearing glasses the display is very difficult to see, I find it only good to track steps and view them on my phone.
If Best Buy stores were open I would have taken it back. I have logged a complaint with Best Buy and to date I received NO reply.
A:AnswerYes, I believe it has enough memory to track minute by minute data for up to 7 days. I've never had a problem with losing any data except for when I've forgotten to recharge and the device turns off.