I can recommend the video The science of catching up in life

I have a epson EcoTank printer and I really really love it.

The Ink is cheap and very good. I will never go back to cartriges.

I always wondered if this is possible.

I had a 4 year old phone that I had to charge twice a day. I figuered I switch the battery with an official branded replacement which had costed around 100€. The difference between the old and new battery were unnoticable and I still had to charge the phone twice a day.