I'm still using my Nokia N900. It lasts a few days on battery and there's still nothing better on the market, although I sometimes carry an old Galaxy S3 to access banking app or to buy public transport tickets - however, I sometimes have to do without them when its battery is flat :P

My n900 had usb charging trouble, and i had to get a "universal" battery charger, and alternative batteries. I have even recased it - it is surprisingly user-friendly in regards of repairs. However, i'm not nimble enough with the soldering iron, so it gave way to jolla first, and finally i succumbed to s8 later on, because swapping the batteries is just an ordeal. Loved the thing madly, tho.