Go to Amazon and you will find all the accessories you can shake a stick at for the 820. You can still even get a 820 from them for about 200$ new and unlocked, wireless charging back covers in several colors, bluetooth devices, earphones, protective covers for the phone, protective covers for the screen, car chargers, wireless charging stations, extra batteries, SD cards in a ton of sizes, and etc, etc. AS far as the battery, I get 1 day and 13 hours adverage usage out of my phone and that is over a year and four months of tracking it. Not bad for a 1650 battery. And remember this phone has the same insides as the 920/925/928/1020, with a much smaller battery. I think it does pretty good if we do our part and set things up correctly. It even has glance screen.