Apple iMac with 4K Retina display (21.5-inch, 2015) review: Apple packs more pixels into its smallest iMac - CNET
Portable AA Battery Travel Charger Compatible with Apple MacBook Pro 2018/2017/2016/13"/16"/iMac with LED Light! (Takes 2 AA Batteries,USB Type-C) [WHITE] - Walmart.com
Ultralife LS14250C REPLACEMENT G5 POWER APPLE MAC LITHIUM 3.6V IMAC BATTERY | eBay
2021 MacBook Pro teardown reveals easy-to-remove batteries | Engadget
iMac box has battery icon? : r/mac
How to check the keyboard, mouse, and trackpad battery level in macOS | Macworld