Anker 20,000mAh Power Bank — $50, Near All-Time Low

Anker's best-selling 20K portable charger with built-in USB-C cable is just $50. Price history: launched at $70, held steady through summer 2025, dropped to $55 during Prime Day, hit the all-time low of $45 briefly in October, and has been $50-55 since. At $50, you're within $5 of the record low. Features 87W max output (charges a MacBook!), built-in USB-C cable, 3 ports, and enough capacity for 4+ full phone charges. Over 6,000 five-star reviews.