Rechargeable AA battery has a built-in USB-C port for easier charging - Yanko Design
Briefly

The Nitecore NH2400 AA batteries redefine convenience in power storage with their integrated USB-C charging capability, eliminating the need for traditional bulky chargers, while meeting modern user expectations.
No more bulky chargers—Nitecore's design features USB-C ports on batteries, allowing direct charging, a significant leap in user-friendly battery technology that aligns with current consumer habits.
Read at Yanko Design - Modern Industrial Design News
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