Why are alkaline batteries (AAA or AA) made to be 1.5V while rechargeables are 1.2V?

In practice, alkaline batteries and rechargeable batteries can be used interchangeably in sets. They have only different voltage characteristics.

Why aren't there Lithium Ion rechargeable batteries in AA and AAA sizes? - Quora

1.5V AA AAA Rechargeable Alkaline Batteries 3000mAh 4-Solt Battery Charger LOT – ASA College: Florida

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Capacity: 3000mAH. It is easy to cause the second charging effect of over playing movies. Chemical type: alkaline. Color: green.

1.5V AA AAA Rechargeable Alkaline Batteries 3000mAh 4-Solt Battery Charger LOT

Coast Alkaline Battery AAA Industrial Performance:Lab Electrical Equipment: Batteries

HiQuick AA & AAA rechargeable batteries review: hi NiMH, goodbye alkaline

PremierPro Alkaline Batteries (9V, AA, AAA, C & D) – stockd

The Truth of 1.5V Rechargeable Lithium Batteries_ShenZhen XTAR Electronics Co., Ltd

AA vs. AAA Batteries: 7 Ways They Are Different - History-Computer

Is Every AA Battery the Same? Which Should You Use and When?

MDHAND 16Pcs 1.5V AA rechargeable battery alkaline battery Suitable for razor, LED lighting, wireless microphone, cordless phone, etc.

These batteries charge off USB-C : r/mildlyinteresting