I am now using Toshiba GCP Series for 13 years.
Toshiba GCP series, this is widely available in Greece.
Also named as:
Toshiba HIGH POWER GCP series
Within these years:
I have buy and use approximately 120 cells LR03GCP (AAA)
Along of 36 cells LR6GCP (AA)
I am a rare type of a consumer, two many handheld DMM around me, and I have only two hands.
And therefore Alkaline batteries resistance to leakage, this is Top of importance factor to me.
But I do have and another application, at home and office, as I do own two battery powered weather station, its one has a wireless temperature sensor, this placed outdoor.
Two pairs of LR03GCP (AAA), they do the job for approximately nine months.
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High quality and long lifetime
Safe, powerful and reliable
Excellent resistance to leakage
Superb low temperature characteristics
Best suited for medium to high drain use
POSITIVE ACTIVE MATERIAL: Manganese Dioxide (MnO2)
ELECTROLYTE: Potassium Hydroxide (KOH)
NEGATIVE ACTIVE MATERIAL: Zinc (Zn)
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Over all I am happy with this Toshiba GCP Alkaline, especially when I do not have a single leakage event within 13 years.
https://www.toshiba-lifestyle.com/sites/default/files/2023-11/batteries-english-2023-11.pdf