Different brands of size 'AA' batteries were tested in a GPS receiver to see how their capacities compared.
The receiver was switched on and the trip time reset to zero. The receiver then ran, in a stationary position, until low battery voltage caused it to shut down. On power up again the time the receiver ran was noted in hours and minutes - see below. The longest lasting battery was the Duracell Plus Alkaline at 14 hours and 26 minutes. The longest rechargeable was an Energizer NiMH 1700mAh at 13hours 43minutes.
Rechargable Batteries:
Energizer NiMH 1700 mAh:
1302, 1343
GP NiMH 1800 1750 mAh:
1320, 1338
Uniross NiMH 1700 mAh:
1239, 1314, 1235, 1314
Uniross NiMH 1700 mAh:
1239 1500: 953, 941, 946
Uniross NiCd 800 mAh:
617, 610
Alkaline Batteries:
Energizer: 1318
Duracell Plus: 1426
Tesco: 1240
Zinc Batteries:
Okkaido: 0044, 0050
Disclaimer: The results are indicative only and done with a small sample.