The transcript discusses a study comparing the energy capacity and cost-effectiveness of 18 different battery brands across various price ranges. The study measured the energy each brand could store and its cost per unit, revealing that low-end batteries often provide better value than high-end ones, except for a high-performing lithium technology battery. The speaker advocates for standardized capacity measurement by manufacturers to aid consumer choices.
Here are the key facts extracted from the text:
1. The study tested 18 different battery references from various brands.
2. The batteries were categorized into three groups: low-end, mid-range, and high-end.
3. The cost per unit of each battery was calculated by comparing batches of 6-8 batteries.
4. The low-end batteries had an average price of 24 centimes per battery.
5. The mid-range batteries had an average price of 51 centimes per battery.
6. The high-end batteries had an average price of 1.34 euros per battery.
7. The study measured the capacity of each battery using a standardized protocol.
8. The capacity of each battery was measured by discharging it with a constant load current of 0.5A until a cut-off voltage of 0.7V was reached.
9. The measurements were taken on three batteries from each reference to ensure accuracy.
10. The study found that the low-end batteries had an average capacity of 1100 milliamper-hours (mAh).
11. The mid-range batteries had an average capacity of 1200 mAh.
12. The high-end batteries had an average capacity of 1233 mAh.
13. The study also calculated the capacity per euro for each battery, with the low-end batteries having an average of 4729 mAh/euro.
14. The mid-range batteries had an average capacity per euro of 2700 mAh/euro.
15. The high-end batteries had an average capacity per euro of 1233 mAh/euro.
16. The study found that the Energizer Ultimate Lithium battery had the highest capacity, with 3154 mAh.
17. The study also found that the Energizer Power and Max batteries did not perform as well as claimed, with capacities of 1130 mAh and 1043 mAh, respectively.
18. The Varta battery had a capacity of 1235 mAh.
19. The study concluded that buying high-end batteries is not necessarily worth the extra cost, as the capacity per euro is often lower than that of low-end batteries.
20. The study suggested that battery manufacturers should use a standardized protocol to measure capacity and disclose this information on their products.