Capacity of batteries «Carrefour I-tech (second test)» - detailed results

Data: Brand / Model Carrefour I-tech (second test) Price 1.02 € Alternative packagings — Expiry 12-2019 Origin China Store Carrefour Starting voltage 9.27 V Average voltage during discharge 7.57 V Measured capacity (main discharge) 515 ±1% mAh Energy 3.90 W·h Date of measurement 23 Dec 2015

Notes:

This battery, along with its near-identical twin, were bought within 2 months from one another, from different Carrefour stores. They are closely related: both are stated to expire Dec 2019 and are identical visually. Yet both the price and the performance are significantly different. This one, bought Dec 2015, costs just ~€1 and gives out 515 mAh. The other one, bought Oct 2015, costs ~€1.50 and clocks 565 mAh.

I'm unconvinced that the price has any effect on the performance, though. It's more likely to be a manufacturing variability, or they were exemplars of different production lots.

Test results

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