Capacity of batteries «Energizer Lithium» - detailed results

Data: Brand / Model Energizer Lithium Price 8.53 € Unit price 2.13 € Alternative packagings — Expiry 12-2034 Origin Singapore Store BMB Starting voltage 6.72 V Average voltage during discharge 5.76 V Measured capacity (main discharge) 3100 ±1% mAh Measured capacity (coastdown) 10 mAh Energy 4.49 W·h Date of measurement 21 Jan 2015

Notes:

The Energizer Lithium series batteries utilize a different chemistry - Li-FeS₂. Similar to the other lithium cells in this form-factor tested (Varta Lithium Professional), they exhibit a higher voltage, compared to their alkaline competitors. The pack pictured produced 7.07V initially (1.76 per cell), which is significantly more than what's customary for alkalines (6.3-6.4, about 1.55-1.60 per cell). The heating phase reduced this to 6.72, still quite a bit more. The other significant difference is their bigger capacity. While the Varta Lithiums had some kind of a defect and didn't really shine, the Energizers easily passed the 3000 mAh "barrier" - clocking a bit more than 3100 mAh, with no coastdown charge left (the main discharge took 99% of the energy). All in all, these are the best tested AA-sized cells yet, even though the price makes them uncomparable to alkalines, but that seems to be the norm for this chemistry.

Test results

Coastdown:

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