Capacity and self-discharge of batteries «Tronic EnergyEco 2300» - detailed results

Data: Brand / model Tronic EnergyEco 2300 Price 3.57 € Unit price 0.89 € Alternative packagings — Origin China Store Lidl Date of manufacture 07-2013 Condition (age) Tested items are brand new Low self-discharge (LSD) Yes Discharge (1-hour rest) 5.02 V 2100 ±1% mAh (≅2.63 W·h)     Discharge (5-day rest) 5.00 V 1980 ±1% mAh (≅2.49 W·h) ~5% self-discharge     Discharge (1-month rest) 4.97 V 1840 ±1% mAh (≅2.28 W·h) ~12% self-discharge Date of measurement Nov 2013

Notes:

I bought these for myself knowing the good results the previously tested had. There are a few differences now: the price is half an euro less, the packaging has them at 2300 instead of 2100 mAh, and the results are noticeably better, clocking around 350 mAh more on average. A year later I tested yet another pack, which, this time, was virtually identical visually and electrically.

Some details: the cells were around 4 month old when I tested them. The factory charge was reading at 5.08V, with a good balance between the cells, and held ~1680 mAh. This was followed by a normal forming, in which the cells showed a fair balance, around 70 mAh difference (we've seen better). Later the cells had two discharges at 1-hour wait (2120, 2100 mAh) as well as one 5-day (1980). A month later, the cells' voltage was 5.21 (dropping to 5.20 after heating) and held just a bit more than 1840 mAh, which means 12% self-discharge per month, which surprisingly high for a LSD-labelled AAs.

Test results

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