Capacity and self-discharge of batteries «LADDA 750» - detailed results

Data: Brand / model LADDA 750 Price 5.11 € Unit price 1.28 € Alternative packagings — Origin China Store Ikea Date of manufacture 10-2013 Condition (age) Tested items are brand new Low self-discharge (LSD) No Discharge (1-hour rest) 5.05 V 720 ±1% mAh (≅0.91 W·h)     Discharge (5-day rest) 5.02 V 665 ±1% mAh (≅0.83 W·h) ~8% self-discharge     Discharge (1-month rest) 4.98 V 645 ±1% mAh (≅0.80 W·h) ~11% self-discharge Date of measurement May 2014

Notes:

Like their AA counterparts, this pack is a budget brand with LSD technology from Ikea, marked as 750 mAh:

... which seems to be true according to the tests here. The factory charge came out a lowly 480 mAh. Then followed a normal forming with a decent inter-cell balance according to the MAHA. The 1-hour test was 720 mAh, falling to 665 mAh when the wait was increased to 5 days. In the latter test the pack was initially 5.35V. A month later, the pack has fallen to 5.23V, while the capacity was 645 mAh. An interesting observation, happened by accident: due to an error I had to do the 1-month test twice: the first one was with the wrong current (~170 mA), customary for AA, not AAA packs. It was expected that the capacity on that test were lower, but it did only slightly so, at just 5 mAh less!

Test results

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