Just seeing if anyone has done any self discharge tests on Eneloop Pros or the newer Ikea Ladda Whites.
I bought some of the new Ikea Ladda White 2450mAh AAs when they were made available in Australia in 2016.
I also have used a 4 set of Eneloop Pros in the past but I've mislaid them in some equipment and can't find them atm.
In terms of stated capacity, I have no problems with the Ikea Ladda Whites. They have all charged up to at least 2400mAh (up to 2550mAh on my Maha C9000, on my Lacrosse BC700 at 500mA charge, the come up a bit higher at 2600mAh).
I use the Ikea Ladda Whites in my hiking Garmin GPS that I take for multiday hikes, and I've been happy with their performance. They perform like my lost Eneloop Pro set. I get more hours of battery life out of each pair of AAs than I previously did with standard 2000 mAh Eneloops or the Energiser 2300mAhs that I used to use regularly with that GPS.
Self Discharge Testing
The batteries from my packs were stamped with "1637" (The date format is different from Eneloops, but I guessed the first two digits were the year, and the second two is the weeks of the year - which made these September 2016, and I picked them up at the end of that month).
I set one pack of 4 AAs aside - discharged and charged them four times, and then left them for 6 months.
First Self Discharge Test After 6 months (March 2017) they showed:
Not sure what happened with the last one, but the other three show around 66% of their original capacities.
This is quite a bit more self discharge compared with Eneloop Pros which are meant to be 85% within 1 year.
I meant to leave them for 12 months to see what the self discharge would be, but messed up when they went into the charger about 8 months in and I forgot to record the results.
So I ran the same 6 month self discharge test again on that batch - I also ran through four discharge/charge sessions before fully charging and storing them for 6 months.
Second Self Discharge Test (June 2018)
Again that last one seems to be the worst of the batch - discharging higher than the other three, but the others are between 66-70% of their capacity after 6 months. This is still a greater self discharge than with the stated Eneloop Pros which is meant to be at 85% in 12 months.
So - has anyone done any self discharge tests on the Eneloop Pros? So that I can compare them with my Ikea Ladda whites?
Or have I done something wrong on my batches for testing?
I have two sets of 4 AAs for testing, and I've written identifiers on them so I don't mix them up (eg, 1-1, 1-2 etc for set number and cell number). I have charged them up again, and will leave them for 6 months and 12 months.
I bought some of the new Ikea Ladda White 2450mAh AAs when they were made available in Australia in 2016.
I also have used a 4 set of Eneloop Pros in the past but I've mislaid them in some equipment and can't find them atm.
In terms of stated capacity, I have no problems with the Ikea Ladda Whites. They have all charged up to at least 2400mAh (up to 2550mAh on my Maha C9000, on my Lacrosse BC700 at 500mA charge, the come up a bit higher at 2600mAh).
I use the Ikea Ladda Whites in my hiking Garmin GPS that I take for multiday hikes, and I've been happy with their performance. They perform like my lost Eneloop Pro set. I get more hours of battery life out of each pair of AAs than I previously did with standard 2000 mAh Eneloops or the Energiser 2300mAhs that I used to use regularly with that GPS.
Self Discharge Testing
The batteries from my packs were stamped with "1637" (The date format is different from Eneloops, but I guessed the first two digits were the year, and the second two is the weeks of the year - which made these September 2016, and I picked them up at the end of that month).
I set one pack of 4 AAs aside - discharged and charged them four times, and then left them for 6 months.
First Self Discharge Test After 6 months (March 2017) they showed:
- 1687
- 1624
- 1665
- 1117
Not sure what happened with the last one, but the other three show around 66% of their original capacities.
This is quite a bit more self discharge compared with Eneloop Pros which are meant to be 85% within 1 year.
I meant to leave them for 12 months to see what the self discharge would be, but messed up when they went into the charger about 8 months in and I forgot to record the results.
So I ran the same 6 month self discharge test again on that batch - I also ran through four discharge/charge sessions before fully charging and storing them for 6 months.
Second Self Discharge Test (June 2018)
- 1733
- 1767
- 1619
- 1286
Again that last one seems to be the worst of the batch - discharging higher than the other three, but the others are between 66-70% of their capacity after 6 months. This is still a greater self discharge than with the stated Eneloop Pros which is meant to be at 85% in 12 months.
So - has anyone done any self discharge tests on the Eneloop Pros? So that I can compare them with my Ikea Ladda whites?
Or have I done something wrong on my batches for testing?
I have two sets of 4 AAs for testing, and I've written identifiers on them so I don't mix them up (eg, 1-1, 1-2 etc for set number and cell number). I have charged them up again, and will leave them for 6 months and 12 months.