Black Rose
Flashlight Enthusiast
what are the risks?
I have a nice collection of Eneloops (44 AA, 12 AAA), some that are in actively used lights and radios, and I have 16 AAs that are designated as backup cells.
I figured that since the backup cells hadn't been used in approx. 6 months I'd discharge them (500 mA) and then perform a Refresh & Analyze on them with my C9000 (1000 mA charge/500 mA discharge).
Well this morning the second set of 4 completed the cycle, and I have two more Eneloops that are reporting in below the 1900 mAh nominal rating.
The latest two affected cells came in at 1884 and 1888 mAh. The previous one came in at 1870 mAh.
These cells came in at between 1951 and 1971 mAh when I performed the break-in on them when new.
I general I have noticed with the C9000 that the difference between the reported break-in capacities and regular charge capacities is about 90 - 100 mAh.
A good example from my own reporting is here.
The Eneloops are advertised as being able to hold 85% of their charge after 1 year, but what is the risk to the cells of leaving them sit around unused for 6+ months?
Also, is the 1900 mAh nominal capacity based on the IEC standard charge or a regular charge?
I have a nice collection of Eneloops (44 AA, 12 AAA), some that are in actively used lights and radios, and I have 16 AAs that are designated as backup cells.
I figured that since the backup cells hadn't been used in approx. 6 months I'd discharge them (500 mA) and then perform a Refresh & Analyze on them with my C9000 (1000 mA charge/500 mA discharge).
Well this morning the second set of 4 completed the cycle, and I have two more Eneloops that are reporting in below the 1900 mAh nominal rating.
The latest two affected cells came in at 1884 and 1888 mAh. The previous one came in at 1870 mAh.
These cells came in at between 1951 and 1971 mAh when I performed the break-in on them when new.
I general I have noticed with the C9000 that the difference between the reported break-in capacities and regular charge capacities is about 90 - 100 mAh.
A good example from my own reporting is here.
The Eneloops are advertised as being able to hold 85% of their charge after 1 year, but what is the risk to the cells of leaving them sit around unused for 6+ months?
Also, is the 1900 mAh nominal capacity based on the IEC standard charge or a regular charge?