This package (Sanyo XX Battery Powered by eneloop, 2500mAh High Capacity, 4 Pack AA Ni-MH Pre-Charged With MQRO6 quick charger
) is a great combo - for people who really need that extra power.
The SANYO eneloop XX
cell is currently the highest capacity LSD (low-self-discharge, or "Pre-Charge") AA battery. Sanyo rated the capacity as "2500mAh typ., 2400mAh min.". The measured average capacity, using my La Crosse BC-900 battery charger/analyzer
, is even better at 2607mAh, or 4% higher than spec.
Just for comparison, here are some of my test results for other LSD cells:
- SANYO New (1500-cycle) eneloop AA
: Rated 2000mAh, tested ~2100mAh (5% higher).
- GP Recyko NiMH AA
: Rated 2100mAh, tested ~2230mAh (6% higher).
- IMEDION AA
: Rated 2400mAh, tested ~2450mAh (2% higher).
- Yuasa Enitime PLUS AA
: Rated 2500mAh, tested ~2400mAh (4% LOWER)
The self-discharge rate of Sanyo XX cell is slightly higher than that of Sanyo eneloop. According to my test, the XX retained ~78% of measured capacity after five months of storage, whereas eneloop can typically retain ~88%. For all practical purposes, the charge-retention rate of XX is good enough.
The charger in this package is the new MQR06, which is not to be confused with the old MQN06 sold with most eneloop packages. Just to help you remember: R=Rapid and N=Normal/slow.
- The old MQN06 is very slow and it charges in pairs (2 or 4 cells) only.
- The new MQR06 charges much faster, handles odd number of cells, and has individual status lights.
The charging current of MQR06 depends on the number of cells being charged:
- For 3-4 AA cells, the charging current is 560mA. So it takes about 5 hours to fully recharge a set of 2500mAh Sanyo XX cells
- For 2 cells, the charging current doubles to 1120mA, then it only take 2.5 hours to recharge a pair of Sanyo XX cells.
- For 1 cell, the charging current increases to 1680mA. By the way, it is actually not a good idea to charge at such a fast rate.
In contrast, the old MQN06 charges 2 or 4 cells at 300mA, so it takes about 9 hours to recharge those Sanyo XX cells.
The only drawback of this package is higher price. As of this writing, you can get the Sony Cycle Energy BCG34HRE4KN Quick with Refresh Charger and 4 Pre-Charged 2000 mAh AA Batteries
plus an extra set of eneloop cells for the same cost. The Sony charge is very similar to the MQR06 in terms of charging current, but it added a REFRESH function.
Bottom line: If you really need the extra 25% capacity of Sanyo XX for mission-critical application, then this Sanyo package is your best choice. Otherwise, consider getting the Sony package with an extra set of eneloop cells instead.