| Regulated RCR-V3 batteries
There is a vast difference in the various options of rechargeable RCR-V3 batteries. Most are simply not safe in most (not all) digital cameras which use AA cells. The more expensive ones contain an integrated circuit, which among other functions, provides a low drop out voltage regulator (set at 3V). This allows the battery to supply 3V to the load until the actual battery voltage drops to about 3.05V. This is the only safe RCR-V3 to use. However, the cost of the RCR-V3 is significantly higher than 4 NiMH 2500 to 2900mAH batteries, so I would say that it is not an option to most.
Other options include the CR-V3 batteries which one can get over 2000 shots per set, and at under $9 USD a set (check for sales - that was the price at Wal-Greens a month ago, it would be hard to beat for an international trip or for backpacking.
Eneloops and Lithium Ion non-rechargeable AA cells work too, but for the average user, I would recommend 3 sets of NiMH AA cells (2500mAH or higher - should be under $10 a set of 4) and a Maha charger (several models out there). Keep a set of CR-V3s as a back up for those times when you don't get a chance to recharge the AA's.
Like other have said, never mix battery types. It can lead to premature end of life for rechargeables and can result in faster discharge for Alkalines.
Wayne (who spent over 20 years in the power conversion controller/power supply industry as a Technology Manager/Design Engineering Manager). |