- Brand Name: Sanyo
- Model Number: SEC-MDR02TG3U
- Battery Type: NiMh
- Item Package Quantity: 1
Sanyo Eneloop 2 Pack AA NiMH Pre-Charged Rechargeable Batteries w/ Charger (Discontinued by Manufacturer)
- Compact charging kit with pair of 2,000 mAh AA batteries for digital cameras, remotes, and more
- Pre-charged and ready to use right out of the pack; preserves charge for long periods of time
- Extremely slow self-discharge rate maintains 85 percent of capacity after 1 year of storage
- Over-voltage protection system; foldaway AC plug offers worldwide voltage for traveling
- Batteries can be charged up to 1,000 times (including partially) without experiencing memory effect
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Battery: AA / AAA - nickel metal hydride
Batteries Included: 2 pcs.
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From the Manufacturer
Sanyo eneloop batteries are an excellent choice for your rechargeables because:
- They can be used right after purchase
- They consistenly yield high performance
- They have a long shelf life with no loss of energy
- They can be used everywhere
- They are environmental friendly
Self-Discharge: Why Conventional Rechargeables Don't Cut It
Conventional rechargeable batteries have numerous advantages that make them great to use for your portable electronics. But they also come with certain disadvantages. After purchase, rechargeable batteries have to be charged before they can be used. And once charged, rechargeable batteries lose the stored energy rather fast. The charging takes quite long and rapid chargers are expensive. Not only that, but continuous charging or frequent charge to "top off" the lost energy (without complete discharge) can destroy the battery.
All these negative attributes have one root-cause: self discharge. Self-discharge means that a charged battery slowly discharges itself without any equipment consuming any current. This is the reason for rechargeable batteries being sold in a discharged state. And this is the reason that keeping charged batteries for some time did not make any sense. When you needed them, the energy was gone. Sanyo eneloop batteries have an extremely low rate of self-discharge, which means they hold their stored energy for a very long time--charge your batteries once and put them in your kitchen drawer, and over a year from now you'll still be able to use them right away, without needing to charge them again.
Under the Hood: How eneloop Controls Self-Discharge
How can the self-discharge in the eneloop be so reduced? The self-discharge of Ni-MH batteries is caused by three main reasons:
- The chemical decomposition of the cathode
- The natural disaggregation of the anode
- Impurities of the anode
This gives eneloop batteries a number of advantages over traditional alkaline batteries, including up to four times more power when used in a digital camera, high performance even at low temperatures (down to 23 degrees F) during your winter vacation, and a vast cost savings in the long run. The eneloop advantages are even more glaring when compared to typical NiMH batteries: not only are they ready for use right out of the box, but they generally last longer than most NiMH batteries (continuous and frequent recharging can destroy other NiMH models) and save both time and money (traditional NiMH charging is slow when you're in a hurry, while rapid chargers are expensive). All told, you can recharge eneloop batteries up to 1,000 times without experiencing a "memory effect"--just charge the amount you need and you're set.
Top Customer Reviews
The MDR02 works very well as a travel charger for my trips, too. It is tiny (measures only 3"x3"x1"), very light (weights about the same as two AA cells), and accepts universal input voltage of 100-240V AC. It is also a "smart" charger in the sense that it charges each cell individually, and stops whenever each cell is full.
The charging current of MDR02 is 550mA for AA, 380mA for AAA. That means it takes about four hours to charge up either 1 or 2 eneloop AA cells (2000mAh). This may seem slow, but it is actually a lot faster than the Sanyo 4-cell charger 'MQN06' included in Eneloop 4 Pack AA w/ Charger. The MQN06 charges at only 300mA, so it takes up to 7 hours for a pair of eneloop AA cells. It also forces you to charge in pairs, which is very inconvenient if your appliance requires odd number of cells.
If you need a faster, more advanced 4-cell charger for home use, I highly recommend either the La Crosse BC-9009 or BC-700. As a reminder: the eneloop cells do NOT require special chargers. Any good quality "smart" NiMH charger will do the job. The reverse is also true - You can use this eneloop charger for other brands of AA or AAA NiMH cells as well.
The main drawback of this charger is that it is rather slow. The charging current is 550mA for AA , and 380mA for AAA. That means it takes about four hours to charge up a pair of 2000mAh eneloop cells. What if you need to charge up a set of four 2700mAh cells? That will take close to 12 hours! So you really should keep another faster charger for home use. Just remember that the eneloop cells do NOT require special chargers. Any good quality "smart" NiMH charger will do the job.
The reverse is also true - You can use this eneloop charger to charge other brands' AA or AAA NiMH cells. I keep one in my office just to charge up batteries for my MP3 players, headphones, wireless mouse, etc. And since I always keep a spare set of fully charged batteries, the longer charge time does not bother me.
Hence comes the Eneloop. These batteries' voltage doesn't drop and they discharge very very slowly. I have used the Eneloop for over two months now and glad to say it finally solve the problem of my Canon A540. A set of freshly charged Eneloop can last for weeks and 300+ pictures and counting. Plus the charger is 110v to 220v capable, so my trip to Asia/Europe won't require a different charger. This is an awesome product and I will buy more of it!
My problem is with the D (and possibly C) spacers (adapters) that come with these batteries. I purchased these mainly for use in flashlights, and other regularly used items. To my dismay, the D spacers do not work in my Mag-Lite 3 cell (D) flashlights. I'm sure this is going to be an issue with other flashlights as well. A normal feature of flashlights, is the coil/spring that presses against the batteries and completes contact when the flashlight is closed. An important aspect to this is that the spring needs to be able to press against the actual batteries. Unfortunately, since the spacers are shorter than the AA batteries, and they're open at the top, the spring simply goes over and around (never touching) the end of the AA battery. It then pushes on just the plastic spacer, causing no connection, so the flashlight doesn't work. The only way to fix this, is to put a coin or metal disk on top of the AA battery, and then close the flashlight. Doing this makes the necessary connection and the flashlight works.
[...] Flashlights have been around for years, and so has the existence of these springs, so in my opinion this is really bad designing.
I hope Sanyo corrects this with future adapters, since these can really be useful batteries. I shouldn't have to amateurishly rig a flashlight to get it to work. They should have realized that the bottom of a D battery has a larger surface area, and many products are designed with this in mind. Since they didn't take that into account, the small surface area of the AA battery, is a pretty big issue.Read more ›
Most Recent Customer Reviews
I've purchased this in 2009. It is now 2016. The battery still works like brand new. Best 12 bucks I've ever spent in my life. I only remember charging it once a year really. Read morePublished 25 days ago by Jeff
I've been using these batteries for years, and they have stood the test of time. They're the BEST batteries of the world, as simple as that.Published 4 months ago by Jimmy Cash
Sanyo Eneloop are my go-to batteries. I have been using and recharging these guys for years and they have never failed me. Read morePublished 4 months ago by Jen
The USB charger is so handy. I use this at work for Bluetooth mice, trackpads, keyboards etc.Published 14 months ago by Shawn T. Rutledge
My Eneloop batteries will sit months at a time without use, but always perk right up and do the job. They do not seem to have lost their ability to hold a charge.Published 22 months ago by Retired Viking