Established in 1995, Chijiu Battery Co., Ltd. are a high-tech China energizer charger manufacturer and wholesaler engaged in the design, manufacturing and marketing of battery, charger, adapter and solar panels etc. Our custom energizer chargers are extensively used in telecommunications, electronics, solar energy systems, electric vehicles, UPS, security systems, emergency lighting, power tools, mobile phone, digital camera & camcorder, MP3, laptop, portable DVD, blue-tooth, PDA and intelligent charger solution. To keep the GB/T7112-1998, IEC60086-2 standards. We implement the certificate system ISO9002 since 1998. In 2001 we passed the audit of ISO9001:2000 quality management system and ISO14001:1996 environment management system conducted by the world-renowned Det Norske Veritas (DNV) and had the certificates issued.

Energizer 15-Minute Battery Charger
Ideal for use in high drain devices
DIGITAL CAMERAS, Portable Audio Devices, HAND-HELD GAMES
4 1850 NiMH Included
Product Dimensions: 4 x 9 x 4 inches ; 2 pounds
Sold at Sams with 8 AA and 4 AAA batterys. The clue about how this charger works is in the instruction sheet: "Note: If the unit is unplugged or power is interruped during the charging cycle, the time will start over and run the full charge cycle." and "The charger is designed to charge AA NiMH batteries (maximum capacity of 2500 mAh) and AAA NiMH batteries (maximum capacity of 850 mAh) For lower rated capacity batteries simply remove the batteries before the charge cycle is complete based on the following charge time." (table of approriate charge times is listed)
In other words this charger doesn't sense overcharge because it only has a timer. After 8.5 hours the charger turns off. Period, end of details.
You can't use this charger on alkalines or rechargeable alkalines, so don't even think about "refreshing" those in this charger.
One thing about the Refresh mode. Refreshing NiCads manually may take several cycles of charging and discharging. Not only does this charger perform the charge/discharge cycle as many as 20 times, it measures the capacity of each discharge cycle and stops refreshing when the capacity of each battery isn't improving anymore. With other chargers, you're probably overcharging some of the batteries just to get the others back up to snuff.

Energizer Overnight NiMH Battery Charger
CHDCWOB AA AAA Battery
Product Dimensions: 9 x 4 x 1.8 inches ; 2 pounds
For more than 100 years, Energizer - through continuous invention and innovation - has played a vital role in how people live, work and communicate. Energizer powers people's lives around the globe by offering consumers superior value in portable power and lighting products and creating and delivering superior consumer and customer solutions that elevate Energizer as the global portable power leader. Automatic switch off after 10 hours;Reverse polarity protection;Overcharging protection;Trickle charge after full charge;Charging status LED;Improved slimmer design.
One thing it doesn't have is an LCD readout (though their C-777 model does). The BC-900 has an individual LCD readout for each battery, which you can set to alternatively display any of 4 different measurements (hours, volts, mA charge/discharge, mAh), in addition to continuous displaying the particular mode each battery is in. The LCD readout retains it's reading (e.g. tested mAh) until the battery is pulled out, making overnight "tests" possible. The LCD makes all the other charger modes informative and practical.
Shame on those other chargers that have LCD indicator bars but no numerical display (some even cost more than the BC-900).
Understand, as great as all the different modes and options of this charger are, without an informative LCD display, they would be "shot's in the dark". With the individual displays, I'm happily recharging batteries, checking the quality of each, refreshing some while storing the "truly" fully charged ones.

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