Features:

• Charges four AA and AAA batteries at a time SIX
• Unviersal voltage from 100-240V
• Alkaline battery detection, temperature and voltage safety controls
• Includes four 2500mAh NiMH batteries

Editor Reviews:

Product Description:
Sony's worldwide reputation for creating unique, attractive, high-quality, advanced technology products rests on a long line of innovations embraced by people from all walks of life. With a diverse product lineup serving a variety of lifestyles and industries, Sony continuously strives to introduce new products and technologies to meet changing market needs.

Amazon.com Product Description:
Whether you're traveling abroad or making a domestic jaunt, Sony's BCG-34HE4 charger and battery combo is everything you'll need to keep your high-demand digital electronics juiced up and ready for action. The compact, lightweight charger handles 4 AA and 4 AAA batteries simultaneously and just happens to come with 4 high-capacity (2500 mAh) rechargeable AA Ni-MH batteries.

The charger works with worldwide voltages: AC outlets ranging from 100 to 240 volts (50/60 Hz). For your safety and convenience, the charger offers alkaline battery detection (in case you accidentally load non-rechargeables) and automatic cut-off for excessive temperature and/or voltage.

What's in the Box
A charger, 4 AA rechargeable batteries, and a data sheet in a blister pack.

Rating : - These leave Alkis in the DUST!
I do a lot of instrumental music recording and performing, and I use these Sony rechargeables EXCLUSIVELY in my gear, the most power-hungry of which are my Zoom H2 Handy Portable Stereo Recorder and my GigLight Compact LED Music Stand Light. I also use them in my Canon PowerShot A720IS 8MP Digital Camera with 6x Optical Image Stabilized Zoom when going "optical" rather than "audible."

I can EASILY record two hours of music on my H2 with two of these batteries at 44.1kHz, 16-bit. I have never even come close to their running out early, and I've never had the device quit because of a lack of power. And I have recharged these MANY times for MANY gigs.

Loading my GigLight with these, I have found I can run it OVERNIGHT -- even 24 hours! -- and not drain them completely.

Plus, the batteries last between 200-400 pictures in my Canon, depending on whether I'm using a lot of flash and whether or not I leave the AF on "continuous." I'm never short of power. It's amazing.

Charge time is very reasonable, and this handy carry-case (while the key ring is a bit ambitious) keeps my batteries together when I use the H2, which uses only 2, but keeps a spare pair at the ready if I need them.

These leave Alkis in the dust! HIGHLY recommended -- and that's high praise because I'm generally NOT a Sony fan. But I am a fan of these!