content: Rated at 1000mAh, just like the original Panasonic battery for my TZ5. Only had 1/2 the life at first. A little over a year later, it only lasted for 4-8 picture and 3-5 minutes' worth of video. After a year and a half, this battery is dead. Not even recommended as a backup. Spend the extra few dollars and get one with a better user rating, more mAh, or better yet, just get the Panasonic.*Update: I returned it under their 3 year warranty (though they now say it's only 2). I had to pay $2 to ship it back to them (which is fine), and now they say I owe them another $7.50 for shipping and handling. Wow, this battery only costs $7.14 new right now.**Update #2: I ignored their request for another $7.50, but after a month or so, they sent me a new one anyway (which has been sitting in my desk ever since, since I bought a higher quality backup battery in the meantime...the Kinamax 1300mAh S007 for about 15 bucks).