The Canon entry-level camcorders have great battery life, and you can buy external battery packs to add even more juice.
Sanyo and Samsung both make camcorders that have the longest battery life.
The original brand of battery that the camcorder came with will be the longest lasting.
Sony's L Series Infolithium battery lasts much longer then the competition.
Most camcorder batteries are capable of 2-6 hours of power.
Battery power is highly important to achieve excellent quality on your camcorder. To prolong battery life, plug the camcorder in the night before using it, as batteries can lose charge if they have been stored away. Using the viewfinder, instead of the LCD screen, can also save up to twice as much power. Using features, such as watch movie now, on your camcorder can use up the battery in a short amount of time. Follow these tips to prolong battery life.
An expandable battery is if you would like to switch out the existing battery with a longer-lasting one. It will extend battery life.
The Canon BP-2L14 has a three hour battery life.
The average battery life is about 80 minutes. For more information, and a detailed review on a specific model, take a look: http://reviews.cnet.com/digital-camcorders/sony-dcr-dvd650/4505-6500_7-33485113.html#reviewPage1
General internet opinion of the battery life regarding the Sony Mini DV Camcorder says the battery life is decent. The battery is a InfoLITHIUM, with AccuPower Meter System so that the charge remaining can always be seen. On average, and great temperature conditions (between 32�-95� Fahrenheit) the battery on this camcorder seems to last around 120 minutes, whereas other Sony Camcorders appear to last around 3 hours, on average. http://www.amazon.com/Sony-DCR-HC52-Handycam-Camcorder-Optical/dp/B00123Q8VY or http://www.abesofmaine.com/abeimg/powerreviews/pwr/product-reviews/Video/Camcorders/Sony/p/SNHDRHC9-HDR-HC9-MiniDV-HD-Camcorder.html
It depends on how you use and maintain it.
The Samsung Galaxy Note II (T-Mobile) has the longest battery life for a smartphone. The website Lap Top Mag offers a look at the top 10 smartphones known to have the longest battery life.
It can be a real pain when you're filming something great and your camcorder decides that it's just going to die on you. Most camcorder batteries tend to lose their ability to charge after a certain amount of use, which forces you to buy new batteries sooner or later. However, there are a few things that you can do to ensure a longer battery life without buying new ones. For example, there are a lot of unnecessary systems that run by default on a camcorder. Going through your menu to disable these unnecessary systems will significantly increase your battery life.