"M" series * LED indicators for remaining charge * rated at 7.2V, 19.9Wh, 2760mAh * 1-9/16"W x 1-1/2"H x 2-3/16"D * weight: 5.6 oz. * warranty: 90 days
1 Extremely long life, a definite must for your Sony camcorder
When fully-charged, I generally get 380 minutes out of the battery, or just under 6 1/2 hours, and that is with the LCD screen open and recording continuously. With the AVC-Q50 AC adapter and power charger, this battery can be fully charged in less than two hours. With this battery in my bag, I never have to worry about running out of power on the fly. I keep the original battery that was included with my camera in my bag as emergency backup, but I have not used it yet. In fact, generally, this long-life battery will last through 2 or 3 shooting sessions before needing to be recharged. For some, this battery may seem expensive and cost-prohibitive, but it has also made the $50 cigarette lighter adapter/charger unneccesary. If you can, pick this up, and avoid that horrible moment of watching your camera battery die at the worst possible moment.
2 A must
I have a Sony DCR-TRV33, it has a very short battery life with the one included.
This battery is a must. Don't think that would be an event that would need more that what this battery gives.
I would be good if Sony offers a battery/charger combo that is a little cheaper.
3 Lithium Camcorder Battery
I can't say enought about Sony, if it has the name Sony on it its great. The battery holds up very very well, I've had one for a very long time and wouldn't change to any other name.
4 Essential; Optimal Sony Camcorder Battery
An additional large capacity battery is an essential purchase to replace the inadequate batteries supplied with most mini-DV camcorders. This battery is the best of the bunch, providing great battery life without being too bulky or pricey. Sony's other batteries are either too large (e.g. the QM91D) or don't last long enough to be worth the additional expense (e.g. the FM30 or FM50).
Moreover, if you are willing to pay an additional $150 for the Sony AC-SQ950 Quick Charger, this battery can be charged in under an hour! Highly recommended.
Notes: (1) Don't confuse this with the older QM71. The "D" is important (no on-battery power indication or Quick Charge without it). (2) Be sure your device takes an "M Series" battery. Sony has several lettered infoLithium battery "series" (e.g., the super small "C Series" for compact digital cameras) that all tend to look alike in unscaled online product photos, but batteries from different series are NOT interchangeable.
5 Should have been standard
I purchased this as an accessorry for my Sony DCR-TRV38 camcorder. It's got a long life and a neat battery check function on it. However, it is on the bulky side and extends the overall length of the camcorder when attached. One nice thing is that the viewfinder on the camcorder extends to accommodate the longer length. Sony really should have made this standard, as the included battery is woefully inadequate. It may be of interest to note that I needed to purchase a separate charger ($100) to take advantage of the quick charge function.
