Designed for Sony camcorders and cameras which accept Sony's "M" series batteries, this powerful InfoLithium battery provides up to 145 minutes of recording time. However, operating time will vary depending on the device, usage, and temperature.
Part of Sony's AccuPower system, InfoLithium batteries include a built-in microprocessor that communicates with compatible Sony camcorders. The AccuPower Battery Meter — a highly sophisticated power management feature that constantly monitors shooting conditions — displays the minutes of remaining battery time in the corner of your viewfinder or color LCD screen. The NP-QM71D is also equipped with 4 LEDs on the battery itself, which indicate the remaining charge. It takes the guesswork out of figuring out when to change batteries!
InfoLithium batteries don't suffer from the "memory effect" of NiCad batteries, so you can partially charge them without reducing their capacity. And the NP-QM71D charges in just 54 minutes when used with a compatible Sony Super Quick charger like the AC-SQ950D.