Samsung keeps teasing features on the Galaxy S6 flagship ahead of its March 1 unveiling in Barcelona. Now, it's hinting at something that has tantalized everyone since the advent of the smartphone: wireless charging.

The Korean manufacturer took to Twitter Tuesday with a video that some see as another big hint at wireless charging, namely because of the "S" rendered as a lightning bolt. “The faster I am, the more that gets done. And the more time I can give to others,” says an unseen narrator as the shot moves from an apartment window to a bustling city view. The 21-second clip ends with the tag line "I am #TheNextGalaxy" next to a lightning blot shaped icon.

Samsung has given other hints that the Galaxy S6 could include wireless charging. A recent post on the manufacturer’s Samsung Tomorrow blog discusses wireless smartphone charging as an industry standard. The post, from Samsung principal engineer Seho Park,  delves into the increasing popularity of wireless charging, not only in smartphones but across many devices and appliances and also indicates that Samsung will put more focus on wireless charging on its devices in 2015.

“Samsung will accelerate to democratize this wireless charging technology with compelling smartphones. With our upcoming Galaxy smartphones, users will be able to enter a new wireless world like never before,” Park wrote.

It is not known whether Samsung has updated its wireless charging technology, which typically includes a special charging case for smartphones and a wireless pad on which to place a device for charging. A leaked list of Samsung Galaxy S6 accessories did not include a wireless charging case, tech website SamMobile reported in January, though device details often change abruptly as their launch date approaches.

The speed reference in the teaser also could suggest in processing speed. Samsung recently announced its Exynos 7420 chip, which is expected to be featured on the Galaxy S6. The manufacturer claims that the chip is 30 percent to 35 percent more power-efficient than other chips now standard on the market, while several leaked benchmarks indicate that the Galaxy S6 clocks processing speeds that greatly exceed those of devices currently on the market.

Recent reports also suggest the Galaxy S6 could feature a battery with a lower power capacity than the Galaxy S5 -- 2,600 mAh compared with the 2,800 mAh battery in the Galaxy S5. The smartphone could feature a nonremovable battery, an unusual move for Samsung. But the power-efficient Exynos 7420 chip could help compensate for the loss of power.

Prior to that, Samsung sent out Friday a video that likely shows off the Galaxy S6 camera.