No, As USB to Serial 9-Pin Male Adaptor is 12v Level, it is not compatible with Seeeduino film 3.3v Level.
If you have any 3.3V Level USB to Serial device, you can connect as:
Serial device <–>Seeeduino Film
But we recommend you use our UartSB to program Seeeduino Film.
Here it is:http://www.seeedstudio.com/depot/uartsbee-v31-p-688.html?cPath=104_109&zenid=73b93259611922f62e598cdfa4cceb39
Please select the Arduino Pro or Pro Mini (3.3V, 8 MHz) w/ ATmega168 board.
Seeeduino Film has a max1555 li-ion charger.
plug li-ion battery to BAT connector, and plug 5v power to CHG connector, MAX1555 will charge the li-ion battery as well.
And the battery we send with Film can keep Film work more than 24 hours in power save mode.
All the best