If you want continuous measurement, battery is pretty much not an option, PM2.5 will use a small fan, so even at 30mA it's 30 * 24 * 365 so for a year you need 262,800mAh battery, it's a different voltage but to put it in context your laptop is likely under 10,000mAh. If you only need to take measurements say every 30mins then sure, but then either you worry about sending it somewhere and receiving it or you need to use additional battery power for displaying it.