thanar What the hell is a "5AA" battery?

thanar AnyA/C up to 2000W should work with this inverter with no issues. If the A/C is ALSO equipped with an INVERTER itself, then it would probably work up to 4-5000W. A fridge should probably be limited to under 2000W.

thanar Itwould be better if you mentioned the A/C power in WATTS and not HP, it's not a tractor.

thanar This headlamp needs two (I suspect it can work with just one though) rechargeable lithium 18650 cells. Nothing to do with AA or AAA cells. There is just ONE 18650 form factor. There are Li-Ion and LiFePO (that's a rare chemistry for this form factor though) 18650 cells. There are also protected and unprotected Li-Ion 18650 cells. I suspect that this headlamp will probably sport a protection circuit that would turn off the lamp if the batteries get too low, but I cannot be sure, until I make a proper review as soon as I receive the product. All 18650 cells are rated at 3.7V nominal and have various current and capacity ratings. This head lamp should however work with any Li-Ion 18650 cell.

thanar Once you set it up through the web interface, it should work with any WiFi-capable device. As a 3G USB modem however, it probably will not work under MacOS.

thanar Once you set it up through the web interface, it should work with any WiFi-capable device. As a 3G USB modem however, it probably will not work under MacOS.

thanar Yes you can, as long as the battery full-charge voltage is over 24V.