Lithium Pure Sine Wave Power Device AMAZON

Powkey 200Watt Portable Power Bank with AC Outlet for Camping 42000mAh Power Supply for CPAP ,2 AC Ports, 4 USB Ports, 2 DC Port
by powkey
4.3 out of 5 stars 57 customer reviews


Price: $145.89 Prime FREE Delivery

rechargeable 42,000 mah lithium battery
worth a look