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...
Forum Discussion
road-runner wrote:red31 wrote:This is true, but the only labeled output voltages are 12 and 120, so where does 5 come from? On the Amazon page for this device, there are 3 other "similar items" shown where the watts/Ah works out to 3.7 volts. So is this energy spec in Ah based on the voltage of the internal battery which isn't stated?
42ah X 5v = 210wh
page 11 of customer questions is this
"Question: How many amp hours does the power bank have?
Answer: hello, 36AH3.7V or 12AH11.1V or 133WH
HKSY Seller ยท October 31, 2018"
????? a different model ?????
I used 5v since the USBs are 5v!
Powkey website shows 146wh
http://www.ledpowkey.com/content/?235.html
so yes ah is useless without a voltage! like 3.7v
