Has anyone tried one of these power supplies?? I'm overseas now and can't get one shipped..
It is charged from 5V / USB and puts out 5V at up to 800ma.
"Usually" ! $35 Sale $6.60
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Specifications:
Input: 5VDC 500mA
Output: 5VDC 800mA Max.
Push capacity button with green LED indicator for battery condition
-1st LED = 35% of full capacity
-2nd LED = 60% of full capacity
-3rd LED= 100% of full capacity
Built-in Battery: Li-Ion 3.7V 1800mAh
Operate temperature: 0'C - 45'C
Pack's dimension (LxWxH): 86mm(3.4") x 51mm(2.0") x 15mm(0.6")
Pack's weight:2.5 Oz (71 grams)
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At the price, ease of use, (?maybe right connector?), seems interesting.
haven't used one but did spot the deliberate mistake in the spec sheet. You cannot get 800mA at 5 volts out of a USB port that is inputting 5 volts at only 500mA.
jackrae:
haven't used one but did spot the deliberate mistake in the spec sheet. You cannot get 800mA at 5 volts out of a USB port that is inputting 5 volts at only 500mA.
Jack - ex Safaniya (1978-85)
Certainly you can. This is most likely a single cell li-po battery (nominal 3.7vdc) using a step-up switching regulator to output the +5vdc. The fact that it charges with a 5vdc input through a charging circuit as no relationship of what the output voltage may be. Note that the documentations says you can't charge and power a load at the same time.
What key specification is missing is the mAH rating so there is no way to calculate how long the pack can power a given load.