Aman: in the 500ma case below, on the USB there is no handshake on the
data lines, the device has only 5 and ground, does that matter? it was
designed to use a 120v ac charger with 5 volts 500ma DC output. I am
wanting to extend life from 5 hours to about 15 with out recharge so
connecting to external battery. Will the Anker or any other such
battery need some sort of feed back? John
On 9/6/15 8:19 AM, Aman Singer wrote:
Hi,
The amperage of output noted on a USB five volt battery indicates the peak
output if the device requests it. These batteries can charge any usb powered
device using standard protocols, keep in mind that some devices use only a
hundred miliamps and others use three amps. The usb specification, even on
computers and wall chargers, needs to handle such differences between devices
gracefully.
Hth,
Aman
On Sep 5, 2015, at 11:11 PM, John Weir <johnw...@gvtc.com> wrote:
Need to understand them. Been looking at Anker batteries. Do they self
regulate their output? ie I have a device that charges off the plug in power
supply at 550ma. IF I use an external battery charger that can supply 1 or 2
amps , is this spec the possbile peak rate while the battery charger only
provides 555ma to my device then if I have an iphone needing 1 amp it provides
one amp? Ie I dont want to over heat and to blow up a iphone or other device
small battery that usually charges at 550ma by hitting it with 1 or 2 amps..
How do they work? John Weir
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