Follow the second link, scroll down to product description about half
way through the page, and check the Duo-Charge Section:
Product description
Offer Type:19200mAH
TeckNet PowerTitan T2 19200mAH External Battery:
Save time when charging!
.
.
.
Duo-Charge:
The Duo-Charge function enables charging of the PowerTitan while it
recharges a connected device such as an iPhone or iPad.
.......
Besides the battery capacity, there does not seem to be functional
difference between the chargers. Either of them should keep mostly idle
RPi running for at close to a day. I have 6500mAh USB charger running
RPi + PWM hat + WiFi dongle + a few sensors on a robot cart for about 8
-9-hours straight. The Pi lasts much longer than the other battery pack
feeding the motors.
I should have mentioned it in my original post, I thought that it is
obvious:
If your RPi consumes close to or more than the charging current max 2A
(depending on your actual power supply) - about 10% to power the
charger = ~1800mA --> your battery pack will not recharge after the
outage. In such case you would have to come up with different UPS
solution.
Best luck, Tomas
On Sun, 2017-04-09 at 19:23 -0700, Chuck Hast wrote:
> Tomas,
> The second selection looks more like what I am looking for but the
> first one
> will certainly work. But I do not see mention of pass through
> charging or
> charge while charging.
>
> Went ahead and bought the first selection.
>
> On Sun, Apr 9, 2017 at 6:46 AM, Nat Taylor <biob...@gmail.com> wrote:
>
> > I use something like that second battery to power my pi, it's just
> > a cell
> > phone charger, I'm not sure what running it while plugged in does
> > to it's
> > life. One could put it on a timer so the power cuts, it drains
> > the
> > battery for a while, then charges back up if that was advantageous
> > for
> > battery life...
> >
> > On Sun, Apr 9, 2017 at 2:39 AM Tom <tomas.kuchta.li...@gmail.com>
> > wrote:
> >
> > > There are probably other USB power banks which can be charged and
> > > discharged together. Here are two examples:
> > > https://www.amazon.com/TeckNet-Universal-16750mAh-Output-PowerZen
> > > /dp/B0
> > > 0FAU7ZB2/ref=pd_cp_107_1?_encoding=UTF8&pd_rd_i=B00FAU7ZB2&pd_rd_
> > > r=0JMM
> > > HXMXK7RYWY9K361K&pd_rd_w=712hM&pd_rd_wg=6mOCV&psc=1&refRID=0JMMHX
> > > MXK7RY
> > > WY9K361K
> > > <https://www.amazon.com/TeckNet-Universal-16750mAh-
> > Output-PowerZen/dp/B00FAU7ZB2/ref=pd_cp_107_1?_encoding=
> > UTF8&pd_rd_i=B00FAU7ZB2&pd_rd_r=0JMMHXMXK7RYWY9K361K&pd_rd_
> > w=712hM&pd_rd_wg=6mOCV&psc=1&refRID=0JMMHXMXK7RYWY9K361K>
> > > https://www.amazon.com/PowerTitan-19200mAh3-Port-Portable-Externa
> > > l-Tech
> > > nology/dp/B01B534D4Y/ref=sr_1_1?s=wireless&srs=5713662011&ie=UTF8
> > > &qid=1
> > > 491729627&sr=1-1
> > > <https://www.amazon.com/PowerTitan-19200mAh3-Port-
> > Portable-External-Technology/dp/B01B534D4Y/ref=sr_1_1?s=
> > wireless&srs=5713662011&ie=UTF8&qid=1491729627&sr=1-1>
> > > Based on recommendation from this guy:
> > > http://raspi-ups.appspot.com/en/index.jsp He used older model
> > > which is
> > > no longer available.
> > > I wonder how smart is the circuit in avoiding the
> > > charge/discharge
> > > battery cycles when the power is on - it relates to the battery
> > > life.
> > > Tomas
> > > On Sat, 2017-04-08 at 18:57 -0700, Chuck Hast wrote:
> > > > On Sat, Apr 8, 2017 at 3:42 PM, Tom <
> > > > tomas.kuchta.li...@gmail.com>
> > > > wrote:
> > > >
> > > > > dd nor rsync alone will not be able to do full backup of
> > > > > running
> > > > > computer (RPi).
> > > > >
> > > >
> > > > That was what I figured, just wanted to make sure.
> > > >
> > > >
> > > > > The best course of action is to separate the OS from your
> > > > > data -
> > > > > whatever your RPi is normally writing - then backup each
> > > > > separately.
> > > > > * When you separate the data, you could even store it off
> > > > > the RPi
> > > > > avoiding need for local data backups on RPi altogether.
> > > > >
> > > >
> > > > The drive has two partitions on it /boot and /. /boot is a
> > > > vfat, the
> > > > rest
> > > > of
> > > > it is ext4. I supposed that I could stop the service (weather
> > > > data
> > > > capture)
> > > > back up the files that are critical to the weather
> > > > station.After the
> > > > back up
> > > > is done start the service again. Maybe store them on a jump
> > > > drive and
> > > > after the station service is back up and running ship them off
> > > > to the
> > > > location
> > > > I will keep the back ups in. I figure that I could do the back
> > > > up in
> > > > the wee
> > > > hours of the morning.
> > > >
> > > >
> > > > > * If you want to keep the data on RPi, you could back it up
> > > > > by
> > > > > rsync
> > > > > to separate media (USB) or a network storage
> > > > > * You cannot back up the OS while you are using it - that
> > > > > is why
> > > > > this
> > > > > is normally done on a separate computer. It is easier and
> > > > > faster
> > > > > than
> > > > > booting your RPi from USB or network and then doing the
> > > > > backup.
> > > > > * Perhaps the OS does not need to be backed up often or not
> > > > > at
> > > > > all as
> > > > > you could simply create separate OS image, even on another SD
> > > > > card
> > > > > attached to your Pi.
> > > > >
> > > >
> > > > All I really need for recovery is the WeeWx db file, WeeWx
> > > > config
> > > > file,
> > > > skins
> > > > file and the nginx configuration. I could actually keep a
> > > > separate
> > > > image and
> > > > just insert the latest files and quickly swap out the bad SD
> > > > card.
> > > > That
> > > > should
> > > > take care of it.
> > > >
> > > > I should be able to automate the OS configuration, so that I
> > > > just run
> > > > a
> > > > script
> > > > it looks for the SD card, installs the OS makes sure that the
> > > > parameters
> > > > that
> > > > I set manually on installation are set correctly, probably can
> > > > automate the
> > > > whole process.
> > > >
> > > > * Your backup target/media could be another SD card connected
> > > > to
> > > > RPi
> > > > > in a SD card reader, that way you could just swap the cards
> > > > > ....
> > > > > Thinking outside of a box - perhaps you need little UPS for
> > > > > your Pi
> > > > > to
> > > > > avoid regular data corruption altogether. There are some USB
> > > > > charging
> > > > > batteries which can be charged and used both at the same time
> > > > > (most
> > > > > can
> > > > > be either charged or used, not both). Modest battery could
> > > > > keep
> > > > > your
> > > > > Pi running for hours.
> > > > >
> > > >
> > > > I have been looking for a battery pack that will allow me to
> > > > let it
> > > > float
> > > > on the
> > > > powersupply until power goes away, then it takes over. So far
> > > > all of
> > > > them
> > > > that
> > > > I have looked at will not switch between
> > > > charge/float/discharge. I
> > > > have seen
> > > > a couple that plug into the pin field on the RPi, but I am
> > > > trying to
> > > > keep
> > > > the
> > > > case clean. I have built up a power supply with a battery on
> > > > it, and
> > > > a heavy
> > > > duty USB dual port power cartridge that supplies the power I
> > > > need for
> > > > the
> > > > RPi and the WX station console. It is kind of big, I am
> > > > certainly
> > > > looking
> > > > for
> > > > one of the power pack batteries that does not care if it is
> > > > being
> > > > charged or
> > > > not.
> > > >
> > > >
> > > > > I hope that this is pointing you in the right direction to
> > > > > your
> > > > > particular circumstances.
> > > >
> > > >
> > > > Yes it confirmed most of what I was already suspecting. Now if
> > > > I can
> > > > just
> > > > find a nice clean battery pack that meets the above
> > > > requirement.
> > > _______________________________________________
> > > PLUG mailing list
> > > PLUG@lists.pdxlinux.org
> > > http://lists.pdxlinux.org/mailman/listinfo/plug
> > >
> > _______________________________________________
> > PLUG mailing list
> > PLUG@lists.pdxlinux.org
> > http://lists.pdxlinux.org/mailman/listinfo/plug
> >
>
>
>
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