Requirements: 5V/2.5A for 6 hours.
Which battery type is best suited? Weight factor in the mid-range.
Application: powering two W-LAN IP cameras to be mobile i.e. position anywhere on the layout or even on the roof of the house.
Thanks!
a couple of these -
http://www.all-battery.com/li-ion18650111v13ahrechargeablebatterypackwithpcb31067.aspx
with one of these -
http://www.all-battery.com/tenergymicro-controlledli-poli-ionbalancechargerwlcddisplayand110-240vacto12vdcadaptor8aswitchpowersupply.aspx
and a couple of these -
http://www.all-battery.com/tenergyuniversaldc-dcconverterandvoltagestablizer--anyvoltagecontrolnew.aspx
Coupon code - T0607 for 11% off till the end of the month
-Brian
Thanks Brian, that’s a start. Kind of pricey.
Hans-Joerg Mueller said:Well, you didn't mention low price as a requirement! :P
Thanks Brian, that's a start. Kind of pricey.
-Brian
You’re looking for like 15 amp hours. That’s a BIG battery. How much space you have for it. How fast do you need to charge it?
HJ,
Maybe you should just run an electricity hose. 
Steve Featherkile said:
HJ,Maybe you should just run an electricity hose.
That would mean training the operators from the first session on: “Do not trip on the electricity hose!” and … well you know the rest.
Since the cams are wireless I’d like to take it one step farther without an electricity hose!
The “hoses” for three of the cams are done, up and running. Sorry can’t watch SWMBO planting trees, unless I give out the new addresses.
I recommend moving to the sunny South so you could use cheap lead-acid batteries and solar collectors
Ralph
Ralph Berg said:Ohhh I thought they could be used in the Sunny Okanagan, too?!?
I recommend moving to the sunny South so you could use cheap lead-acid batteries and solar collectors ;) Ralph
I settled for a 6V/14AH lead/acid - small enough for the purpose, along with the dummy-proof charger. All I need to rig up is the 5V regulator and the “case” for the cam/battery combo. 
With only a 6 volt supply may I suggest using a LM138/LM338 regulator. It has a lower voltage drop across the device than using the 78xx series devices.
The one I suggested is a 5A regulator.
Thanks Dennis!
Well gang, built two of the set-ups. Leftover Plexi and acrylic rod, a 6V battery with umph, an inexpensive voltage regulator together with an on-off switch.
(http:///P1/IP-Cams03_s.jpg)
Then I mangled … errrr … I mean modified a tent peg for a quick-connect/disconnect ground spike.
(http:///P1/IP-Cams06_s.jpg)
Now the puppy can be set down anywhere, even planted in the dirt
(http:///P1/IP-Cams09_s.jpg)
and the video pictures are good enough
(http:///P1/IP-Cams05_s.jpg)
To tune focus - I didn’t on the above picture - I drag the laptop to the location and have at it. Sometime when I’ll have nothing better to do I’ll dig into the CGI delight to embed the picture in a different page on my hobby website. PS the battery lasts for close to 24 hours that should be good enough for any op-session. :lol: :lol:
That’s slick.
And the battery adds some weight to hold the silly thing still.