Building your own Battery Pack

Snapshot

So, you’ve built your predictive design and now it’s time for the rubber to meet the road – the infamous AP-on-a-Stick survey. To perform this piece of your wireless design you’ll need a lot of “unique” gear… tripods, laptop shelves, tons of wireless adapters, APs, and enough battery power to get you through the day.

When I was building out my survey kit, I noticed one flaw with the “professional” battery packs built for wireless surveys. Beyond being very bulky and expensive, the majority of them only support 802.3af. The newer and larger APs often prefer 802.3at (also called PoE+) these days. In some cases, they can use 802.3af, but they turn off several spatial streams in the 2.4GHz radio to adjust for the lack of power.

That’s less than ideal, isn’t it?

Thanks for the Internet, I was able to cobble together a pretty affordable battery pack that supports both 802.3af and 802.3at and lasts an incredibly long time. Here’s the pieces and parts that have worked for me:

Intocircuit 26000mAh High Capacity Battery Pack

Tycon Systems TP-DCDC-2448GD-HP DC Converter

Power Jack Adapter Plug

The total will run you about ~$140.00 and it lasts for an extremely long time. Just power up the Intocircuit, hook it up to the Tycon converter using the adapter, and connect your AP. I’ve used it for several gigs now and despite looking a little “homemade,” it does the trick.

5 thoughts on “Building your own Battery Pack”

  1. Might be a silly question but the power jack doesn’t appear to fit the battery pack without cutting away some of the plastic exterior? Also the bit that plugs into the injector looks black and not green as in the images online of the Tycon injector – did you have to get a different piece there?

    Thanks!

    Like

    1. Hey Kurtis,

      No cutting of the plastic was required, thankfully. The Intocircuit came with a huge assortment of adapters and I was able to use what they provided combined with the adaptor from Amazon that I linked to connect directly to the Tycon injector. And the Tycon injector is still using the green block, but the lighting at my desk is… pretty bad… so the phone seems to have done some unrequested color corrections and changed it to black. Let me know if you have any questions.

      Thanks!

      Sean Freeman

      Like

      1. Sean,

        Thanks for the insight, after a comedy of errors on the shipper’s part I have the injector partially working. Did you have trouble with the injector led showing red that it is getting power but the AP not powering up? I’ve tried a few different model APs (all from Aruba/HPE however) and none light up. Talking to Tycon, they seem to think the APs I’m using (Aruba AP-105) aren’t fully PoE compatible.

        Anyway, if you ran into this, I’d love to know. Thanks1

        Like

  2. Sorry for the late reply! No, that is not something that I ran into. I also tested using Aruba APs, the 103, 205, and 109 and they all worked without issue. Unfortunately I don’t have an 105 I can use for testing, but the spec sheet for the 105 lists 48 V DC 802.3af compatibility, same as the 205.

    Like

    1. No worries – turns out I had a damaged injector – got it replaced and everything is working! Thanks again for your information!

      Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s