I'm playing catchup with your videos (doing an AWESOME job btw, keep it up!), so you might've learned this trick already.
What I do with the Wireless Access Terminal to never run out of charge is keep a Resonant Flux Capacitor in the ME network. When you access the Wireless Access Terminal and you notice the charge level is getting low, just type "res" and pull the Res Cap out directly into your hotbar.
Since the current item you're holding just so happens to be the Wireless Terminal, it will recharge automatically. You can even just hold the thing you replaced on your hotbar on your cursor while it charges (full charge only takes about 5 seconds), then put the item back on your hotbar and drop the Res Cap back in the ME.
Again, loving the series :)