|Commercial Protected battery holder|
The one thing that I thought I needed is a protected battery holder, since the batteries have no protection circuit built in. Plus some sort of keyed connector - when I got these on eBay, they came with the JST connectors sets - maybe it was a mistake since the listing doesn't mention it in the listing, but a welcome surprise.
|Firecracker Battery holder|
My first take at a battery holder. Kind of looks like a firecracker, doesn't it? Just took the battery and wandered around the local home supply store and tried different things. I love PVC, I found these gizmos that press fit onto the battery. I scavenged some springs from an AA battery holder - drilled a hole in the end and ran the wire through. Voila - dangerous, but serviceable. Made sure that it had all kinds of markings identifying which end is which. This plus a protector board, a JST connector will find its way outside to the weather transmitter.
|The KahnFire Charger setup|
|The protection board in the circuit|
|And the charger|