Quantity   Component name
1 × Raspberry Pi Model A
1 × Raspberry Pi Camera module Comes with cable to connect to Raspberry Pi
1 × DS3231 RTC Temperature compensated RTC, so should hold time much better than cheaper alternatives
1 × MoPi: Mobile Pi Power (with stackable headers) http://shop.pimoroni.com/products/mopi-mobile-pi-power
16 × AA NiMh rechargeable batteries 2 sets of 8; highest capacity possible (other batteries could be used - eg. 2x18650 Li-ion)
1 × 8xAA Battery Holder
2 × Waterproof case Cheap cases from China via ebay. Time will tell if they are waterproof!
1 × USB extension cable A plug to A socket
1 × 4 way bell wire
1 × SPST momentary push switch