Battery kit for Suunto D9 Receiver and Transmitter (Complete) Kit includes For the Receiver: New lithium battery and o ring. For the Transmitter: New 3V battery CR 1/2 AA battery, HP port o ring, transmitter cover o ring and silicone lube. Includes everything you will need to change the battery in your Suunto D9 dive computer both receiver and transmitter. Contained within the kit is replacement lithium batteries, all the o rings you will need to seal both the receiver and transmitter and o-ring lubricant.