Specification:
you can convert aa battery to D battery, and with aaa to aa converter you can covert aaa battery to D battery.(AA or AAA Battery is not included in the package)
Voltage output: 1.5V. Convert 1 aa to d battery, or convert 1 aaa to d battery.
This aa to d adapter and aaa to aa adapter are made from environmental protection plastic material.
Weight of aa to d adapter: 0.35OZ/9.5g. With aaa to aa battery holder and aa to d size battery adapter, you don't need to buy the expensive and heavy D size battery and D battery charger.

Package Contents
6 x AA to D battery adapter converter
6 x AAA to AA battery adapter holder