Main Features:
● Battery holder box for 4PCS AA size batteries.
● This battery holder can hold AA standard size 4 batteries， either for alkalescent or rechargeable batteries.
● This battery holder can be make to 6V battery output(1.5V x 4 =6V).
● Perfect external power source for single chip microcomputer system， Arduino system， 2WD mobile robot， track-seeking car， RP5 tracked vehicle.