Khepera IV external charger pack:
The K4 external charger pack is an option to the expansion board. Composed by two batteries, an external charger and a power supply. It is used to add autonomy to the Khepera IV robot. The additional battery of 3600mAh adds about 5 hours of autonomy to the Khepera IV. It is particulary indicated when you use a Stargazer and / or a LRF module, in order to save the autonomy of the robot.
Another advantage is that you are able to change the additional battery while the nattive battery inside the robot is still powering the robot, making unnecessary to restart your robot and allowing you to run a virtualy unlimited experimentation time.
The additional battery is plugged into the expansion board (not included in the K4 external charger pack).
The pack include two additional batteries and the charger which can charge up to 2 batteries in about 4 hours.
Here is a brief summary of the gain of autonomy with the additional battery :
|Setup||Autonomy without additional battery||Autonomy with additional battery|
|KheperaIV alone||about 7 hours||about 12 hours *|
|KheperaIV with LRF||about 5 hours||about 8.5 hours *|
|KheperaIV with StarGazer
||about 4 hours||about 7 hours *|
|KheperaIV with LRF+StarGazer
||about 3 hours||about 5 hours *|
|KheperaIV with Gripper
||about 4 hours||about 7.5 hours *|
|KheperaIV with Gripper+LRF+StarGazer
||about 2.5 hours||about 4.5 hours *|
*Time indicated above are average, depending of the CPU and motor use.
|Additonal battery (the pack includes two of them)||External charger, it can charge up to two batteries in the same time in about 4 hours.|