This is a 20 cell (24VDC) 10000mAhr Rechargeable NiMH battery pack. These are used to power the SuperDroid Treaded HD2 Tanks or our ATRs. They can also have many other uses too. The batteries are NiMH so they do not have the memory issues common with NiCad battery packs. The batteries are arranged with the two outside rows by 7 cells and the middle row with 6 cells. The cells are D size interconnected via soldered strips and covered with a PVC wrapping (color may be different than photo). Two 14AWG ~24" wire leads extend out of the pack. These packs also have a built in thermal overload set for 25Amps that will reset upon cooling.
As an option you can select to get connectors for the batteries. The connectors are sometimes referred to as Anderson Powerpole connectors. They can be soldered/crimped onto the wire ends and offer a great way of disconnecting the batteries for charging, etc. The 15A connectors and 30A connectors are the same and can plug into one another, they only are for different gage wires.
The B3 Compact charger is a very simple to use charger for 7.4 2S and 11.1 3S battery packs. No need for additional power supplies or 12v batteries as this little unit has its own built in power supply that can be powered with 100-240v.
2WD self balancing robot! This kit is a perfect plataform for learning Arduino, PID control, serial communications(Serial, I2C, SPI), PWM signals, IMU filtering, etc.