There are different types of batteries that you can find on the market these are broadly segregated by their chemical composition. All of these batteries have their own pros and cons. Hence, we cannot say that one is better than the other. It is always a trade-off between various factors. The following is a list of batteries you can find on the market along with their pros and cons:
| Battery | Peak power output | Power-to-weight ratio | Price |
| Wet cell | Low | Extremely low | Cheapest |
| Nickel metal hydride | Medium | Low | Cheap |
| Lithium ion | High | Good | High |
| Lithium polymer | Extremely high | Extremely good | Extremely high |
As you can see from this table, the peak power output is something which we highly want and so is the good power-to-weight ratio; hence, spending a good amount of money on a lithium polymer battery makes sense.
These batteries, at a minimum, have a 20 C rating with a power-to-weight ratio around five times higher than the normal wet cell batteries. However, they can be up to 10 times more expensive than the normal wet cell batteries.
Now we know which batteries to choose for those higher current requirements. A lithium polymer battery of 11.1V and 2200 mAh will not cost you more than $20 and will provide you with immense power that you may never need. So, we have the power supply issue sorted. Now it's time to go ahead and make the robotic hand operational.