LiPo Batteries
Lithium polymer batteries (commonly called LiPo) are frequently used in drones and other places where maximizing energy capacity per weight and volume is necessary. We have used LiPo batteries on our robot for this same reason. A Lead-Acid battery, a kind frequently used on cars, will weight and take up the space 2-3x of an equivalent capacity LiPo battery. Alternative battery technologies such as lithium-ion or LiFePO4 are interesting, but the wide spread use of LiPo batteries in drones and RC cars makes the price much more affordable. However, LiPo batteries can also be very dangerous if mishandled.
LiPo batteries are perfectly safe if treated properly, but it is important to know the potential risks and take measure to mitigate them. Here is an example of what happens if a LiPo battery is punctured. Note that this battery is much smaller than the capacity of batteries which we normally use.
Please read this entire guide on safety measures for LiPos. You should know this entire list, but I will list the specific measures we take.
- Puffed or damaged batteries should immediately be safely discharged and properly disposed of.
- Store batteries in one of our fire proof bags. Fully charged batteries should be placed in the individual bags.
- Use the dedicated LiPo charger in Balance charge mode to ensure proper cell voltages and charging current.
- Be aware of the "Metal fire" fire extinguisher in the shop. This is the proper way to extinguish a LiPo battery fire.