As the name implies, FJDynamics’ Pony 500 houses a 504-watthour (Wh) battery. FJDynamics uses a lithium nickel manganese cobalt oxide (NMC) battery that allows the Pony 500 to be more compact and usable in a wider temperature range. A lithium iron phosphate battery (LiFePO4), which is used in many power banks, lasts longer.
The Pony