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LiPo Vs. NiMH Battery Technology

by Dwight Chestnut

Both Lithium Polymer (LiPo) and Nickle Metal Hydride (NiMH) batteries are used heavily in the radio controlled car, airplane and hobby industry. NiMH batteries have been the industry standard for years. But now, LiPo is replacing NiNH as the standard in this industry because they provide a better overall performance.

Energy and Weight

LiPo batteries weigh less and produce 350 percent more energy than NiMh. This is a significant advantage considering remote control enthusiast seek to reach the highest power levels while carrying the lowest possible weight.

Internal Resistance

LiPo has a lower internal resistance than NiMH. Low resistance produce less heat and a more stable and efficient discharge of the energy necessary to power systems.

Discharge Curve

LiPo batteries have a much slower discharge curve than NiMH batteries and as a result, the battery performance is constant until used up. For example, it's common to experience a slow degradation in the audio of a battery powered portable CD player as the battery runs down because non LiPo batteries have a fast discharge curve. If using batteries with a slower discharge curve, the audio will remain constant until the battery's energy is depleted.

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