Battery guide for remote-controlled cars, boats, helicopters and drones
NiMh and LiPo – what is the difference?
There are two main battery types for RC: NiMh and LiPo. The choice has a big impact on performance, handling and lifespan.
NiMh battery (Nickel Metal Hydride)
NiMh is the classic, well-known battery type. A typical 7.2V NiMh battery consists of 6 cells of 1.2V each (1.2V × 6 = 7.2V).
NiMh batteries have one connector, which is used for both driving and charging. You can usually see or feel them as several round cells joined together in a pack.
Advantages
- Easy to use – suitable for children and beginners
- Cheaper than LiPo
- Less sensitive to incorrect use
Disadvantages
- Gradually lose power during the run
- Heavier than LiPo
- Must cool down before recharging
- Should be discharged before recharging (should not be topped up)
LiPo battery (Lithium Polymer)
LiPo is the modern battery type with higher performance and lower weight. A 2S LiPo is typically 7.4V (3.7V × 2 cells).
LiPo batteries have two connectors: A main connector (for power) and a balance connector (for charging and cell monitoring).
LiPo delivers constant power throughout the whole run time and gives a higher top speed and better acceleration.
Advantages
- High performance and more punch
- Constant power throughout the run
- Lower weight
- Can be topped up without loss of performance
Disadvantages
- Must never be fully discharged
- Requires a suitable charger with balancing
- Requires extra care when stored
- Not recommended for children without supervision
Important when using LiPo
- Always use a LiPo safety bag when charging and storing
- Use the LiPo cutoff (LVD) in the car – or a LiPo alarm/buzzer
- Stop driving when the battery is low
- Let the battery cool down before charging
- Store the battery in “storage mode” or approx. 50% charged
A common mistake is to put an almost empty LiPo battery on the shelf for a long time. It will slowly self-discharge and can become unstable or swell up. Such damage is not covered by the warranty.
Warranty and claims
The lifespan of batteries depends on correct use. Damage caused by over-discharge, incorrect charging or incorrect storage is not covered by the warranty.
Hobbyviking recommends using models with Low Voltage Detection (LVD) or an external LiPo buzzer to protect the battery.
