How long does it take to charge a RC helicopter?

The answer to this question depends on several factors, including the type of RC helicopter, the type of battery, and the charging method. Generally speaking, it can take anywhere from 30 minutes to several hours to charge a RC helicopter.
For most RC helicopters, the battery type is usually either a NiMH or LiPo battery. NiMH batteries are typically charged with a wall charger, which can take anywhere from 30 minutes to several hours depending on the size of the battery and the charging rate. LiPo batteries, on the other hand, are usually charged with a balance charger, which can take anywhere from 30 minutes to several hours depending on the size of the battery and the charging rate.
The size of the battery is also an important factor when it comes to charging time. Generally speaking, the larger the battery, the longer it will take to charge. For example, a small NiMH battery may take 30 minutes to charge, while a larger NiMH battery may take several hours. Similarly, a small LiPo battery may take 30 minutes to charge, while a larger LiPo battery may take several hours.
The charging rate is also an important factor when it comes to charging time. Generally speaking, the higher the charging rate, the faster the battery will charge. For example, a NiMH battery may take 30 minutes to charge at a 1C rate, while it may take several hours to charge at a 2C rate. Similarly, a LiPo battery may take 30 minutes to charge at a 1C rate, while it may take several hours to charge at a 2C rate.
Finally, the type of RC helicopter is also an important factor when it comes to charging time. Generally speaking, larger RC helicopters with larger batteries will take longer to charge than smaller RC helicopters with smaller batteries. For example, a large RC helicopter with a large NiMH battery may take several hours to charge, while a small RC helicopter with a small NiMH battery may take 30 minutes to charge.
In conclusion, it can take anywhere from 30 minutes to several hours to charge a RC helicopter, depending on the type of RC helicopter, the type of battery, the size of the battery, and the charging rate.