NiMH Batteries are the most common in hobbies and radio controlled cars. These use a hydrogen-absorbing alloy rather than cadmium as in the NiCd Batteries. NiMH doesn't hold as much charge-per-weight as the NiCd, and if left for a while they self-discharge. More care is also needed when storing these batteries, the generally accepted method is to leave them with 50% change when storing them. Then when you want to use them you need to discharge and peak the battery.

While most batteries don't have a a memory, it's always best to look after them as this will increase their life span. It's always a great idea to attach Ultra-Plugs a.k.a Deans plugs when you first get your battery.

A 2000mAh NiMH six cell battery pack

The main advantages of NiMH batteries over other types are :

• NiMH batteries are ideal for high current drain applications, like racing radio controlled cars
• NiMH batteries are relatively inexpensive and can be found from almost any electronic or hobby shop
• While the voltage is slightly lower, they are the idea replacement for alkaline batteries
• The newest NiMH batteries have a low self-discharge rate, much lower than pre-2005, this has increased their shelf life considerably

NiMH are the batteries most commonly used in hybrid and electric full scale cars

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