More types of rechargeable batteries, but used in model aircraft above require large energy density, light weight, large discharge current, the current main use of nickel cadmium battery, nickel metal hydride battery and lithium ion batteries. Rechargeable battery internal resistance is low, beware of short circuit when using, otherwise may cause burns, fire.

   Nickel cadmium battery (Ni - Cd) main characteristic is excellent large current discharge performance of rc short time high power requirements. Rechargeable battery is an important performance index discharge rate. So-called discharge ratio, is refers to the maximum continuous discharge current of battery capacity with the ratio of C. C is a amp discharge to complete the required number of hours. Usually before capacity C plus a digital representation. For example, Mr 1800 mah battery discharge ratio of 10 C, which said its largest continuous discharge capacity of 18 for a, visible discharge ratio is a important index to measure the battery discharge performance of. Due to the production process and structural differences, different brand battery discharge rate is often different. Domestic nickel battery isolation for 6 ~ 12 c c, commonly to import batteries usually, especially special power battery model aircraft, often up to about 20 c, choose the battery is first choice of high discharge rate batteries.

   But the nickel battery energy density is small, and a memory effect, waste battery pollution to the environment is larger, soon to be eliminated, only used in the occasion of large output current. Nickel metal hydride batteries (NiMH) is a kind of environmentally friendly rechargeable batteries, the use of performance and charging ways, like nickel battery insulation, nominal voltage is 1.25 v, but more power density, has been in quite a number of occasions to replace the nickel battery, just less than in large current discharge performance of nickel batteries, generally at about 7 c.

Nickel batteries and nickel-metal hydride batteries with the same series of models, the commonly used mainly with SC type, type A, AA (5), AAA (7), etc. In addition there will be some special types of batteries, they are usually made by standard cell model specifications derived lengthen or shorten the model. Battery monomer (battery core) sometimes directly to the battery size for marking, such as 18650, 18650, they marked is 18 mm in diameter, length is 65 mm respectively, and 8 mm single cells. Model aircraft and receiver to use the power of motor, they generally in more than 5 v voltage, power group generally above 9 ~ 12 v, it need more batteries in series, nickel is commonly used in spot welding connection. Amateur can use copper soldering, but pay attention to the welding time is short, to avoid the battery is damaged.

   Lithium-ion polymer battery (Li - Poly real) is the mainstream of rechargeable batteries. It has been widely used in mobile phones and other handheld electronic products. Lithium ion polymer monomer voltage of 3.6 v, the energy density is big, the quality is light, no memory effect. But the lithium ion battery charge and discharge demand is higher, it is hard to do large current discharge, otherwise very easy to damage the battery. And the model aircraft dedicated lithium-ion polymer battery discharge capacity has reached more than 10 c, at the same time, the safety of the lithium ion polymer battery has no problem, but need special charge and discharge protection circuit protection. Lithium-ion polymer battery case form very much, mostly flat cuboid, and with special each battery protection circuit, the discharge voltage is lower than a certain time or above a certain time will automatically protect the discharge current, a lot of battery protection circuit with charging protection function. Lithium-ion polymer battery with aluminum composite flexible packaging in the structure, is different from the early liquid batteries, lithium ion battery (Li - ion) of metal shell, in the event of a safety hazard, liquid batteries easy explosion, and the polymer batteries will only at most courage.