Mini 4WD AA NiMH Batteries Neo-Champ (2 pieces); Tamiya Mini 4WD Battery ITEM15420; This battery is perfect for the Tamiya certified competition. High performance rechargeable NiMH battery for use in Tamiyas official competitions. Compared to alkaline batteries, it is stronger and more powerful at low temperatures and weighs approximately 0.7 oz (19 g) per bottle. It can be recharged for about 2,000 times (*) and is economical. In addition, it has low self-discharge and can be continuously recharged. Also available in Neo Champ (2) and Rapid Charger sets. For ages 14 and up. If used by individuals under 14 years old, be sure to be used by parents correctly (Basic Performance) Capacity: Min.950 mAh / Minimum capacity of batteries based on charging and discharging conditions of JIS C8708 2007 (7.2.1). Charging: Approximately 2,000 times / Life estimated based on JIS C8708 2007 (7.4.1.1) test conditions. Actual life may vary depending on the type of mini 4WD and usage conditions. Precautions for Use: The Neo Champ is a rechargeable battery for mini 4WD use. Do not use for anything other than Mini 4WD models. Please use it correctly after reading the Neo Champs instructions and the Mini 4WD warnings. Neo-Champ cannot be used on RC 4WD Mini F Dangan Racers, Fun Trains, Fun Crafts, and Robotcraft Series. Please use alkaline or manganese batteries. There are also machines that cannot be used even in mini 4WD