Traxxas 2970 EZ-Peak Plus 4-Amp NiMH/LiPo Fast Charger with iD Auto Battery Identification Charger recognizes Traxxas iD batteries to automatically program and optimize charger settings. Charges 5-8-cell NiMH batteries and 2S and 3S LiPO batteries One button LiPO storage charge protects your battery investment and advanced high-resolution peak detection delivers a perfect charge Easy to use interface with charge progress indicator and integrated cooling fan Advanced Mode for full manual control of charger settings and integrated balance ports for conventional LiPO batteries Refer user manual for troubleshooting steps