Duratrax Onyx One-Fifty AC/DC Balancing LiPo Charger with Power Supply, Connectors and Cooling Fan The best of the best for fast, affordable LiPo charging and balancing! Designed for use with 1-3S LiPo batteries. Not compatible with NiCd or NiMH packs. 90-minute safety timer protects packs from overcharging, and protects the charger with solid-state reverse polarity and current overload circuitry. An auto-start feature, charge status LED and sound cues simplify set-up. Includes charger with built-in AC power supply, Star Plug connector, Traxxas adapter and 3S balancing plug with 2S adapter.