Tenergy 1-4 Cells Li-PO/Li-Fe Balance Charger - Great For Airsoft & RC Car Battery Packs 01267 Built-in balancer. Batteries are automatically balanced during charging, ensuring full charge Advanced individual charging method-charge each cell individually Light weight and compact design Fits 1S to 4S Li-PO/Li-Fe battery packs with XH type balance connector Applicable for Li-ion, LiPo and LiFePO4 battery packs. Buy with confidence, your charger includes a 12-month warranty. Built-in balancer. Batteries are automatically balanced during charging, ensuring full charge Advanced individual charging method-charge each cell individually Automatically charging process - makes it easy to use Lightweight and compact design Safer and faster charging for better battery performance and life Fits 1S to 4S LiPo/LiFePO4 battery packs with XH type balance connector Multiple protection features provide maximum safety Powered by an external AC adapter (100-240V AC) for worldwide use Input: DC 10-16V, 1.0-1.5A Output: DC 4.2V-16.8V (LiPo) / DC 3.6V-14.4V (LiFePO4) Charging Current: 1.0A Applicable Battery Types: LiPo/Li-ion/LiFeO4 Charger Dimensions: 3.5&#034; x 2.3&#034; x 0.7&#034; / 88 x 57.3 x 16.8 mm Weight:  Approx. 110g (Adapter) +100g (Charger) Reserve Polarity Protection: YES Short-Circuit Protection: YES Input Voltage Protection: YES <span class="a-text-bold">DO NOT</span> charge the following types of battery: * Lead acid battery or VRLA * NiMH or NiCD battery pack * Non-rechargeable battery (explosion hazard) * Faulty or damaged battery * Any other types except for LiPo/Li-ion/LiFePO4 battery packs. <span class="a-text-bold">NEVER</span> attempt to charge 2 battery packs simultaneously.