7-4v 4000mah - Storm-batt-lpb-744025 walkera esky specialist, you can find and buy walkera battery 4000mAh 7.4v and esky helicopter and parts in the lowest price, the most complete walkera and esky. Duratrax lipo 7 4v 4000mah 25c car truck stick pack deans u plug this is the duratrax 4000mah 7 4v stick lipo battery with deans connector features:

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This is Li-Po Battery Pack 7.4V 4,000mAh - the lithium polymer battery pack of 7.4 volt operating voltage and 400mah battery capacity. The lipo battery dimension is 5.0 x 65 x 110mm. Up to 1,000 times of charging time. This is low internal resistance battery to consider. The battery dimension you should consider too, is this match with your rc battery slot?